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The following license applies to all but the firmware/usbdrv directories. For
that directory, please refer to the firmware/usbdrv/License.txt file for
additional license restrictions.
-------------------------------------------------------------------------------
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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$Id: Readme.txt,v 1.1 2006/09/26 18:18:27 rschaten Exp $
For full documentation and examples, take a look at htmldoc/index.html.
Introduction
============
The USB-LED-Fader is a device to control a number of LEDs via USB. I built it
to display the online-status of my internet-connection, the recording-status of
my videorecorder, and warnings if the available disc-space is low. You can
imagine an endless number of applications for this.
The LEDs are controlled with pulse width modulation (PWM). That way, they are
not only on or off, it is possible to control the brightness. Included in the
device is a number of 'waveforms' that can be displayed on the LEDs. That way,
one LED can display some kind of a sinus- or triangular wave without any
interaction with the controlling host.
Every LED can be controlled individually, each one can display it's own
waveforms.
You can assign three different waves to every LED: two 'eternal' waves (0 & 1).
They are displayed alternating until anything different is required. The third
wave (2) is only displayed once, afterwards the device will switch back to
alternating between the first two waves.
One wave is described by three parameters: the waveform, the duration for one
repetition of the wave and the number of repetitions before switching to the
next wave.
This version supports four LEDs, it should be quite easy to change that number
between one and eight. I have not tested any number greater than four, but I
can imagine that the load on the controller can be too high to reliably
communicate via USB.
There are three parts included in the distribution: The firmware for an ATmega8
microcontroller, a commandline-client that can be run under Linux, and the
circuits needed to build the device.
This project is based on the PowerSwitch example application by Objective
Development. Like that, it uses Objective Development's firmware-only USB
driver for Atmel's AVR microcontrollers.
Objective Development's USB driver is a firmware-only implementation of the USB
1.1 standard (low speed device) on cheap single chip microcomputers of Atmel's
AVR series, such as the ATtiny2313 or even some of the small 8 pin devices. It
implements the standard to the point where useful applications can be
implemented. See the file "firmware/usbdrv/usbdrv.h" for features and
limitations.
Building and installing
=======================
Both, the firmware and Unix command line tool are built with "make". You may
need to customize both makefiles.
Firmware
--------
The firmware for this project requires avr-gcc and avr-libc (a C-library for
the AVR controller). Please read the instructions at
http://www.nongnu.org/avr-libc/user-manual/install_tools.html for how to
install the GNU toolchain (avr-gcc, assembler, linker etc.) and avr-libc.
Once you have the GNU toolchain for AVR microcontrollers installed, you can run
"make" in the subdirectory "firmware". You may have to edit the Makefile to use
your preferred downloader with "make program". The current version is built for
avrdude with a parallel connection to an stk200-compatible programmer.
If working with a brand-new controller, you may have to set the fuse-bits to
use the external crystal:
avrdude -p atmega8 -P /dev/parport0 -c sp12 -U hfuse:w:0xC9:m \
-U lfuse:w:0x9F:m
Afterwards, you can compile and flash to the device:
make program
Commandline client
------------------
The command line tool requires libusb. Please download libusb from
http://libusb.sourceforge.net/ and install it before you compile. Change to
directory "commandline", check the Makefile and edit the settings if required
and type
make
This will build the unix executable "usb-led-fader" which can be used to
control the device.
Usage
=====
Connect the device to the USB-port. All LED should flash up to indicate that
the device is initialized.
Then use the commandline-client as follows:
usb-led-fader status
usb-led-fader set <ledId> <waveId> <waveformId> <periodDuration> <repetitionCount>
usb-led-fader clear <ledId>
usb-led-fader reset
usb-led-fader show <waveformId>
usb-led-fader test
When using the set-function, it is possible to define several waves at once.
You simply have to give the parameters for all waves. See examples below.
Parameters
----------
- ledId: ID of the LED (0-n, depending on the number of LEDs in your circuit).
- waveId: ID of the wave (0-1: constant waves, 2: override).
- waveformId: ID of the waveform (0-31: brightness, 32-37: patterns). For a
reference to the patterns, consult the function fade_calculateWaveform() in
the file "firmware/main.c".
- periodDuration: Time in sec/10 for one repetition of the waveform. A value of
0 can be used to reset the wave.
- repetitionCount: Number of repetitions before switching to the next wave. A
value of 0 can be used to repeat this forever.
Examples
--------
-> Get the status of all LEDs:
usb-led-fader status
This will result in an output similar to this:
LED 0 curid curvalue curpos currep nextupd
0 2 26 0 23
wave waveform length repeat duration updtime
0 38 32 1 20 45
1 0 1 1 0 1
2 0 1 1 0 1
LED 1 curid curvalue curpos currep nextupd
0 14 19 0 19
wave waveform length repeat duration updtime
0 38 32 1 20 45
1 0 1 1 0 1
2 0 1 1 0 1
LED 2 curid curvalue curpos currep nextupd
0 31 16 0 43
wave waveform length repeat duration updtime
0 38 32 1 20 45
1 0 1 1 0 1
2 0 1 1 0 1
LED 3 curid curvalue curpos currep nextupd
0 6 9 0 39
wave waveform length repeat duration updtime
0 38 32 1 20 45
1 0 1 1 0 1
2 0 1 1 0 1
In this output, the values curvalue, curpos, nextupd and updtime are for
debugging purposes only. They shouldn't be of interest to the common user. The
meaning of the other values should be clear.
-> Set the first LED to keep a middle brightness:
usb-led-fader set 0 0 15 10 1
So, on LED 0 the wave 0 is set to waveform 15. It will stay there for one
second and will be repeated once before switching to the next wave. There is no
next wave because we didn't define one, so this waveform will stay forever.
-> Now set a second wave on the first LED, a little brighter than the one
before:
usb-led-fader set 0 1 25 10 1
This is wave 1 on LED 0, waveform 25 indicates a constant level of brightness.
After setting the second wave, it will alternate with the first one after every
second, because both waves have the same duration and the same number of
repetitions.
-> Set a third wave on the first LED:
usb-led-fader set 0 2 36 20 5
This sets the third wave (wave 2) on the first LED. Waveform 36 is a nice
sinus-like wave, so the LED starts to fade. One period of the fading takes 2
seconds, it is repeated for 5 times. Since this is the third wave, after the
repetitions the LED returns to alternating between wave 0 and wave 1, this wave
is discarded.
-> Set multiple waves at once:
usb-led-fader set 0 0 15 10 1 0 1 25 10 1 0 2 36 20 5
This will set all of the above waves at once. Thus, the first LED will first
fade the sinus-wave five times, then start alternating between the two
brightnesses in one-second-rhythm.
Clear the first LED:
usb-led-fader clear 0
This will clear all three waves on the first LED.
-> Reset the device:
usb-led-fader reset
All LEDs will flash once, to indicate that the device is reset and the LEDs are
working.
-> Show a waveform on the screen:
usb-led-fader show 36
This will lead to an output like the following:
wave 36 - length 64
31: *****
30: *********
29: ***********
28: ***************
27: *****************
26: *******************
25: *******************
24: *********************
23: ***********************
22: *************************
21: *************************
20: ***************************
19: *****************************
18: *****************************
17: *******************************
16: *********************************
15: ***********************************
14: ***********************************
13: *************************************
12: ***************************************
11: ***************************************
10: *****************************************
9: *******************************************
8: *********************************************
7: *********************************************
6: ***********************************************
5: *************************************************
4: *****************************************************
3: *******************************************************
2: ***********************************************************
1: ****************************************************************
================================================================
Keep in mind that the width of the displayed wave corresponds to the length of
the waveform. If you display a very simple one like the constant brightness
levels (0-31), the length is 1. Therefore only one column is displayed.
-> Test the device:
usb-led-fader test
This function sends many random numbers to the device. The device returns the
packages, and the client looks for differences in the sent and the received
numbers.
Drawbacks
=========
As mentioned above, controlling the PWM for several LEDs is a lot of work for
one small microcontroller. Speaking the USB protocol is so, either. Both
combined result in a lot of load on the device, so the communication with the
device is not 100% reliable. More than 99% though, at least in our tests.
SO BE WARNED: You should not use this device to control the state of your
nuclear reactor. If you intend to use it in that way despite of this warning,
please let me know... ;-)
Files in the distribution
=========================
- Readme.txt: The file you are currently reading.
- firmware: Source code of the controller firmware.
- firmware/usbdrv: USB driver -- See Readme.txt in this directory for info
- commandline: Source code of the host software (needs libusb).
- common: Files needed by the firmware and the commandline-client.
- circuit: Circuit diagrams in PDF and EAGLE 4 format. A free version of EAGLE
is available for Linux, Mac OS X and Windows from http://www.cadsoft.de/.
- License.txt: Public license for all contents of this project, except for the
USB driver. Look in firmware/usbdrv/License.txt for further info.
- Changelog.txt: Logfile documenting changes in soft-, firm- and hardware.
Thanks!
=======
I'd like to thank Objective Development for the possibility to use their driver
for my project. In fact, this project wouldn't exist without the driver.
And I'd like to give special credits to Thomas Stegemann. He wrote the
PWM-stuff, and I guess it would have been nearly to impossible to me to write
the rest of the project without his help since C isn't my natural language.
About the license
=================
Our work - all contents except for the USB driver - are licensed under the GNU
General Public License (GPL). A copy of the GPL is included in License.txt. The
driver itself is licensed under a special license by Objective Development. See
firmware/usbdrv/License.txt for further info.
(c) 2006 by Ronald Schaten - http://www.schatenseite.de

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Partlist
Exported from circuit.sch at 9/15/2006 14:21:25
EAGLE Version 4.16 Copyright (c) 1988-2005 CadSoft
Part Value Device Package Library Sheet
C1 4,7u CPOL-EUE2.5-5 E2,5-5 rcl 1
C2 100n C-EU025-024X044 C025-024X044 rcl 1
C3 22p C-EU025-024X044 C025-024X044 rcl 1
C4 22p C-EU025-024X044 C025-024X044 rcl 1
IC1 MEGA8-P MEGA8-P DIL28-3 avr 1
IC2 LM317LZ LM317LZ TO92 linear 1
JP1 ISP JP5Q JP5Q jumper 1
LED1 LED5MM LED5MM led 1
LED2 LED5MM LED5MM led 1
LED3 LED5MM LED5MM led 1
LED4 LED5MM LED5MM led 1
Q1 12MHz CRYTALHC18U-V HC18U-V crystal 1
R1 432 R-EU_0207/10 0207/10 rcl 1
R2 240 R-EU_0207/10 0207/10 rcl 1
R3 1k5 R-EU_0207/10 0207/10 rcl 1
R4 68 R-EU_0207/10 0207/10 rcl 1
R5 68 R-EU_0207/10 0207/10 rcl 1
R6 1k R-EU_0207/10 0207/10 rcl 1
R7 1k R-EU_0207/10 0207/10 rcl 1
R8 1k R-EU_0207/10 0207/10 rcl 1
R9 1k R-EU_0207/10 0207/10 rcl 1
X1 PN61729 PN61729 con-berg 1

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# $Id: Makefile,v 1.1 2006/09/26 18:18:27 rschaten Exp $
CC = gcc
LIBUSB_CONFIG = libusb-config
# Make sure that libusb-config is in the search path or specify a full path. On
# Windows, there is no libusb-config and you must configure the options below
# manually. See examples.
CFLAGS = `$(LIBUSB_CONFIG) --cflags` -O -Wall -I../common
LIBS = `$(LIBUSB_CONFIG) --libs`
all: usb-led-fader
.c.o:
$(CC) $(CFLAGS) -c $<
usb-led-fader: usb-led-fader.o
$(CC) -o usb-led-fader usb-led-fader.o $(LIBS)
clean:
rm -f *.o
rm -f usb-led-fader

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/**
* \file usb-led-fader.c
* \brief Commandline-tool for the USB-LED-Fader.
* \author Ronald Schaten
* \version $Id: usb-led-fader.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <usb.h> /* this is libusb, see http://libusb.sourceforge.net/ */
#include "usbledfader.h"
#include "channels.h"
#define USBDEV_SHARED_VENDOR 0x16C0 /**< VOTI */
#define USBDEV_SHARED_PRODUCT 0x05DC /**< Obdev's free shared PID. Use obdev's generic shared VID/PID pair and follow the rules outlined in firmware/usbdrv/USBID-License.txt. */
/* These are error codes for the communication via USB. */
#define USB_ERROR_NOTFOUND 1 /**< Error code if the device isn't found. */
#define USB_ERROR_ACCESS 2 /**< Error code if the device isn't accessible. */
#define USB_ERROR_IO 3 /**< Error code if errors in the communication with the device occur. */
/**
* Displays usage-informations. This function is called if the parameters
* cannot be parsed.
* \param name The name of this application.
*/
void usage(char *name)
{
fprintf(stderr, "usage:\n");
fprintf(stderr, " %s status\n", name);
fprintf(stderr, " %s set ledId waveId waveformId periodDuration repetitionCount\n", name);
fprintf(stderr, " %s clear ledId\n", name);
fprintf(stderr, " %s reset\n", name);
fprintf(stderr, " %s show waveformId\n", name);
fprintf(stderr, " %s test\n\n", name);
fprintf(stderr, "parameters:\n");
fprintf(stderr, " ledId: ID of the LED (0-%d).\n", CHANNELS - 1);
fprintf(stderr, " waveId: ID of the wave (0-1: constant waves, 2: override).\n");
fprintf(stderr, " waveformId: ID of the waveform (0-31: brightness, 32-37: patterns).\n");
fprintf(stderr, " periodDuration: Time in sec/10 for one repetition of the waveform.\n");
fprintf(stderr, " A value of 0 can be used to reset the wave.\n");
fprintf(stderr, " repetitionCount: Number of repetitions before switching to the next wave.\n");
fprintf(stderr, " A value of 0 can be used to repeat this forever.\n");
}
/**
* Reads and converts a string from USB. The conversion to ASCII is 'lossy' (unknown characters become '?').
* \param dev Handle of the USB-Device.
* \param index Index of the required data.
* \param langid Index of the expected language.
* \param buf Buffer to contain the return-string.
* \param buflen Length of buf.
* \return Length of the string.
*/
int usbGetStringAscii(usb_dev_handle * dev, int index, int langid, char *buf, int buflen) {
char buffer[256];
int rval, i;
if ((rval = usb_control_msg(dev, USB_ENDPOINT_IN, USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) + index, langid, buffer, sizeof(buffer), 1000)) < 0) {
return rval;
}
if (buffer[1] != USB_DT_STRING) {
return 0;
}
if ((unsigned char) buffer[0] < rval) {
rval = (unsigned char) buffer[0];
}
rval /= 2;
/* lossy conversion to ISO Latin1 */
for (i = 1; i < rval; i++) {
if (i > buflen) {
/* destination buffer overflow */
break;
}
buf[i - 1] = buffer[2 * i];
if (buffer[2 * i + 1] != 0) {
/* outside of ISO Latin1 range */
buf[i - 1] = '?';
}
}
buf[i - 1] = 0;
return i - 1;
}
/**
* Connect to the USB-device. Loops through all connected USB-Devices and
* searches our counterpart.
* \param device Handle to address the device.
* \param vendor USBDEV_SHARED_VENDOR as defined.
* \param vendorName In our case "www.schatenseite.de".
* \param product USBDEV_SHARED_PRODUCT as defined.
* \param productName In our case "USB-LED-Fader".
* \return Error code.
*/
int usbOpenDevice(usb_dev_handle ** device, int vendor, char *vendorName, int product, char *productName) {
struct usb_bus *bus;
struct usb_device *dev;
usb_dev_handle *handle = NULL;
int errorCode = USB_ERROR_NOTFOUND;
static int didUsbInit = 0;
if (!didUsbInit) {
didUsbInit = 1;
usb_init();
}
usb_find_busses();
usb_find_devices();
for (bus = usb_get_busses(); bus; bus = bus->next) {
for (dev = bus->devices; dev; dev = dev->next) {
if (dev->descriptor.idVendor == vendor && dev->descriptor.idProduct == product) {
char string[256];
int len;
handle = usb_open(dev); /* we need to open the device in order to query strings */
if (!handle) {
errorCode = USB_ERROR_ACCESS;
fprintf(stderr, "Warning: cannot open USB device: %s\n", usb_strerror());
continue;
}
if (vendorName == NULL && productName == NULL) { /* name does not matter */
break;
}
/* now check whether the names match: */
len = usbGetStringAscii(handle, dev->descriptor.iManufacturer, 0x0409, string, sizeof(string));
if (len < 0) {
errorCode = USB_ERROR_IO;
fprintf(stderr, "Warning: cannot query manufacturer for device: %s\n", usb_strerror());
} else {
errorCode = USB_ERROR_NOTFOUND;
/* fprintf(stderr, "seen device from vendor ->%s<-\n", string); */
if (strcmp(string, vendorName) == 0) {
len = usbGetStringAscii(handle, dev->descriptor.iProduct, 0x0409, string, sizeof(string));
if (len < 0) {
errorCode = USB_ERROR_IO;
fprintf(stderr, "Warning: cannot query product for device: %s\n", usb_strerror());
} else {
errorCode = USB_ERROR_NOTFOUND;
/* fprintf(stderr, "seen product ->%s<-\n", string); */
if (strcmp(string, productName) == 0) {
break;
}
}
}
}
usb_close(handle);
handle = NULL;
}
}
if (handle) {
break;
}
}
if (handle != NULL) {
errorCode = 0;
*device = handle;
}
return errorCode;
}
/**
* Test connection to the device. The test consists of writing 1000 random
* numbers to the device and checking the echo. This should discover systematic
* bit errors (e.g. in bit stuffing).
* \param handle Handle to talk to the device.
* \param argc Number of arguments.
* \param argv Arguments.
*/
void dev_test(usb_dev_handle *handle, int argc, char** argv) {
unsigned char buffer[8];
int nBytes;
int i, v, r;
if (argc != 2) {
usage(argv[0]);
exit(1);
}
for (i = 0; i < 1000; i++) {
v = rand() & 0xffff;
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CMD_ECHO, v, 0, (char *) buffer, sizeof(buffer), 5000);
if (nBytes < 2) {
if (nBytes < 0) {
fprintf(stderr, "USB error: %s\n", usb_strerror());
}
fprintf(stderr, "only %d bytes received in iteration %d\n", nBytes, i);
exit(1);
}
r = buffer[0] | (buffer[1] << 8);
if (r != v) {
fprintf(stderr, "data error: received 0x%x instead of 0x%x in iteration %d\n", r, v, i);
exit(1);
}
}
printf("test succeeded\n");
}
/**
* Set waves. It is possible to set any number of waves at once.
* \param handle Handle to talk to the device.
* \param argc Number of arguments.
* \param argv Arguments.
*/
void dev_set(usb_dev_handle *handle, int argc, char** argv) {
unsigned char buffer[8];
int nBytes;
int parameter;
if ((argc < 7) || ((argc - 2) % 5 != 0)) {
usage(argv[0]);
exit(1);
}
for (parameter = 2; (parameter + 4) < argc; parameter += 5) {
int ledId = atoi(argv[parameter + 0]);
if ((ledId < 0) || (ledId > (CHANNELS - 1))) {
fprintf(stderr, "invalid ledId: %d\n", ledId);
exit(1);
}
int waveId = atoi(argv[parameter + 1]);
if ((waveId < 0) || (waveId > 2)) {
fprintf(stderr, "invalid waveId: %d\n", waveId);
exit(1);
}
int waveformId = atoi(argv[parameter + 2]);
if ((waveformId < 0) || (waveformId > 38)) {
fprintf(stderr, "invalid waveformId: %d\n", waveformId);
exit(1);
}
int periodDuration = atoi(argv[parameter + 3]);
if ((periodDuration < 0) || (periodDuration > 255)) {
fprintf(stderr, "invalid periodDuration: %d\n", periodDuration);
exit(1);
}
int repetitionCount = atoi(argv[parameter + 4]);
if ((repetitionCount < 0) || (repetitionCount > 255)) {
fprintf(stderr, "invalid repetitionCount: %d\n", repetitionCount);
exit(1);
}
buffer[0] = CMD_SET;
buffer[1] = ledId;
buffer[2] = waveId;
buffer[3] = waveformId;
buffer[4] = periodDuration;
buffer[5] = repetitionCount;
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CMD_SET, ledId, 0, (char *) buffer, sizeof(buffer), 5000);
if (nBytes < 0) {
fprintf(stderr, "USB error: %s\n", usb_strerror());
exit(1);
}
}
}
/**
* Clear all waves on one LED.
* \param handle Handle to talk to the device.
* \param argc Number of arguments.
* \param argv Arguments.
*/
void dev_clear(usb_dev_handle *handle, int argc, char** argv) {
unsigned char buffer[8];
int nBytes;
if (argc != 3) {
usage(argv[0]);
exit(1);
}
int ledId = atoi(argv[2]);
if ((ledId < 0) || (ledId > (CHANNELS - 1))) {
fprintf(stderr, "invalid LED: %d\n", ledId);
exit(1);
}
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CMD_CLEAR, ledId, 0, (char *) buffer, sizeof(buffer), 5000);
if (nBytes < 0) {
fprintf(stderr, "USB error: %s\n", usb_strerror());
exit(1);
}
}
/**
* Get the status of the device. Status information is printed in detail.
* \param handle Handle to talk to the device.
* \param argc Number of arguments.
* \param argv Arguments.
*/
void dev_status(usb_dev_handle *handle, int argc, char** argv) {
int nBytes;
int i, j;
static fade_GlobalData fade_globalData; /* contains the state of all four LEDs. */
if (argc != 2) {
usage(argv[0]);
exit(1);
}
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, CMD_GET, 0, 0, (char *) &fade_globalData, sizeof(fade_globalData), 5000);
if (nBytes < 0) {
fprintf(stderr, "USB error: %s\n", usb_strerror());
exit(1);
}
if (nBytes != sizeof(fade_globalData)) {
fprintf(stderr, "USB oddity: %d bytes received, %d bytes expected.\n", nBytes, sizeof(fade_globalData));
exit(1);
}
for (i = 0; i < CHANNELS; i++) {
printf("LED %d %10s %10s %10s %10s %10s\n", i, "curid", "curvalue", "curpos", "currep", "nextupd");
printf(" %10d %10d %10d %10d %10d\n",
fade_globalData.led[i].waveCurrentId,
fade_globalData.led[i].waveCurrentValue,
fade_globalData.led[i].waveCurrentPosition,
fade_globalData.led[i].waveCurrentRepetition,
fade_globalData.led[i].waveNextUpdate);
printf("%10s %10s %10s %10s %10s %10s\n", "wave", "waveform", "length", "repeat", "duration", "updtime");
for (j = 0; j < 3; j++) {
printf("%10d %10d %10d %10d %10d %10d\n",
j,
fade_globalData.led[i].wave[j].waveformId,
fade_globalData.led[i].wave[j].waveformLength,
fade_globalData.led[i].wave[j].waveformRepetition,
fade_globalData.led[i].wave[j].waveformDuration,
fade_globalData.led[i].wave[j].waveformUpdateTime);
}
}
}
/**
* Reset the device.
* \param handle Handle to talk to the device.
* \param argc Number of arguments.
* \param argv Arguments.
*/
void dev_reset(usb_dev_handle *handle, int argc, char** argv) {
unsigned char buffer[8];
int nBytes;
if (argc != 2) {
usage(argv[0]);
exit(1);
}
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, CMD_RESET, 0, 0, (char *) buffer, sizeof(buffer), 5000);
if (nBytes < 0) {
fprintf(stderr, "USB error: %s\n", usb_strerror());
exit(1);
}
}
/**
* Show a waveform. This will not send a command to the device, the waveform is
* only printed on the screen.
* \param handle Handle to talk to the device (not needed).
* \param argc Number of arguments.
* \param argv Arguments.
*/
int dev_show(int argc, char **argv) {
if (argc != 3) {
usage(argv[0]);
exit(1);
}
int waveformId = atoi(argv[2]);
if ((waveformId < 0) || (waveformId > 38)) {
fprintf(stderr, "invalid waveformId: %d\n", waveformId);
exit(1);
}
int i, j;
int length = fade_calculateWaveform(waveformId, 0);
printf("wave %2d - length %2d\n", waveformId, length);
for (i = 31; i > 0; i--) {
printf("%2d: ", i);
for (j = 1; j <= length; j++) {
if (fade_calculateWaveform(waveformId, j) >= i) {
printf("*");
} else {
printf(" ");
}
}
printf("\n");
}
printf(" ");
for (j = 1; j <= length; j++) {
printf("=");
}
printf("\n");
exit(0);
}
/**
* Main function. Initializes the USB-device, parses commandline-parameters and
* calls the functions that communicate with the device.
* \param argc Number of arguments.
* \param argv Arguments.
* \return Error code.
*/
int main(int argc, char **argv)
{
usb_dev_handle *handle = NULL;
if (argc < 2) {
usage(argv[0]);
exit(1);
}
usb_init();
if (usbOpenDevice (&handle, USBDEV_SHARED_VENDOR, "www.schatenseite.de", USBDEV_SHARED_PRODUCT, "USB-LED-Fader") != 0) {
fprintf(stderr, "Could not find USB device \"USB-LED-Fader\" with vid=0x%x pid=0x%x\n", USBDEV_SHARED_VENDOR, USBDEV_SHARED_PRODUCT);
exit(1);
}
/* We have searched all devices on all busses for our USB device above. Now
* try to open it and perform the vendor specific control operations for the
* function requested by the user.
*/
if (strcmp(argv[1], "test") == 0) {
dev_test(handle, argc, argv);
} else if (strcmp(argv[1], "set") == 0) {
dev_set(handle, argc, argv);
} else if (strcmp(argv[1], "clear") == 0) {
dev_clear(handle, argc, argv);
} else if (strcmp(argv[1], "status") == 0) {
dev_status(handle, argc, argv);
} else if (strcmp(argv[1], "reset") == 0) {
dev_reset(handle, argc, argv);
} else if (strcmp(argv[1], "show") == 0) {
dev_reset(handle, argc, argv);
} else {
usage(argv[0]);
exit(1);
}
usb_close(handle);
return 0;
}

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#ifndef __channels_h_included__
#define __channels_h_included__
/**
* \file channels.h
* \brief Global definitions, used by the firmware and the commandline-client.
* \author Thomas Stegemann
* \version $Id: channels.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#define CHANNELS 4 /**< number of output channels */
#endif

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#ifndef __usbledfader_h_included__
#define __usbledfader_h_included__
/**
* \file usbledfader.h
* \brief Global definitions and datatypes, used by the firmware and the commandline-client. Also contains the main doxygen-documentation.
* \author Ronald Schaten & Thomas Stegemann
* \version $Id: usbledfader.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
/**
* \mainpage USB-LED-Fader
*
* \section sec_intro Introduction
*
* The USB-LED-Fader is a device to control a number of LEDs via USB. I built
* it to display the online-status of my internet-connection, the
* recording-status of my videorecorder, and warnings if the available
* disc-space is low. You can imagine an endless number of applications for
* this.
*
* The LEDs are controlled with pulse width modulation (PWM). That way, they
* are not only on or off, it is possible to control the brightness. Included
* in the device is a number of 'waveforms' that can be displayed on the LEDs.
* That way, one LED can display some kind of a sinus- or triangular wave
* without any interaction with the controlling host.
*
* Every LED can be controlled individually, each one can display it's own
* waveforms.
*
* You can assign three different waves to every LED: two 'eternal' waves (0 &
* 1). They are displayed alternating until anything different is required. The
* third wave (2) is only displayed once, afterwards the device will switch
* back to alternating between the first two waves.
*
* One wave is described by three parameters: the waveform, the duration for
* one repetition of the wave and the number of repetitions before switching to
* the next wave.
*
* This version supports four LEDs, it should be quite easy to change that
* number between one and eight. I have not tested any number greater than
* four, but I can imagine that the load on the controller can be too high to
* reliably communicate via USB.
*
* There are three parts included in the distribution: The firmware for an
* ATmega8 microcontroller, a commandline-client that can be run under Linux,
* and the circuits needed to build the device.
*
* This project is based on the PowerSwitch example application by Objective
* Development. Like that, it uses Objective Development's firmware-only USB
* driver for Atmel's AVR microcontrollers.
*
* Objective Development's USB driver is a firmware-only implementation of the
* USB 1.1 standard (low speed device) on cheap single chip microcomputers of
* Atmel's AVR series, such as the ATtiny2313 or even some of the small 8 pin
* devices. It implements the standard to the point where useful applications
* can be implemented. See the file "firmware/usbdrv/usbdrv.h" for features and
* limitations.
*
* \section sec_install Building and installing
*
* Both, the firmware and Unix command line tool are built with "make". You may
* need to customize both makefiles.
*
* \subsection sec_fw Firmware
*
* The firmware for this project requires avr-gcc and avr-libc (a C-library for
* the AVR controller). Please read the instructions at
* http://www.nongnu.org/avr-libc/user-manual/install_tools.html for how to
* install the GNU toolchain (avr-gcc, assembler, linker etc.) and avr-libc.
*
* Once you have the GNU toolchain for AVR microcontrollers installed, you can
* run "make" in the subdirectory "firmware". You may have to edit the Makefile
* to use your preferred downloader with "make program". The current version is
* built for avrdude with a parallel connection to an stk200-compatible
* programmer.
*
* If working with a brand-new controller, you may have to set the fuse-bits to
* use the external crystal:
*
* \code
* avrdude -p atmega8 -P /dev/parport0 -c sp12 -U hfuse:w:0xC9:m -U lfuse:w:0x9F:m
* \endcode
*
* Afterwards, you can compile and flash to the device:
*
* \code
* make program
* \endcode
*
* \subsection sec_client Commandline client
*
* The command line tool requires libusb. Please take the packages from your
* system's distribution or download libusb from http://libusb.sourceforge.net/
* and install it before you compile. Change to directory "commandline", check
* the Makefile and edit the settings if required and type
*
* \code
* make
* \endcode
*
* This will build the unix executable "usb-led-fader" which can be used to
* control the device.
*
* \section sec_usage Usage
*
* Connect the device to the USB-port. All LED should flash up to indicate that
* the device is initialized.
*
* Then use the commandline-client as follows:
*
* \code
* usb-led-fader status
* usb-led-fader set <ledId> <waveId> <waveformId> <periodDuration> <repetitionCount>
* usb-led-fader clear <ledId>
* usb-led-fader reset
* usb-led-fader show <waveformId>
* usb-led-fader test
* \endcode
*
* When using the set-function, it is possible to define several waves at once.
* You simply have to give the parameters for all waves. See examples below.
*
* \subsection sec_params Parameters
*
* - \e ledId: ID of the LED (0-n, depending on the number of LEDs in your
* circuit).
* - \e waveId: ID of the wave (0-1: constant waves, 2: override).
* - \e waveformId: ID of the waveform (0-31: brightness, 32-37: patterns). For
* a reference to the patterns, consult the function fade_calculateWaveform()
* in the file "firmware/main.c".
* - \e periodDuration: Time in sec/10 for one repetition of the waveform. A
* value of 0 can be used to reset the wave.
* - \e repetitionCount: Number of repetitions before switching to the next
* wave. A value of 0 can be used to repeat this forever.
*
* \subsection sec_examples Examples
*
* <b>Get the status of all LEDs:</b>
* \code
* usb-led-fader status
* \endcode
* This will result in an output similar to this:
* \code
* LED 0 curid curvalue curpos currep nextupd
* 0 2 26 0 23
* wave waveform length repeat duration updtime
* 0 38 32 1 20 45
* 1 0 1 1 0 1
* 2 0 1 1 0 1
* LED 1 curid curvalue curpos currep nextupd
* 0 14 19 0 19
* wave waveform length repeat duration updtime
* 0 38 32 1 20 45
* 1 0 1 1 0 1
* 2 0 1 1 0 1
* LED 2 curid curvalue curpos currep nextupd
* 0 31 16 0 43
* wave waveform length repeat duration updtime
* 0 38 32 1 20 45
* 1 0 1 1 0 1
* 2 0 1 1 0 1
* LED 3 curid curvalue curpos currep nextupd
* 0 6 9 0 39
* wave waveform length repeat duration updtime
* 0 38 32 1 20 45
* 1 0 1 1 0 1
* 2 0 1 1 0 1
* \endcode
* In this output, the values curvalue, curpos, nextupd and updtime are for
* debugging purposes only. They shouldn't be of interest to the common user.
* The meaning of the other values should be clear.
*
* <b>Set the first LED to keep a middle brightness:</b>
* \code
* usb-led-fader set 0 0 15 10 1
* \endcode
* So, on LED 0 the wave 0 is set to waveform 15. It will stay there for one
* second and will be repeated once before switching to the next wave. There is
* no next wave because we didn't define one, so this waveform will stay
* forever.
*
* <b>Now set a second wave on the first LED, a little brighter than the one
* before:</b>
* \code
* usb-led-fader set 0 1 25 10 1
* \endcode
* This is wave 1 on LED 0, waveform 25 indicates a constant level of
* brightness. After setting the second wave, it will alternate with the first
* one after every second, because both waves have the same duration and the
* same number of repetitions.
*
* <b>Set a third wave on the first LED:</b>
* \code
* usb-led-fader set 0 2 36 20 5
* \endcode
* This sets the third wave (wave 2) on the first LED. Waveform 36 is a nice
* sinus-like wave, so the LED starts to fade. One period of the fading takes 2
* seconds, it is repeated for 5 times. Since this is the third wave, after the
* repetitions the LED returns to alternating between wave 0 and wave 1, this
* wave is discarded.
*
* <b>Set multiple waves at once:</b>
* \code
* usb-led-fader set 0 0 15 10 1 0 1 25 10 1 0 2 36 20 5
* \endcode
* This will set all of the above waves at once. Thus, the first LED will first
* fade the sinus-wave five times, then start alternating between the two
* brightnesses in one-second-rhythm.
*
* <b>Clear the first LED:</b>
* \code
* usb-led-fader clear 0
* \endcode
* This will clear all three waves on the first LED.
*
* <b>Reset the device:</b>
* \code
* usb-led-fader reset
* \endcode
* All LEDs will flash once, to indicate that the device is reset and the LEDs
* are working.
*
* <b>Show a waveform on the screen:</b>
* \code
* usb-led-fader show 36
* \endcode
* This will lead to an output like the following:
* \code
* wave 36 - length 64
* 31: *****
* 30: *********
* 29: ***********
* 28: ***************
* 27: *****************
* 26: *******************
* 25: *******************
* 24: *********************
* 23: ***********************
* 22: *************************
* 21: *************************
* 20: ***************************
* 19: *****************************
* 18: *****************************
* 17: *******************************
* 16: *********************************
* 15: ***********************************
* 14: ***********************************
* 13: *************************************
* 12: ***************************************
* 11: ***************************************
* 10: *****************************************
* 9: *******************************************
* 8: *********************************************
* 7: *********************************************
* 6: ***********************************************
* 5: *************************************************
* 4: *****************************************************
* 3: *******************************************************
* 2: ***********************************************************
* 1: ****************************************************************
* ================================================================
* \endcode
* Keep in mind that the width of the displayed wave corresponds to the length
* of the waveform. If you display a very simple one like the constant
* brightness levels (0-31), the length is 1. Therefore only one column is
* displayed.
*
* <b>Test the device:</b>
* \code
* usb-led-fader test
* \endcode
* This function sends many random numbers to the device. The device returns
* the packages, and the client looks for differences in the sent and the
* received numbers.
*
* \section sec_drawbacks Drawbacks
*
* As mentioned above, controlling the PWM for several LEDs is a lot of work
* for one small microcontroller. Speaking the USB protocol is so, either. Both
* combined result in a lot of load on the device, so the communication with
* the device is not 100% reliable. More than 99% though, at least in our
* tests.
*
* <b>SO BE WARNED:</b> You should not use this device to control the state of
* your nuclear reactor. If you intend to use it in that way despite of this
* warning, please let me know... ;-)
*
*
* \section sec_files Files in the distribution
*
* - \e Readme.txt: The file you are currently reading.
* - \e firmware: Source code of the controller firmware.
* - \e firmware/usbdrv: USB driver -- See Readme.txt in this directory for
* info
* - \e commandline: Source code of the host software (needs libusb).
* - \e common: Files needed by the firmware and the commandline-client.
* - \e circuit: Circuit diagrams in PDF and EAGLE 4 format. A free version of
* EAGLE is available for Linux, Mac OS X and Windows from
* http://www.cadsoft.de/.
* - \e License.txt: Public license for all contents of this project, except
* for the USB driver. Look in firmware/usbdrv/License.txt for further info.
* - \e Changelog.txt: Logfile documenting changes in soft-, firm- and
* hardware.
*
* \section sec_thanks Thanks!
*
* I'd like to thank <b>Objective Development</b> for the possibility to use
* their driver for my project. In fact, this project wouldn't exist without
* the driver.
*
* And I'd like to give special credits to <b>Thomas Stegemann</b>. He wrote
* the PWM-stuff, and I guess it would have been nearly to impossible to me to
* write the rest of the project without his help since C isn't my natural
* language.
*
* \section sec_license About the license
*
* Our work - all contents except for the USB driver - are licensed under the
* GNU General Public License (GPL). A copy of the GPL is included in
* License.txt. The driver itself is licensed under a special license by
* Objective Development. See firmware/usbdrv/License.txt for further info.
*
* <b>(c) 2006 by Ronald Schaten - http://www.schatenseite.de</b>
*/
#include <stdint.h>
/* return codes for USB-communication */
#define msgOK 0 /**< Return code for OK. */
#define msgErr 1 /**< Return code for Error. */
/* These are the vendor specific SETUP commands implemented by our USB device */
#define CMD_ECHO 0 /**< Command to echo the sent data */
#define CMD_GET 1 /**< Command to fetch values */
#define CMD_SET 2 /**< Command to send values */
#define CMD_CLEAR 3 /**< Command to switch off a certain LED */
#define CMD_RESET 4 /**< Command to reset the whole device */
/** Description of one waveform. */
typedef struct S_fade_Waveform {
uint8_t waveformId; /**< ID of this waveform. */
uint8_t waveformLength; /**< Length of this waveform. */
uint8_t waveformRepetition; /**< How often is this waveform to be repeated? */
uint8_t waveformDuration; /**< Duration for one cycle of this waveform, stored for status-output. */
uint32_t waveformUpdateTime; /**< Time between two waveform-samples in calls of timerInterrupt(), calculated from waveformDuration. */
} fade_Waveform;
/** The state of one LED. */
typedef struct S_fade_LedState {
fade_Waveform wave[3]; /**< Three waveforms: base-function1, base-function2 and override-function. */
uint8_t waveCurrentId; /**< Which of the three waveforms is currently displayed? */
uint8_t waveCurrentValue; /**< The current brightness. */
uint8_t waveCurrentPosition; /**< Our position in the current waveform. */
uint8_t waveCurrentRepetition; /**< We are in the n-th repetition. */
int32_t waveNextUpdate; /**< Number of cycles till next update. */
} fade_LedState;
/** Contains the state of all four LEDs. */
typedef struct S_fade_GlobalData {
fade_LedState led[4]; /**< Data for four LEDs. */
} fade_GlobalData;
uint8_t fade_calculateWaveform(uint8_t waveformId, uint8_t waveformPosition);
/**
* Calculate a waveform. Returns either the length of a given waveform or the
* output-level at a certain position in the wave.
* \param waveformId ID of the waveform in question.
* \param waveformPosition 0 or position in the given waveform.
* \return If the waveformPosition is 0, the number of steps in this waveform is returned. Otherwise the resulting output-level, an integer between 0 and 31.
*/
uint8_t fade_calculateWaveform(uint8_t waveformId, uint8_t waveformPosition) {
/*
* values for sinus-wave, amplitude 31, 64 steps:
* awk 'BEGIN{ pi=3.1415927; for(i=1; i<=64; i++) { printf("%.0f, ", sin(i*pi/32)*31) } printf("\n"); }'
* 3, 6, 9, 12, 15, 17, 20, 22, 24, 26, 27, 29, 30, 30, 31, 31, 31, 30,
* 30, 29, 27, 26, 24, 22, 20, 17, 15, 12, 9, 6, 3, -0, -3, -6, -9,
* -12, -15, -17, -20, -22, -24, -26, -27, -29, -30, -30, -31, -31, -31,
* -30, -30, -29, -27, -26, -24, -22, -20, -17, -15, -12, -9, -6, -3, 0
*/
/* sinus-wave:
* awk 'BEGIN{ pi=3.1415927; for(i=1; i<=64; i++) { printf("%.0f, ", sin((i+48)*pi/32)*15+16) } printf("\n"); }'
*/
uint8_t sinus[] = { 1, 1, 2, 2, 3, 4, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16,
17, 19, 20, 22, 23, 24, 26, 27, 28, 28, 29, 30, 30, 31, 31, 31, 31, 31,
30, 30, 29, 28, 28, 27, 26, 24, 23, 22, 20, 19, 17, 16, 15, 13, 12, 10,
9, 8, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1 };
/*
* another nice wave, wider than the original sinus:
* awk 'BEGIN{ pi=3.1415927; for(i=1; i<=32; i++) { printf("%.0f, ", sqrt(sin(i*pi/32)*31+.00001)*sqrt(32)) } printf("\n"); }'
*/
uint8_t widecurve[] = { 10, 14, 17, 19, 22, 23, 25, 26, 28, 29, 30, 30, 31,
31, 31, 31, 31, 31, 31, 30, 30, 29, 28, 26, 25, 23, 22, 19, 17, 14, 10,
0 };
if (waveformId <= 31) {
/* No fading, just a constant level */
if (waveformPosition == 0) {
return 1;
} else {
return waveformId;
}
} else {
switch (waveformId) {
case 32: /* blink */
if (waveformPosition == 0) {
return 2;
} else {
if (waveformPosition == 1) {
return 31;
} else {
return 0;
}
}
case 33: /* triangular */
if (waveformPosition == 0) {
return 62;
} else {
if (waveformPosition <= 32) {
return waveformPosition - 1;
} else {
return 63 - waveformPosition;
}
}
case 34: /* sawtooth rising */
if (waveformPosition == 0) {
return 32;
} else {
return waveformPosition - 1;
}
case 35: /* sawtooth falling */
if (waveformPosition == 0) {
return 32;
} else {
return 31 - (waveformPosition - 1);
}
case 36: /* sinus */
if (waveformPosition == 0) {
return 64;
} else {
return sinus[waveformPosition - 1];
}
case 37: /* wide curve */
if (waveformPosition == 0) {
return 32;
} else {
return widecurve[waveformPosition - 1];
}
case 38: /* wide curve - inverted */
if (waveformPosition == 0) {
return 32;
} else {
return 31 - widecurve[(waveformPosition + 15) % 32];
}
}
}
return 0;
}
#endif

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# $Id: Makefile,v 1.1 2006/09/26 18:18:27 rschaten Exp $
AVRDUDE = avrdude -p atmega8 -P /dev/parport0 -c stk200
COMPILE = avr-gcc -Wall -Os -Iusbdrv -I../common -I. -mmcu=atmega8 #-DDEBUG_LEVEL=2
# NEVER compile the final product with debugging! Any debug output will
# distort timing so that the specs can't be met.
OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o pwm_timer.o pwm_channels.o message_queue.o
# Note that we link usbdrv.o first! This is required for correct alignment of
# driver-internal global variables!
# symbolic targets:
all: main.hex
.c.o:
$(COMPILE) -c $< -o $@
.S.o:
$(COMPILE) -x assembler-with-cpp -c $< -o $@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.
.c.s:
$(COMPILE) -S $< -o $@
program: all
$(AVRDUDE) -E noreset,vcc -U flash:w:main.hex
clean:
rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o usbdrv/*.o main.s usbdrv/oddebug.s usbdrv/usbdrv.s
# file targets:
main.bin: $(OBJECTS)
$(COMPILE) -o main.bin $(OBJECTS)
main.hex: main.bin
rm -f main.hex main.eep.hex
avr-objcopy -j .text -j .data -O ihex main.bin main.hex
disasm: main.bin
avr-objdump -d main.bin
cpp:
$(COMPILE) -E main.c

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#ifndef boolean_h
#define boolean_h
/**
* \file boolean.h
* \brief Provides boolean variables in C.
* \author Thomas Stegemann
* \version $Id: boolean.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
/** Possible boolean values */
typedef enum E_Boolean {
False = 0, /**< logical false */
True = 1 /**< logical true */
} Boolean;
/**
* Boolean function. Returns true or false, depending on the given condition.
* \param condition The condition to evaluate, must be integer.
* \return True or false.
*/
static inline Boolean
boolean (int condition)
{
if (condition) {
return True;
} else {
return False;
}
}
#endif

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#ifndef config_message_queue_h
#define config_message_queue_h
/**
* \file config_message_queue.h
* \brief Configures the message-queue.
* \author Thomas Stegemann
* \version $Id: config_message_queue.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - define the size of the messageQueue(messageQueue_Size) and the type of the
* messageQueue_QueuedMessage
* - check that messageQueue_SizeType can hold 0..messageQueue_Size+1
* - the messageQueue buffers up to messageQueue_Size messages of the type
* messageQueue_QueuedMessage
* - currently the messageQueue is used by pwm_Channels and pwm_Timer with the
* pwm_Channels_Message
*/
#include "pwm_timer.h"
typedef pwm_Channels_Message messageQueue_QueuedMessage;
enum { messageQueue_Size = 3 };
#endif

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#ifndef config_message_queue_impl_h
#define config_message_queue_impl_h
/**
* \file config_message_queue_impl.h
* \brief Configures the implementation of the message-queue.
* \author Thomas Stegemann
* \version $Id: config_message_queue_impl.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - define the SizeType for the messageQueue
* - the messageQueue_SizeType must hold 0..messageQueue_Size + 1, see
* config_message_queue.h
* - the messageQueue_SizeType must be read/written by the processor in an
* atomic instruction
*/
#include <stdint.h>
typedef uint8_t messageQueue_SizeType;
#endif

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#ifndef config_pwm_timer_impl_h
#define config_pwm_timer_impl_h
/**
* \file config_pwm_timer_impl.h
* \brief Configures the implementation of the PWM-timer.
* \author Thomas Stegemann
* \version $Id: config_pwm_timer_impl.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - pwm_Timer_Cycles_Max defines the number of (prescaled) processor cycles
* for a full pwm_TimerCycle
* - pwm_Timer_Cycles_ReadMin defines the number of (prescaled) processor
* cycles the reading from the message queue may last
* - pwm_Timer_Cycles_SleepMax defines the minimum number of (prescaled)
* processor cycles for which the timer is used. for less cycles the
* pwm_Timer waits active
*/
#include "pwm_channels.h"
enum { pwm_Timer_Cycles_Max = pwm_Channels_Brightness_Max * pwm_Channels_Brightness_Max };
enum { pwm_Timer_Cycles_ReadMin = 2 };
enum { pwm_Timer_Cycles_SleepMax = 2 };
#endif

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/**
* \file main.c
* \brief Firmware for the USB-LED-Fader.
* \author Ronald Schaten & Thomas Stegemann
* \version $Id: main.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "usbdrv.h"
#include "oddebug.h"
#include "pwm_channels.h"
#include "usbledfader.h"
#include "channels.h"
/** Global variable, contains the state of all four LEDs. */
static fade_GlobalData fade_globalData;
/** Global variable, contains the rest-amount of data to send to the host. */
static uint8_t usbRead;
/**
* Handler for the timer-interrupt. Determines the state of the four LEDs and
* calls pwm_Channels_show() if something is to be changed. This function
* contains the logic by which the waveforms are assigned to the LEDs.
*/
static void timerInterrupt(void)
{
uint8_t i = 0, changed = 0;
for (i = 0; i < CHANNELS; i++) {
fade_LedState *pLed = &(fade_globalData.led[i]); /* fetch current LED */
pLed->waveNextUpdate--;
if (pLed->waveNextUpdate <= 0) { /* time to update */
fade_Waveform *pWave = &(pLed->wave[pLed->waveCurrentId]); /* fetch currently active wave */
pLed->waveCurrentPosition++; /* go to next position */
if (pLed->waveCurrentPosition > pWave->waveformLength) {
pLed->waveCurrentPosition = 1; /* restart wave */
if (pWave->waveformRepetition == 0) {
/* repeat this waveform forever */
} else {
/* next repetition */
pLed->waveCurrentRepetition++;
if (pLed->waveCurrentRepetition >= pWave->waveformRepetition) { /* enough of this wave */
pLed->waveCurrentRepetition = 0; /* reset repetition counter */
switch (pLed->waveCurrentId) { /* activate next wave */
case 0:
if (pLed->wave[1].waveformDuration > 0) { /* only activate if a wave is set */
pLed->waveCurrentId = 1;
}
break;
case 1:
if (pLed->wave[0].waveformDuration > 0) { /* only activate if a wave is set */
pLed->waveCurrentId = 0;
}
break;
case 2:
/* wave 2 is only to be repeated the given times,
* reset and continue with wave 0 */
pWave->waveformId = 0;
pWave->waveformLength = fade_calculateWaveform(pWave->waveformId, 0);
pWave->waveformRepetition = 1;
pWave->waveformDuration = 0;
pWave->waveformUpdateTime = 1;
pLed->waveCurrentId = 0;
break;
}
}
}
}
uint8_t newValue = fade_calculateWaveform(pLed->wave[pLed->waveCurrentId].waveformId, pLed->waveCurrentPosition); /* fetch new value */
if (newValue != pLed->waveCurrentValue) { /* only update if the value has changed */
pLed->waveCurrentValue = newValue;
changed = 1;
}
pLed->waveNextUpdate = pLed->wave[pLed->waveCurrentId].waveformUpdateTime; /* next update according to the wave's settings */
}
}
if (changed) { /* any value has changed, update all LEDs */
pwm_Channels channels;
for (i = 0; i < CHANNELS; i++) {
channels.channel[i] = fade_globalData.led[i].waveCurrentValue;
}
pwm_Channels_show(channels);
}
}
/**
* Start displaying a certain waveform on a single LED.
* \param ledId ID of the LED that is changed.
* \param waveId ID of the wave that to be set: 0 and 1 are the base waves, 2 is the override wave.
* \param waveformId ID of the Waveform that is to be assigned to the LED.
* \param periodDuration How long should this wave stay on display? Time in seconds/10.
* \param repetitionCount How many times should this wave be repeated while it is on display?
*/
void fade_startWaveform(uint8_t ledId, uint8_t waveId, uint8_t waveformId, uint8_t periodDuration, uint8_t repetitionCount) {
if ((ledId < CHANNELS) && (waveId < 3)) {
fade_LedState *pLed = &(fade_globalData.led[ledId]);
fade_Waveform *pWave = &(pLed->wave[waveId]);
pLed->waveCurrentId = waveId;
pLed->waveCurrentPosition = 0;
pLed->waveCurrentRepetition = 0;
pLed->waveNextUpdate = 0;
if (periodDuration > 0) {
pWave->waveformId = waveformId;
pWave->waveformLength = fade_calculateWaveform(waveformId, 0);
pWave->waveformRepetition = repetitionCount;
pWave->waveformDuration = periodDuration;
/* waveformUpdateTime in calls of timerInterrupt().
* periodDuration in seconds/10.
* 12000000 cycles per second
* 64 cycles per timer/counter (prescaler)
* 256 timer/counter per interrupt-call
* -> (12000000 / (256 * 64)) = 732 calls per second */
pWave->waveformUpdateTime = ((uint32_t)periodDuration * 12000000 / 256 / 64 / 10 / pWave->waveformLength );
} else {
/* periodDuration = 0, reset the wave */
pWave->waveformId = 0;
pWave->waveformLength = fade_calculateWaveform(pWave->waveformId, 0);
pWave->waveformRepetition = 1;
pWave->waveformDuration = 0;
pWave->waveformUpdateTime = 1;
}
}
}
/**
* Fills fade_globalData. The state of all LEDs is initialized to off. One
* signal is displayed on all LEDs to ensure they're working.
*/
void fade_globalData_init(void) {
int i = 0, j = 0;
for (i = 0; i < CHANNELS; i++) {
fade_globalData.led[i].waveCurrentId = 0;
fade_globalData.led[i].waveCurrentPosition = 0;
fade_globalData.led[i].waveCurrentRepetition = 0;
fade_globalData.led[i].waveNextUpdate = 0;
for (j = 0; j < 3; j++) {
fade_globalData.led[i].wave[j].waveformId = 0;
fade_globalData.led[i].wave[j].waveformLength =
fade_calculateWaveform(fade_globalData.led[i].wave[j].
waveformId, 0);
fade_globalData.led[i].wave[j].waveformRepetition = 1;
fade_globalData.led[i].wave[j].waveformDuration = 0;
fade_globalData.led[i].wave[j].waveformUpdateTime = 1;
}
}
/* show that we are ready */
for (i = 0; i < CHANNELS; i++) {
fade_startWaveform(i, 2, 36, 10, 1);
}
}
/**
* USB-Data-Handler (device -> host). Handles data that is to be sent to the
* host via USB-Interface. In our case the data contains the current settings
* for the LEDs. This function is called until the returned length is shorter
* than the buffer (typically 8 bytes).
* \param data Buffer for the data.
* \param len Length of the buffer.
* \return Length of the returned buffer.
*/
uchar usbFunctionRead(uchar *data, uchar len) {
uint8_t i = 0;
uint8_t *p_fade_globalData = (uint8_t*)&fade_globalData;
while ((i < len) && (usbRead < sizeof(fade_GlobalData))) {
data[i] = p_fade_globalData[usbRead];
usbRead++;
i++;
}
return i;
}
/**
* USB-Data-Handler (host -> device). Handles data that is received from the
* USB-Interface. In our case the data contains settings for the LEDs.
* \param data The received data, up to 8 bytes.
* \param len Length of the received data.
* \return 1 if we have received the entire payload successfully, 0 if we expect more data. We don't, so we always return 1.
*/
uchar usbFunctionWrite(uchar *data, uchar len) {
/* parameters:
* data[0]: command (0: echo, 1: read status, 2: set status, 3: clear)
* data[1]: ledId
* data[2]: waveId
* data[3]: waveformId
* data[4]: periodDuration
* data[5]: repetitionCount
*/
fade_startWaveform(data[1], data[2], data[3], data[4], data[5]);
return 1;
}
/**
* USB-Setup-Handler. Handles setup-calls that are received from the
* USB-Interface.
* \param data Eight bytes of data.
* \return The number of returned bytes (in replyBuffer[]).
*/
uchar usbFunctionSetup(uchar data[8]) {
int i;
static uchar replyBuffer[8];
uchar replyLength;
replyBuffer[0] = msgOK;
switch (data[1]) {
case CMD_ECHO: /* echo */
replyBuffer[0] = data[2];
replyBuffer[1] = data[3];
replyLength = 2;
break;
case CMD_GET: /* read status */
usbRead = 0;
replyLength = 0xff; /* special value, indicates that usbFunctionRead() has to be called */
break;
case CMD_SET: /* set status */
replyLength = 0xff; /* special value, indicates that usbFunctionWrite() has to be called */
break;
case CMD_CLEAR: /* clear one LED */
for (i = 0; i <= 2; i++) {
/* clear all three waves on this LED */
fade_startWaveform(data[2], i, 0, 0, 0);
}
replyLength = 1;
break;
case CMD_RESET: /* reset the device */
fade_globalData_init();
replyLength = 1;
break;
default: /* WTF? */
replyBuffer[0] = msgErr;
replyLength = 1;
break;
}
usbMsgPtr = replyBuffer;
return replyLength;
}
/**
* Main-function. Initializes the hardware and starts the main loop of the
* application.
* \return An integer. Whatever... :-)
*/
int main(void) {
uchar i, j;
odDebugInit();
DDRB = ~0; /* output SE0 for USB reset */
PORTB = 0x00; /* no pullups on USB pins */
DDRC = 0xff; /* all outputs */
PORTC = 0x00;
DDRD = 0x00; /* all inputs */
PORTD = 0x00;
j = 0;
while (--j) { /* USB Reset by device only required on Watchdog Reset */
i = 0;
while (--i); /* delay >10ms for USB reset */
}
DDRB = ~USBMASK; /* all outputs except USB data */
TCCR0 = 3; /* set prescaler to 1/64 */
usbInit();
sei();
pwm_Channels_init();
fade_globalData_init();
while (1) { /* main event loop */
usbPoll();
if (TIFR & (1 << TOV0)) {
TIFR |= 1 << TOV0; /* clear pending flag */
timerInterrupt();
}
}
return 0;
}

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/**
* \file message_queue.c
* \brief A message queue used to exchange messages between two concurrent threads.
* \author Thomas Stegemann
* \version $Id: message_queue.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#include <stdint.h>
#include "message_queue.h"
#include "config_message_queue_impl.h"
/** Structure of the global data of the queue */
typedef struct S_messageQueue_GlobalData {
messageQueue_QueuedMessage queue[messageQueue_Size]; /**< the queue itself */
messageQueue_SizeType begin; /**< the current start of the queue */
messageQueue_SizeType end; /**< the current end of the queue */
} messageQueue_GlobalData;
/** Global data of the queue */
static volatile messageQueue_GlobalData m_data;
/**
* Get the next entry fron the queue.
* \param value Number of the current entry.
* \return 0 if the value is larger than the queue, otherwise the next entry.
*/
static inline messageQueue_SizeType messageQueue_next(messageQueue_SizeType value) {
value++;
if(value >= messageQueue_Size) {
value= 0;
}
return value;
}
/**
* Initialize the queue.
*/
void messageQueue_init(void) {
m_data.begin= 0;
m_data.end= 0;
}
/**
* Clean up the queue. Currently this does nothing.
*/
void messageQueue_cleanup(void)
{}
/**
* Test if the queue is empty.
* \return True if it is empty, otherwise false.
*/
Boolean messageQueue_isEmpty(void) {
return boolean(m_data.begin == m_data.end);
}
/**
* Test if the queue is full. If it is full, new entries will overwrite the
* first entries.
* \return True if it is full, otherwise false.
*/
Boolean messageQueue_isFull(void) {
return boolean(messageQueue_next(m_data.end) == m_data.begin);
}
/**
* Read a message from the queue.
* \param pMessage Pointer to a message variable that should be set to the
* message.
* \return True if an entry could be read, otherwise false.
*/
Boolean messageQueue_read(messageQueue_QueuedMessage* pMessage) {
Boolean success= !messageQueue_isEmpty();
if(success) {
*pMessage= m_data.queue[m_data.begin];
m_data.begin= messageQueue_next(m_data.begin);
}
return success;
}
/**
* Write a message to the queue.
* \param message The message to append.
* \return True if the message could be appended, otherwise false.
*/
Boolean messageQueue_write(messageQueue_QueuedMessage message) {
Boolean success= !messageQueue_isFull();
if(success) {
m_data.queue[m_data.end]= message;
m_data.end= messageQueue_next(m_data.end);
}
return success;
}

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#ifndef message_queue_h
#define message_queue_h
/**
* \file message_queue.h
* \brief A message queue used to exchange messages between two concurrent
* threads.
* \author Thomas Stegemann
* \version $Id: message_queue.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - exchange messages between two concurrent threads (e.g.: main thread and
* interrupt calls)
* - before using any other function of the messageQueue, init must be called
* - one thread must be data source (use isFull and write)
* - the other thread must be the data sink (use isEmpty and read)
* - two concurrent threads must not use both the write functions and two
* concurrent threads must not use both the read functions
* - read/write return True on success and False if the message could not be
* read/written because the queue is empty/full
* - the size of the messageQueue and the type of the
* messageQueue_QueuedMessage are defined in config_message_queue.h
* - only one messageQueue can be used in a project
*/
#include "boolean.h"
#include "config_message_queue.h"
void messageQueue_init (void);
void messageQueue_cleanup(void);
Boolean messageQueue_isEmpty(void);
Boolean messageQueue_isFull (void);
Boolean messageQueue_read (messageQueue_QueuedMessage* pMessage);
Boolean messageQueue_write (messageQueue_QueuedMessage message);
#endif

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/**
* \file pwm_channels.c
* \brief Manages the values of the displayed channels.
* \author Thomas Stegemann
* \version $Id: pwm_channels.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#include <stdlib.h>
#include "pwm_channels.h"
#include "pwm_timer.h"
#include "config_pwm_timer_impl.h"
#include "message_queue.h"
/** Structure to contain the state of one channel */
typedef struct S_pwm_Channels_ChannelBrightness {
pwm_Channels_Bitfield field; /**< Bitfield resembling one channel */
pwm_Timer_Cycles cycle; /**< Number of on-cycles */
} pwm_Channels_ChannelBrightness;
/**
* Initialize channels. Basically, only the PWM-timer is started.
*/
void pwm_Channels_init(void) {
pwm_Timer_init();
}
/**
* Clean up channels. Basically, the PWM-timer gets cleaned.
*/
void pwm_Channels_cleanup(void) {
pwm_Timer_cleanup();
}
/**
* Calculate the Channels_Message. Requires the channel-list to be sorted by
* cycles.
* \param channels Array of the channels.
* \return Current message.
*/
static pwm_Channels_Message pwm_Channels_Message_get(pwm_Channels_ChannelBrightness channels[CHANNELS]) {
int j;
pwm_Channels_StepCounter i= 0;
pwm_Channels_Message message;
message.step[i].field = 0;
for (j = 0; j < CHANNELS; j++) {
message.step[i].field |= channels[j].field;
}
message.step[i].cycle= 0;
for (j = 0; j < CHANNELS; j++) {
if(channels[j].cycle == message.step[i].cycle) {
message.step[i].field&= ~channels[j].field;
} else {
message.step[i].cycle= channels[j].cycle;
i++;
message.step[i]= message.step[i-1];
message.step[i].field&= ~channels[j].field;
}
}
message.step[i].cycle= pwm_Timer_Cycles_Max;
return message;
}
/**
* Calculate number of cycles from a brightness.
* \param brightness The brightness.
* \return The number of cycles.
*/
pwm_Timer_Cycles pwm_Channels_BrightnessToCycles(pwm_Channels_Brightness brightness) {
return brightness * brightness;
}
/**
* Compare the number of cycles in two channels. This is needed for the
* qsort-call in pwm_Channels_show().
* \param cmp1 First channel.
* \param cmp2 Second channel.
* \return A value <0 if cmp1 is smaller than cmp2, 0 if they are of the same
* length and a value >0 if cmp1 is larger than cmp2.
*/
int pwm_Channels_CompareChannels(const void * cmp1, const void * cmp2) {
return ((const pwm_Channels_ChannelBrightness*)cmp1)->cycle - ((const pwm_Channels_ChannelBrightness*)cmp2)->cycle;
}
/**
* Writes the current pattern to the message-queue. The pattern is built from
* the state of all channels.
* \param channels Array with the channel-states.
*/
void pwm_Channels_show(pwm_Channels channels) {
int i;
pwm_Channels_Message message;
pwm_Channels_ChannelBrightness channel_brightness[CHANNELS];
for (i = 0; i < CHANNELS; i++) {
channel_brightness[i].field = 1 << i; // 1 << i equals 2^i
channel_brightness[i].cycle = pwm_Channels_BrightnessToCycles(channels.channel[i]);
}
qsort(channel_brightness, CHANNELS, sizeof(pwm_Channels_ChannelBrightness), pwm_Channels_CompareChannels);
message= pwm_Channels_Message_get(channel_brightness);
while(!messageQueue_write(message)) {
pwm_Timer_idle();
}
}

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#ifndef pwm_Channels_h
#define pwm_Channels_h
/**
* \file pwm_channels.h
* \brief Manages the values of the displayed channels.
* \author Thomas Stegemann
* \version $Id: pwm_channels.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - display the specified channels for a cycle of pwm_timer
* - before using the function show, init must be called
* - for every cycle of pwm_timer, show must be called
* - show buffers the selected channels, so it returns immediatly, as long as
* the internal buffer is not full
* - when the buffer is full the function blocks until another pwm_timer cycle
* has processed the current channels
*/
#include <stdint.h>
#include "channels.h"
/** Type to contain the brightness of one channel. */
typedef uint8_t pwm_Channels_Brightness;
/** Definition of the maximum brightness. */
enum { pwm_Channels_Brightness_Max = 31 };
/** Structure to contain the state of several channels. */
typedef struct S_pwm_Channels {
pwm_Channels_Brightness channel[CHANNELS]; /**< Array of channels. */
} pwm_Channels;
void pwm_Channels_init(void);
void pwm_Channels_cleanup(void);
void pwm_Channels_show(pwm_Channels channels);
#endif

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/**
* \file pwm_timer.c
* \brief Controls the actual PWM-output.
* \author Thomas Stegemann
* \version $Id: pwm_timer.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "boolean.h"
#include "message_queue.h"
#include "pwm_timer.h"
#include "config_pwm_timer_impl.h"
/** Structure to contain the global data for the timer. */
typedef struct S_pwm_Timer_GlobalData {
pwm_Channels_Message message[2]; /**< Array of two messages */
pwm_Channels_Message* pActive; /**< Pointer to the active message */
pwm_Channels_Message* pRead; /**< Pointer to the message to read */
pwm_Channels_StepCounter step; /**< Current step in the cycle */
pwm_Timer_Cycles currentCycle; /**< Current cycle */
Boolean readDone; /**< Indicates if something is read from the queue */
} pwm_Timer_GlobalData;
static pwm_Timer_GlobalData m_data; /**< Global data for the timer. */
/**
* Initialize the PWM-Timer. Sets basic values, starts the timer and
* initializes output-pins.
*/
void pwm_Timer_init(void) {
messageQueue_init();
m_data.step= 0;
m_data.currentCycle= 0;
m_data.pActive= &m_data.message[0];
m_data.pRead= &m_data.message[1];
m_data.readDone= False;
m_data.pActive->step[0].cycle= pwm_Channels_Brightness_Max;
m_data.pActive->step[0].field= 0;
/* clk/64 prescaling, CTC mode */
/* enable timer1 overflow (=output compare 1a) */
TCCR1B= _BV(CS11) | _BV(CS10) | _BV(WGM12);
TCCR1A= 0;
TIMSK|= _BV(OCIE1A);
/* load initial delay */
OCR1A= pwm_Timer_Cycles_Max;
/* initialize output pin */
DDRC = (1 << CHANNELS) - 1; // set all used channel-pins to output
PORTC = 0;
sei();
}
/**
* Clean up the timer. Basically, the message-queue is cleaned.
*/
void pwm_Timer_cleanup(void) {
messageQueue_cleanup();
}
/**
* Do nothing.
*/
void pwm_Timer_idle(void)
{}
/**
* Sleeps the required number of cycles. There are two possible ways of
* sleeping: 'active' and 'passive'. If we are required to sleep less than the
* number of cycles defined in pwm_Timer_Cycles_SleepMax, we execute an empty
* loop until we are ready (active sleeping). Otherwise, we set the timer to
* wake us after the given number of cycles (passive sleeping).
* \param sleep Number of cycles.
* \return True if we slept 'actively' (doing the while-loop), otherwise false.
*/
static Boolean pwm_Timer_sleep(pwm_Timer_Cycles sleep) {
Boolean sleepDone= False;
if((sleep < pwm_Timer_Cycles_SleepMax)) {
while (TCNT1 < sleep)
{}
sleepDone= True;
} else {
OCR1A= sleep;
}
return sleepDone;
}
/**
* Switch the output-pins to the given pattern.
* \param field 8-bit output-pattern.
*/
static void pwm_Timer_switchLed(pwm_Channels_Bitfield field) {
PORTC= field;
}
/**
* Timer interrupt routine. Determines the pattern to set and handles the times
* to do PWM.
*/
SIGNAL(SIG_OUTPUT_COMPARE1A) {
pwm_Timer_Cycles sleep= pwm_Timer_Cycles_Max;
OCR1A= pwm_Timer_Cycles_Max;
sei();
do {
if((m_data.step == pwm_Channels_StepCounter_Max) || (m_data.currentCycle == pwm_Timer_Cycles_Max)) {
if(m_data.readDone) {
pwm_Channels_Message* pSwap= m_data.pActive;
m_data.pActive= m_data.pRead;
m_data.pRead= pSwap;
m_data.readDone= False;
m_data.currentCycle= 0;
m_data.step= 0;
sleep= 0;
} else {
/* error could not read a new channels message in a whole cycle */
/* wait a complete cycle for the next message */
//sleep= pwm_Timer_Cycles_Max;
m_data.currentCycle= 0;
m_data.step= 0;
sleep= 0;
}
} else {
pwm_Timer_switchLed(m_data.pActive->step[m_data.step].field);
sleep= m_data.pActive->step[m_data.step].cycle - m_data.currentCycle;
m_data.currentCycle= m_data.pActive->step[m_data.step].cycle;
m_data.step++;
}
} while(pwm_Timer_sleep(sleep));
if(!m_data.readDone && (sleep > pwm_Timer_Cycles_ReadMin)) {
if(messageQueue_read(m_data.pRead)) {
m_data.readDone= True;
}
}
}

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#ifndef pwm_timer_h
#define pwm_timer_h
/**
* \file pwm_timer.h
* \brief Controls the actual PWM-output.
* \author Thomas Stegemann
* \version $Id: pwm_timer.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*
* License: See documentation.
*
* - read and process the pwm_Channels_Message from the messageQueue (written
* by pwm_Channels)
* - use a timed interrupt to switch the led at a specified processor cycle
* - init starts the processing and the timer
* - idle is called by the pwm_Channels when the internal buffer is full
* - at every pwm_timer cycle the leds can be switched in up to four steps
* every step defines which leds are switched on/off and up to which
* processor cycle the status is hold so the brightness for the three leds
* can be switched independently
* - example:
* - start with all leds for 10 cycles:
* \code
* step[0]= {10, 1|2|4};
* \endcode
* - switch off the red led for further 10 cycles
* \code
* step[1]= {20, 2|4};
* \endcode
* - switch off the green led for further 10 cycles
* \code
* step[2]= {30, 4};
* \endcode
* - switch off all leds for the remaining time
* \code
* step[3]= {pwm_Timer_Cycles_Max, 0};
* \endcode
*/
#include "pwm_channels.h"
/** 8-bit-field to contain the state of the channels. */
typedef uint8_t pwm_Channels_Bitfield;
/** Value to count the steps in one channel. */
typedef uint8_t pwm_Channels_StepCounter;
/** Contains a number of controller-cycles. */
typedef uint16_t pwm_Timer_Cycles;
/** Definition of the maximum number of steps. */
enum{pwm_Channels_StepCounter_Max= CHANNELS + 1};
/** Structure to contain one step. */
typedef struct S_pwm_Channels_Step {
pwm_Timer_Cycles cycle; /**< Number of cycles to complete this step. */
pwm_Channels_Bitfield field; /**< The state of all channels. */
} pwm_Channels_Step;
/** Structure to contain an array of steps. */
typedef struct S_pwm_Channels_Message {
pwm_Channels_Step step[pwm_Channels_StepCounter_Max]; /**< Array of steps. */
} pwm_Channels_Message;
void pwm_Timer_init(void);
void pwm_Timer_cleanup(void);
void pwm_Timer_idle(void);
#endif

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/* Name: usbconfig.h
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2005-04-01
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbconfig.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#ifndef __usbconfig_h_included__
#define __usbconfig_h_included__
/**
* \file usbconfig.h
* \brief Configuration of the USB-driver.
* \version $Id: usbconfig.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
/*
General Description:
This file contains parts of the USB driver which can be configured and can or
must be adapted to your hardware.
Please note that the usbdrv contains a usbconfig-prototype.h file now. We
recommend that you use that file as a template because it will always list
the newest features and options.
*/
/* ---------------------------- Hardware Config ---------------------------- */
#define USB_CFG_IOPORTNAME B
/* This is the port where the USB bus is connected. When you configure it to
* "PORTB", the registers PORTB, PINB (=PORTB-2) and DDRB (=PORTB-1) will be
* used.
*/
#define USB_CFG_DMINUS_BIT 0
/* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
* This MUST be bit 0 or 7. All other values will result in a compile error!
*/
#define USB_CFG_DPLUS_BIT 1
/* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
* This may be any bit in the port. Please note that D+ must also be connected
* to interrupt pin INT0!
*/
/* #define USB_CFG_PULLUP_IOPORTNAME B */
/* This is the port where the USB D- pullup resistor is connected. When you
* configure it to "PORTB", the registers PORTB and DDRB (=PORTB-1) will be
* used. If this constant is defined, the macros usbDeviceConnect() and
* usbDeviceDisconnect will be available.
*/
/* #define USB_CFG_PULLUP_BIT 2 */
/* This is the bit number in USB_CFG_PULLUP_IOPORT where the USB D- 1.5 kOhm
* pullup resistor is connected instead of VBUS. This may be any bit in
* the port.
*/
/* --------------------------- Functional Range ---------------------------- */
#define USB_CFG_HAVE_INTRIN_ENDPOINT 0
/* Define this to 1 if you want to compile a version with two endpoints: The
* default control endpoint 0 and an interrupt-in endpoint 1.
*/
#define USB_CFG_IMPLEMENT_HALT 0
/* Define this to 1 if you also want to implement the ENDPOINT_HALT feature
* for endpoint 1 (interrupt endpoint). Although you may not need this feature,
* it is required by the standard. We have made it a config option because it
* bloats the code considerably.
*/
#define USB_CFG_INTR_POLL_INTERVAL 10
/* If you compile a version with endpoint 1 (interrupt-in), this is the poll
* interval. The value is in milliseconds and must not be less than 10 ms for
* low speed devices.
*/
#define USB_CFG_IS_SELF_POWERED 1
/* Define this to 1 if the device has its own power supply. Set it to 0 if the
* device is powered from the USB bus.
*/
#define USB_CFG_MAX_BUS_POWER 20
/* Set this variable to the maximum USB bus power consumption of your device.
* The value is in milliamperes. [It will be divided by two since USB
* communicates power requirements in units of 2 mA.]
*/
#define USB_CFG_SAMPLE_EXACT 0
/* This variable affects Sampling Jitter for USB receiving. When it is 0, the
* driver guarantees a sampling window of 1/2 bit. The USB spec requires
* that the receiver has at most 1/4 bit sampling window. The 1/2 bit window
* should still work reliably enough because we work at low speed. If you want
* to meet the spec, set this value to 1. This will unroll a loop which
* results in bigger code size.
* If you have problems with long cables, try setting this value to 1.
*/
#define USB_CFG_IMPLEMENT_FN_WRITE 1
/* Set this to 1 if you want usbFunctionWrite() to be called for control-out
* transfers. Set it to 0 if you don't need it and want to save a couple of
* bytes.
*/
#define USB_CFG_IMPLEMENT_FN_READ 1
/* Set this to 1 if you need to send control replies which are generated
* "on the fly" when usbFunctionRead() is called. If you only want to send
* data from a static buffer, set it to 0 and return the data from
* usbFunctionSetup(). This saves a couple of bytes.
*/
/* -------------------------- Device Description --------------------------- */
#define USB_CFG_VENDOR_ID 0xc0, 0x16 /* 5824 in dec, stands for VOTI */
/* USB vendor ID for the device, low byte first. If you have registered your
* own Vendor ID, define it here. Otherwise you use obdev's free shared
* VID/PID pair. Be sure to read USBID-License.txt for rules!
*/
#define USB_CFG_DEVICE_ID 0xdc, 0x05 /* 1500 in dec, obdev's free PID */
/* This is the ID of the product, low byte first. It is interpreted in the
* scope of the vendor ID. If you have registered your own VID with usb.org
* or if you have licensed a PID from somebody else, define it here. Otherwise
* you use obdev's free shared VID/PID pair. Be sure to read the rules in
* USBID-License.txt!
*/
#define USB_CFG_DEVICE_VERSION 0x00, 0x01
/* Version number of the device: Minor number first, then major number.
*/
#define USB_CFG_VENDOR_NAME 'w', 'w', 'w', '.', 's', 'c', 'h', 'a', 't', 'e', 'n', 's', 'e', 'i', 't', 'e', '.', 'd', 'e'
#define USB_CFG_VENDOR_NAME_LEN 19
/* These two values define the vendor name returned by the USB device. The name
* must be given as a list of characters under single quotes. The characters
* are interpreted as Unicode (UTF-16) entities.
* If you don't want a vendor name string, undefine these macros.
* ALWAYS define a vendor name containing your Internet domain name if you use
* obdev's free shared VID/PID pair. See the file USBID-License.txt for
* details.
*/
#define USB_CFG_DEVICE_NAME 'U', 'S', 'B', '-', 'L', 'E', 'D', '-', 'F', 'a', 'd', 'e', 'r'
#define USB_CFG_DEVICE_NAME_LEN 13
/* Same as above for the device name. If you don't want a device name, undefine
* the macros. See the file USBID-License.txt before you assign a name.
*/
#define USB_CFG_SERIAL_NUMBER_LENGTH 0
/* Set this define to the number of charcters in the serial number if your
* device should have a serial number to uniquely identify each hardware
* instance. You must supply the serial number in a string descriptor with the
* name "usbCfgSerialNumberStringDescriptor", e.g.:
* #define USB_CFG_SERIAL_NUMBER_LENGTH 5
* int usbCfgSerialNumberStringDescriptor[] PROGMEM = {
* USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LENGTH),
* '1', '2', '3', '4', '5'
* };
* See usbdrv.h for more information about the USB_STRING_DESCRIPTOR_HEADER()
* macro or usbdrv.c for example string descriptors.
* You may want to put "usbCfgSerialNumberStringDescriptor" at a constant
* flash memory address (with magic linker commands) so that you don't need
* to recompile if you change it.
*/
#define USB_CFG_DEVICE_CLASS 0xff
#define USB_CFG_DEVICE_SUBCLASS 0
/* See USB specification if you want to conform to an existing device class.
*/
#define USB_CFG_INTERFACE_CLASS 0
#define USB_CFG_INTERFACE_SUBCLASS 0
#define USB_CFG_INTERFACE_PROTOCOL 0
/* See USB specification if you want to conform to an existing device class or
* protocol.
*/
#define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH 0 /* total length of report descriptor */
/* Define this to the length of the HID report descriptor, if you implement
* an HID device. Otherwise don't define it or define it to 0.
*/
#endif /* __usbconfig_h_included__ */

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This file documents changes in the firmware-only USB driver for atmel's AVR
microcontrollers. New entries are always appended to the end of the file.
Scroll down to the bottom to see the most recent changes.
2005-04-01:
- Implemented endpoint 1 as interrupt-in endpoint.
- Moved all configuration options to usbconfig.h which is not part of the
driver.
- Changed interface for usbVendorSetup().
- Fixed compatibility with ATMega8 device.
- Various minor optimizations.
2005-04-11:
- Changed interface to application: Use usbFunctionSetup(), usbFunctionRead()
and usbFunctionWrite() now. Added configuration options to choose which
of these functions to compile in.
- Assembler module delivers receive data non-inverted now.
- Made register and bit names compatible with more AVR devices.
2005-05-03:
- Allow address of usbRxBuf on any memory page as long as the buffer does
not cross 256 byte page boundaries.
- Better device compatibility: works with Mega88 now.
- Code optimization in debugging module.
- Documentation updates.
2006-01-02:
- Added (free) default Vendor- and Product-IDs bought from voti.nl.
- Added USBID-License.txt file which defines the rules for using the free
shared VID/PID pair.
- Added Readme.txt to the usbdrv directory which clarifies administrative
issues.
2006-01-25:
- Added "configured state" to become more standards compliant.
- Added "HALT" state for interrupt endpoint.
- Driver passes the "USB Command Verifier" test from usb.org now.
- Made "serial number" a configuration option.
- Minor optimizations, we now recommend compiler option "-Os" for best
results.
- Added a version number to usbdrv.h
2006-02-03:
- New configuration variable USB_BUFFER_SECTION for the memory section where
the USB rx buffer will go. This defaults to ".bss" if not defined. Since
this buffer MUST NOT cross 256 byte pages (not even touch a page at the
end), the user may want to pass a linker option similar to
"-Wl,--section-start=.mybuffer=0x800060".
- Provide structure for usbRequest_t.
- New defines for USB constants.
- Prepared for HID implementations.
- Increased data size limit for interrupt transfers to 8 bytes.
- New macro usbInterruptIsReady() to query interrupt buffer state.
2006-02-18:
- Ensure that the data token which is sent as an ack to an OUT transfer is
always zero sized. This fixes a bug where the host reports an error after
sending an out transfer to the device, although all data arrived at the
device.
- Updated docs in usbdrv.h to reflect changed API in usbFunctionWrite().
* Release 2006-02-20
- Give a compiler warning when compiling with debugging turned on.
- Added Oleg Semyonov's changes for IAR-cc compatibility.
- Added new (optional) functions usbDeviceConnect() and usbDeviceDisconnect()
(also thanks to Oleg!).
- Rearranged tests in usbPoll() to save a couple of instructions in the most
likely case that no actions are pending.
- We need a delay between the SET ADDRESS request until the new address
becomes active. This delay was handled in usbPoll() until now. Since the
spec says that the delay must not exceed 2ms, previous versions required
aggressive polling during the enumeration phase. We have now moved the
handling of the delay into the interrupt routine.
- We must not reply with NAK to a SETUP transaction. We can only achieve this
by making sure that the rx buffer is empty when SETUP tokens are expected.
We therefore don't pass zero sized data packets from the status phase of
a transfer to usbPoll(). This change MAY cause troubles if you rely on
receiving a less than 8 bytes long packet in usbFunctionWrite() to
identify the end of a transfer. usbFunctionWrite() will NEVER be called
with a zero length.
* Release 2006-03-14
- Improved IAR C support: tiny memory model, more devices
- Added template usbconfig.h file under the name usbconfig-prototype.h
* Release 2006-03-26
- Added provision for one more interrupt-in endpoint (endpoint 3).
- Added provision for one interrupt-out endpoint (endpoint 1).
- Added flowcontrol macros for USB.
- Added provision for custom configuration descriptor.
- Allow ANY two port bits for D+ and D-.
- Merged (optional) receive endpoint number into global usbRxToken variable.
- Use USB_CFG_IOPORTNAME instead of USB_CFG_IOPORT. We now construct the
variable name from the single port letter instead of computing the address
of related ports from the output-port address.
* Release 2006-06-26
- Updated documentation in usbdrv.h and usbconfig-prototype.h to reflect the
new features.
- Removed "#warning" directives because IAR does not understand them. Use
unused static variables instead to generate a warning.
- Do not include <avr/io.h> when compiling with IAR.
- Introduced USB_CFG_DESCR_PROPS_* in usbconfig.h to configure how each
USB descriptor should be handled. It is now possible to provide descriptor
data in Flash, RAM or dynamically at runtime.
- STALL is now a status in usbTxLen* instead of a message. We can now conform
to the spec and leave the stall status pending until it is cleared.
- Made usbTxPacketCnt1 and usbTxPacketCnt3 public. This allows the
application code to reset data toggling on interrupt pipes.
* Release 2006-07-18

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PREFACE
Conceiving and understanding a new license is not an easy task. To make things
easier for both, the author and the licensee, we have decided to base our
license for the USB driver on an existing license with well-understood
properties.
Our favorite choice for the base license was the GNU General Public License
(GPL). However, we cannot use the GNU GPL directly for the following reasons:
(1) It was not intended for projects involving hardware -- we must extend the
term "source code" to at least the circuit diagram.
(2) The GNU GPL does not require publication. Only if a binary is published,
it requires that the source is published as well. This is reasonable for
software because unpublished software is of little relevance. For projects
involving hardware, we want to REQUIRE publication. More than that, we
even want to define HOW the publication must be done (files contained,
file formats etc).
(3) As the author of the software, we can distribute it under more than one
license. For people who don't want to meet the obligations of the GNU GPL,
we want to offer commercial licenses. To avoid a split in revisions of
the driver, we need special privileges to distribute contributed
modifications under proprietary licenses.
We can not simply modify the GNU GPL and incorporate our changes because the
Free Software Foundation (FSF) who holds the copyright for the text of the
GNU GPL does not allow modifications. We therefore set up our own small
license which incorporates the GNU GPL by reference:
LICENSE FOR PROJECTS BUILT WITH "OBJECTIVE DEVELOPMENT'S
FIRMWARE-ONLY USB-DRIVER FOR ATMEL'S AVR MICROCONTROLLERS"
Version 2006-01
I. Definitions
"OBDEV" shall mean OBJECTIVE DEVELOPMENT Software GmbH or any legal successor
thereof.
"Software Source Code" shall mean the preferred form of the software for
making modifications to it.
"USB Driver" shall mean the Software Source Code for OBDEV's firmware-only
USB-driver for Atmel's AVR microcontrollers.
"Function" shall mean the Software Source Code for all software executed on
the microcontroller except the USB Driver.
"Host Software" shall mean the Software Source Code for all software required
to control the USB device from the USB host running any operating system.
"Project" shall mean the USB Driver, the Function, the Host Software, circuit
diagrams of the controller based hardware and accompanying documentation.
"source code" shall have the same meaning as the term "Project" above.
"Web Site" shall mean a collection of text and multimedia documents accessible
worldwide over internet through the HyperText Transfer Protocol (HTTP) on
TCP port 80 (standard HTTP port).
II. General License Terms
The general terms of this license consist of the GNU General Public License
Version 2 (GNU GPL2) which is hereby incorporated into this section as though
it were fully set forth here. A copy of the GNU GPL2 is included for your
convenience in appendix A of this license.
The term "source code" in the GNU GPL2 is to be understood as defined in
section I above. If any term or definition in section I, III, IV or V
conflicts with the GNU GPL2, the term or definition in section I, III, IV or
V has precedence of the GNU GPL2.
III. Distribution of the Project
The distributed form of a Project must contain at least the following files:
(a) Software Source Code files for the USB Driver, the Function and the Host
Software.
(b) Circuit diagrams for the hardware in PDF, PNG or GIF image file format.
(c) A file with name "Readme.txt" in ASCII format with at least the following
content (in English language):
- An explanation what the Project does.
- What to do with the distributed files (installation procedure etc.).
- A reference to Objective Development's USB driver.
- Your (author's) name and contact information. E-mail and/or URL is
sufficient.
(d) Optionally a text file with a description of the circuit diagram, an
explanation of special (software) techniques used etc.
(e) A copy of this license in a file with the name "License.txt". This copy
can be in the "usbdrv" subdirectory which contains the driver.
IV. Requirement for Publication
All modifications and derived work (Projects using the USB Driver) MUST be
distributed (published) as described in section III above on a Web Site. The
main page must reproduce at least a description of the Project (e.g. as
contained in the "Readme.txt" file distributed) and a download link for the
entire Project. The URL of the main page must be submitted to OBDEV. OBDEV
will provide a mechanism for submitting Project URLs and for publishing
Projects on their Web Site. The Project must remain available for at least
twelve (12) months after the initial publication or at least six (6) months
after a subsequent version of that particular Project has been published.
V. Author Privileges
OBDEV reserves the right to distribute the USB Driver and all modified
versions under other (proprietary) licenses. If you modify the USB Driver
under the grants of this license, you therefore grant OBDEV (in addition to
the grants of the GNU GPL2) a worldwide, perpetual, irrevocable royalty free
license for your modifications. OBDEV shall not automatically gain rights
other than those of the GNU GPL2 in the other parts of the Project. This
section V overrides possibly contradicting terms in the GNU GPL2 referenced
in section II.
APPENDIX A
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
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anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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This is the Readme file to Objective Development's firmware-only USB driver
for Atmel AVR microcontrollers. For more information please visit
http://www.obdev.at/avrusb/
This directory contains the USB firmware only. Copy it as-is to your own
project and add your own version of "usbconfig.h". A template for your own
"usbconfig.h" can be found in "usbconfig-prototype.h" in this directory.
TECHNICAL DOCUMENTATION
=======================
The technical documentation for the firmware driver is contained in the file
"usbdrv.h". Please read all of it carefully!
USB IDENTIFIERS
===============
Every USB device needs a vendor- and a product-identifier (VID and PID). VIDs
are obtained from usb.org for a price of 1,500 USD. Once you have a VID, you
can assign PIDs at will.
Since an entry level cost of 1,500 USD is too high for most small companies
and hobbyists, we provide a single VID/PID pair for free. If you want to use
your own VID and PID instead of our's, define the macros "USB_CFG_VENDOR_ID"
and "USB_CFG_DEVICE_ID" accordingly in "usbconfig.h".
To use our predefined VID/PID pair, you MUST conform to a couple of
requirements. See the file "USBID-License.txt" for details.
HOST DRIVER
===========
You have received this driver together with an example device implementation
and an example host driver. The host driver is based on libusb and compiles
on various Unix flavors (Linux, BSD, Mac OS X). It also compiles natively on
Windows using MinGW (see www.mingw.org) and libusb-win32 (see
libusb-win32.sourceforge.net). The "Automator" project contains a native
Windows host driver (not based on libusb) for Human Interface Devices.
DEVELOPMENT SYSTEM
==================
This driver has been developed and optimized for the GNU compiler version 3
(gcc 3). It does work well with gcc 4 and future versions will probably be
optimized for gcc 4. We recommend that you use the GNU compiler suite because
it is freely available. AVR-USB has also been ported to the IAR compiler and
assembler. It has been tested with IAR 4.10B/W32 and 4.12A/W32 on an ATmega8
with the "small" and "tiny" memory model. Please note that gcc is more
efficient for usbdrv.c because this module has been deliberately optimized
for gcc.
USING AVR-USB FOR FREE
======================
The AVR firmware driver is published under an Open Source compliant license.
See the file "License.txt" for details. Since it is not obvious for many
people how this license applies to their own projects, here's a short guide:
(1) The USB driver and all your modifications to the driver itself are owned
by Objective Development. You must give us a worldwide, perpetual,
irrevocable royalty free license for your modifications.
(2) Since you own the code you have written (except where you modify our
driver), you can (at least in principle) determine the license for it freely.
However, to "pay" for the USB driver code you link against, we demand that
you choose an Open Source compliant license (compatible with our license) for
your source code and the hardware circuit diagrams. Simply attach your
license of choice to your parts of the project and leave our "License.txt" in
the "usbdrv" subdirectory.
(3) We also demand that you publish your work on the Internet and drop us a
note with the URL. The publication must meet certain formal criteria (files
distributed, file formats etc.). See the file "License.txt" for details.
Other than that, you are allowed to manufacture any number of units and sell
them for any price. If you like our driver, we also encourage you to make a
donation on our web site.
COMMERCIAL LICENSES FOR AVR-USB
===============================
If you don't want to publish your source code and the circuit diagrams under
an Open Source license, you can simply pay money for AVR-USB. As an
additional benefit you get USB PIDs for free, licensed exclusively to you.
See http://www.obdev.at/products/avrusb/license.html for details.

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Royalty-Free Non-Exclusive License USB Product-ID
=================================================
Version 2006-06-19
OBJECTIVE DEVELOPMENT Software GmbH hereby grants you the non-exclusive
right to use three USB.org vendor-ID (VID) / product-ID (PID) pairs with
products based on Objective Development's firmware-only USB driver for
Atmel AVR microcontrollers:
* VID = 5824 (=0x16c0) / PID = 1500 (=0x5dc) for devices implementing no
USB device class (vendor-class devices with USB class = 0xff). Devices
using this pair will be referred to as "VENDOR CLASS" devices.
* VID = 5824 (=0x16c0) / PID = 1503 (=0x5df) for HID class devices
(excluding mice and keyboards). Devices using this pair will be referred
to as "HID CLASS" devices.
* VID = 5824 (=0x16c0) / PID = 1505 (=0x5e1) for CDC class modem devices
Devices using this pair will be referred to as "CDC-ACM CLASS" devices.
Since the granted right is non-exclusive, the same VID/PID pairs may be
used by many companies and individuals for different products. To avoid
conflicts, your device and host driver software MUST adhere to the rules
outlined below.
OBJECTIVE DEVELOPMENT Software GmbH has licensed these VID/PID pairs from
Wouter van Ooijen (see www.voti.nl), who has licensed the VID from the USB
Implementers Forum, Inc. (see www.usb.org). The VID is registered for the
company name "Van Ooijen Technische Informatica".
RULES AND RESTRICTIONS
======================
(1) The USB device MUST provide a textual representation of the
manufacturer and product identification. The manufacturer identification
MUST be available at least in USB language 0x0409 (English/US).
(2) The textual manufacturer identification MUST contain either an Internet
domain name (e.g. "mycompany.com") registered and owned by you, or an
e-mail address under your control (e.g. "myname@gmx.net"). You can embed
the domain name or e-mail address in any string you like, e.g. "Objective
Development http://www.obdev.at/avrusb/".
(3) You are responsible for retaining ownership of the domain or e-mail
address for as long as any of your products are in use.
(4) You may choose any string for the textual product identification, as
long as this string is unique within the scope of your textual manufacturer
identification.
(5) Matching of device-specific drivers MUST be based on the textual
manufacturer and product identification in addition to the usual VID/PID
matching. This means that operating system features which are based on
VID/PID matching only (e.g. Windows kernel level drivers, automatic actions
when the device is plugged in etc) MUST NOT be used. The driver matching
MUST be a comparison of the entire strings, NOT a sub-string match. For
CDC-ACM CLASS devices, a generic class driver should be used and the
matching is based on the USB device class.
(6) The extent to which VID/PID matching is allowed for non device-specific
drivers or features depends on the operating system and particular VID/PID
pair used:
* Mac OS X, Linux, FreeBSD and other Unixes: No VID/PID matching is
required and hence no VID/PID-only matching is allowed at all.
* Windows: The operating system performs VID/PID matching for the kernel
level driver. You are REQUIRED to use libusb-win32 (see
http://libusb-win32.sourceforge.net/) as the kernel level driver for
VENDOR CLASS devices. HID CLASS devices all use the generic HID class
driver shipped with Windows, except mice and keyboards. You therefore
MUST NOT use any of the shared VID/PID pairs for mice or keyboards.
CDC-ACM CLASS devices require a ".inf" file which matches on the VID/PID
pair. This ".inf" file MUST load the "usbser" driver to configure the
device as modem (COM-port).
(7) OBJECTIVE DEVELOPMENT Software GmbH disclaims all liability for any
problems which are caused by the shared use of these VID/PID pairs. You
have been warned that the sharing of VID/PID pairs may cause problems. If
you want to avoid them, get your own VID/PID pair for exclusive use.
HOW TO IMPLEMENT THESE RULES
============================
The following rules are for VENDOR CLASS and HID CLASS devices. CDC-ACM
CLASS devices use the operating system's class driver and don't need a
custom driver.
The host driver MUST iterate over all devices with the given VID/PID
numbers in their device descriptors and query the string representation for
the manufacturer name in USB language 0x0409 (English/US). It MUST compare
the ENTIRE string with your textual manufacturer identification chosen in
(2) above. A substring search for your domain or e-mail address is NOT
acceptable. The driver MUST NOT touch the device (other than querying the
descriptors) unless the strings match.
For all USB devices with matching VID/PID and textual manufacturer
identification, the host driver must query the textual product
identification and string-compare it with the name of the product it can
control. It may only initialize the device if the product matches exactly.
Objective Development provides examples for these matching rules with the
"PowerSwitch" project (using libusb) and with the "Automator" project
(using Windows calls on Windows and libusb on Unix).
Technical Notes:
================
Sharing the same VID/PID pair among devices is possible as long as ALL
drivers which match the VID/PID also perform matching on the textual
identification strings. This is easy on all operating systems except
Windows, since Windows establishes a static connection between the VID/PID
pair and a kernel level driver. All devices with the same VID/PID pair must
therefore use THE SAME kernel level driver.
We therefore demand that you use libusb-win32 for VENDOR CLASS devices.
This is a generic kernel level driver which allows all types of USB access
for user space applications. This is only a partial solution of the
problem, though, because different device drivers may come with different
versions of libusb-win32 and they may not work with the libusb version of
the respective other driver. You are therefore encouraged to test your
driver against a broad range of libusb-win32 versions. Do not use new
features in new versions, or check for their existence before you use them.
When a new libusb-win32 becomes available, make sure that your driver is
compatible with it.
For HID CLASS devices it is necessary that all those devices bind to the
same kernel driver: Microsoft's generic USB HID driver. This is true for
all HID devices except those with a specialized driver. Currently, the only
HIDs with specialized drivers are mice and keyboards. You therefore MUST
NOT use a shared VID/PID with mouse and keyboard devices.
Sharing the same VID/PID among different products is unusual and probably
violates the USB specification. If you do it, you do it at your own risk.
To avoid possible incompatibilities, we highly recommend that you get your
own VID/PID pair if you intend to sell your product. Objective
Development's commercial licenses for AVR-USB include a PID for
unrestricted exclusive use.

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/* Name: iarcompat.h
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2006-03-01
* Tabsize: 4
* Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: iarcompat.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
/*
General Description:
This header is included when we compile with the IAR C-compiler and assembler.
It defines macros for cross compatibility between gcc and IAR-cc.
Thanks to Oleg Semyonov for his help with the IAR tools port!
*/
#ifndef __iarcompat_h_INCLUDED__
#define __iarcompat_h_INCLUDED__
#if defined __IAR_SYSTEMS_ICC__ || defined __IAR_SYSTEMS_ASM__
/* Enable bit definitions */
#ifndef ENABLE_BIT_DEFINITIONS
# define ENABLE_BIT_DEFINITIONS 1
#endif
/* Include IAR headers */
#include <ioavr.h>
#ifndef __IAR_SYSTEMS_ASM__
# include <inavr.h>
#endif
#define __attribute__(arg)
#define IAR_SECTION(section) @ section
#ifndef USB_BUFFER_SECTION
# define USB_BUFFER_SECTION "TINY_Z" /* if user has not selected a named section */
#endif
#ifdef __IAR_SYSTEMS_ASM__
# define __ASSEMBLER__
#endif
#ifdef __HAS_ELPM__
# define PROGMEM __farflash
#else
# define PROGMEM __flash
#endif
#define PRG_RDB(addr) (*(PROGMEM char *)(addr))
/* The following definitions are not needed by the driver, but may be of some
* help if you port a gcc based project to IAR.
*/
#define cli() __disable_interrupt()
#define sei() __enable_interrupt()
#define wdt_reset() __watchdog_reset()
/* Depending on the device you use, you may get problems with the way usbdrv.h
* handles the differences between devices. Since IAR does not use #defines
* for MCU registers, we can't check for the existence of a particular
* register with an #ifdef. If the autodetection mechanism fails, include
* definitions for the required USB_INTR_* macros in your usbconfig.h. See
* usbconfig-prototype.h and usbdrv.h for details.
*/
#endif /* defined __IAR_SYSTEMS_ICC__ || defined __IAR_SYSTEMS_ASM__ */
#endif /* __iarcompat_h_INCLUDED__ */

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/* Name: oddebug.c
* Project: AVR library
* Author: Christian Starkjohann
* Creation Date: 2005-01-16
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: oddebug.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#include "oddebug.h"
#if DEBUG_LEVEL > 0
static uchar Warning__Never_compile_production_devices_with_debugging;
/* The "#warning" preprocessor directive is non-standard. The unused static
* variable above should give a compiler warning on all compilers.
*/
static void uartPutc(char c)
{
while(!(ODDBG_USR & (1 << ODDBG_UDRE))); /* wait for data register empty */
ODDBG_UDR = c;
}
static uchar hexAscii(uchar h)
{
h &= 0xf;
if(h >= 10)
h += 'a' - (uchar)10 - '0';
h += '0';
return h;
}
static void printHex(uchar c)
{
uartPutc(hexAscii(c >> 4));
uartPutc(hexAscii(c));
}
void odDebug(uchar prefix, uchar *data, uchar len)
{
printHex(prefix);
uartPutc(':');
while(len--){
uartPutc(' ');
printHex(*data++);
}
uartPutc('\r');
uartPutc('\n');
}
#endif

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/* Name: oddebug.h
* Project: AVR library
* Author: Christian Starkjohann
* Creation Date: 2005-01-16
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: oddebug.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#ifndef __oddebug_h_included__
#define __oddebug_h_included__
/*
General Description:
This module implements a function for debug logs on the serial line of the
AVR microcontroller. Debugging can be configured with the define
'DEBUG_LEVEL'. If this macro is not defined or defined to 0, all debugging
calls are no-ops. If it is 1, DBG1 logs will appear, but not DBG2. If it is
2, DBG1 and DBG2 logs will be printed.
A debug log consists of a label ('prefix') to indicate which debug log created
the output and a memory block to dump in hex ('data' and 'len').
*/
#ifndef F_CPU
# define F_CPU 12000000 /* 12 MHz */
#endif
/* make sure we have the UART defines: */
#include "iarcompat.h"
#ifndef __IAR_SYSTEMS_ICC__
# include <avr/io.h>
#endif
#ifndef uchar
# define uchar unsigned char
#endif
#if DEBUG_LEVEL > 0 && !(defined TXEN || defined TXEN0) /* no UART in device */
# warning "Debugging disabled because device has no UART"
# undef DEBUG_LEVEL
#endif
#ifndef DEBUG_LEVEL
# define DEBUG_LEVEL 0
#endif
/* ------------------------------------------------------------------------- */
#if DEBUG_LEVEL > 0
# define DBG1(prefix, data, len) odDebug(prefix, data, len)
#else
# define DBG1(prefix, data, len)
#endif
#if DEBUG_LEVEL > 1
# define DBG2(prefix, data, len) odDebug(prefix, data, len)
#else
# define DBG2(prefix, data, len)
#endif
/* ------------------------------------------------------------------------- */
#if DEBUG_LEVEL > 0
extern void odDebug(uchar prefix, uchar *data, uchar len);
/* Try to find our control registers; ATMEL likes to rename these */
#if defined UBRR
# define ODDBG_UBRR UBRR
#elif defined UBRRL
# define ODDBG_UBRR UBRRL
#elif defined UBRR0
# define ODDBG_UBRR UBRR0
#elif defined UBRR0L
# define ODDBG_UBRR UBRR0L
#endif
#if defined UCR
# define ODDBG_UCR UCR
#elif defined UCSRB
# define ODDBG_UCR UCSRB
#elif defined UCSR0B
# define ODDBG_UCR UCSR0B
#endif
#if defined TXEN
# define ODDBG_TXEN TXEN
#else
# define ODDBG_TXEN TXEN0
#endif
#if defined USR
# define ODDBG_USR USR
#elif defined UCSRA
# define ODDBG_USR UCSRA
#elif defined UCSR0A
# define ODDBG_USR UCSR0A
#endif
#if defined UDRE
# define ODDBG_UDRE UDRE
#else
# define ODDBG_UDRE UDRE0
#endif
#if defined UDR
# define ODDBG_UDR UDR
#elif defined UDR0
# define ODDBG_UDR UDR0
#endif
static inline void odDebugInit(void)
{
ODDBG_UCR |= (1<<ODDBG_TXEN);
ODDBG_UBRR = F_CPU / (19200 * 16L) - 1;
}
#else
# define odDebugInit()
#endif
/* ------------------------------------------------------------------------- */
#endif /* __oddebug_h_included__ */

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/* Name: usbconfig.h
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2005-04-01
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbconfig-prototype.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#ifndef __usbconfig_h_included__
#define __usbconfig_h_included__
/*
General Description:
This file is an example configuration (with inline documentation) for the USB
driver. It configures AVR-USB for an ATMega8 with USB D+ connected to Port D
bit 2 (which is also hardware interrupt 0) and USB D- to Port D bit 0. You may
wire the lines to any other port, as long as D- is on bit 0 and D+ is also
wired to INT0.
To create your own usbconfig.h file, copy this file to the directory
containing "usbdrv" (that is your project firmware source directory) and
rename it to "usbconfig.h". Then edit it accordingly.
*/
/* ---------------------------- Hardware Config ---------------------------- */
#define USB_CFG_IOPORTNAME D
/* This is the port where the USB bus is connected. When you configure it to
* "B", the registers PORTB, PINB and DDRB will be used.
*/
#define USB_CFG_DMINUS_BIT 0
/* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
* This may be any bit in the port.
*/
#define USB_CFG_DPLUS_BIT 2
/* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
* This may be any bit in the port. Please note that D+ must also be connected
* to interrupt pin INT0!
*/
/* ----------------------- Optional Hardware Config ------------------------ */
/* #define USB_CFG_PULLUP_IOPORTNAME D */
/* If you connect the 1.5k pullup resistor from D- to a port pin instead of
* V+, you can connect and disconnect the device from firmware by calling
* the macros usbDeviceConnect() and usbDeviceDisconnect() (see usbdrv.h).
* This constant defines the port on which the pullup resistor is connected.
*/
/* #define USB_CFG_PULLUP_BIT 4 */
/* This constant defines the bit number in USB_CFG_PULLUP_IOPORT (defined
* above) where the 1.5k pullup resistor is connected. See description
* above for details.
*/
/* #define USB_BUFFER_SECTION ".bss" */
/* The USB receive buffer (variable "usbRxBuf") with a length of 22 bytes
* MUST NOT cross a 256 byte boundary. We have introduced this configuration
* option to allow you to change the data segment where this buffer is
* allocated. If you have problems with the default segment (start of .bss),
* you may change this setting. See the comment in usbdrv.h for details.
* On IAR C, the default is the TINY_Z segment (first 256 bytes). You must
* change this default for devices which don't have RAM below 0x100.
*/
/* --------------------------- Functional Range ---------------------------- */
#define USB_CFG_HAVE_INTRIN_ENDPOINT 1
/* Define this to 1 if you want to compile a version with two endpoints: The
* default control endpoint 0 and an interrupt-in endpoint 1.
*/
#define USB_CFG_HAVE_INTRIN_ENDPOINT3 0
/* Define this to 1 if you want to compile a version with three endpoints: The
* default control endpoint 0, an interrupt-in endpoint 1 and an interrupt-in
* endpoint 3. You must also enable endpoint 1 above.
*/
#define USB_CFG_IMPLEMENT_HALT 0
/* Define this to 1 if you also want to implement the ENDPOINT_HALT feature
* for endpoint 1 (interrupt endpoint). Although you may not need this feature,
* it is required by the standard. We have made it a config option because it
* bloats the code considerably.
*/
#define USB_CFG_INTR_POLL_INTERVAL 20
/* If you compile a version with endpoint 1 (interrupt-in), this is the poll
* interval. The value is in milliseconds and must not be less than 10 ms for
* low speed devices.
*/
#define USB_CFG_IS_SELF_POWERED 0
/* Define this to 1 if the device has its own power supply. Set it to 0 if the
* device is powered from the USB bus.
*/
#define USB_CFG_MAX_BUS_POWER 100
/* Set this variable to the maximum USB bus power consumption of your device.
* The value is in milliamperes. [It will be divided by two since USB
* communicates power requirements in units of 2 mA.]
*/
#define USB_CFG_SAMPLE_EXACT 1
/* This variable affects Sampling Jitter for USB receiving. When it is 0, the
* driver guarantees a sampling window of 1/2 bit. The USB spec requires
* that the receiver has at most 1/4 bit sampling window. The 1/2 bit window
* should still work reliably enough because we work at low speed. If you want
* to meet the spec, set this value to 1. This will unroll a loop which
* results in bigger code size.
* If you have problems with long cables, try setting this value to 1.
*/
#define USB_CFG_IMPLEMENT_FN_WRITE 0
/* Set this to 1 if you want usbFunctionWrite() to be called for control-out
* transfers. Set it to 0 if you don't need it and want to save a couple of
* bytes.
*/
#define USB_CFG_IMPLEMENT_FN_READ 0
/* Set this to 1 if you need to send control replies which are generated
* "on the fly" when usbFunctionRead() is called. If you only want to send
* data from a static buffer, set it to 0 and return the data from
* usbFunctionSetup(). This saves a couple of bytes.
*/
#define USB_CFG_IMPLEMENT_FN_WRITEOUT 0
/* Define this to 1 if you want to use interrupt-out (or bulk out) endpoint 1.
* You must implement the function usbFunctionWriteOut() which receives all
* interrupt/bulk data sent to endpoint 1.
*/
#define USB_CFG_HAVE_FLOWCONTROL 0
/* Define this to 1 if you want flowcontrol over USB data. See the definition
* of the macros usbDisableAllRequests() and usbEnableAllRequests() in
* usbdrv.h.
*/
/* -------------------------- Device Description --------------------------- */
#define USB_CFG_VENDOR_ID 0xc0, 0x16
/* USB vendor ID for the device, low byte first. If you have registered your
* own Vendor ID, define it here. Otherwise you use obdev's free shared
* VID/PID pair. Be sure to read USBID-License.txt for rules!
* This template uses obdev's shared VID/PID pair for HIDs: 0x16c0/0x5df.
* Use this VID/PID pair ONLY if you understand the implications!
*/
#define USB_CFG_DEVICE_ID 0xdf, 0x05
/* This is the ID of the product, low byte first. It is interpreted in the
* scope of the vendor ID. If you have registered your own VID with usb.org
* or if you have licensed a PID from somebody else, define it here. Otherwise
* you use obdev's free shared VID/PID pair. Be sure to read the rules in
* USBID-License.txt!
* This template uses obdev's shared VID/PID pair for HIDs: 0x16c0/0x5df.
* Use this VID/PID pair ONLY if you understand the implications!
*/
#define USB_CFG_DEVICE_VERSION 0x00, 0x01
/* Version number of the device: Minor number first, then major number.
*/
#define USB_CFG_VENDOR_NAME 'w', 'w', 'w', '.', 'o', 'b', 'd', 'e', 'v', '.', 'a', 't'
#define USB_CFG_VENDOR_NAME_LEN 12
/* These two values define the vendor name returned by the USB device. The name
* must be given as a list of characters under single quotes. The characters
* are interpreted as Unicode (UTF-16) entities.
* If you don't want a vendor name string, undefine these macros.
* ALWAYS define a vendor name containing your Internet domain name if you use
* obdev's free shared VID/PID pair. See the file USBID-License.txt for
* details.
*/
#define USB_CFG_DEVICE_NAME 'T', 'e', 'm', 'p', 'l', 'a', 't', 'e'
#define USB_CFG_DEVICE_NAME_LEN 8
/* Same as above for the device name. If you don't want a device name, undefine
* the macros. See the file USBID-License.txt before you assign a name if you
* use a shared VID/PID.
*/
/*#define USB_CFG_SERIAL_NUMBER 'N', 'o', 'n', 'e' */
/*#define USB_CFG_SERIAL_NUMBER_LEN 0 */
/* Same as above for the serial number. If you don't want a serial number,
* undefine the macros.
* It may be useful to provide the serial number through other means than at
* compile time. See the section about descriptor properties below for how
* to fine tune control over USB descriptors such as the string descriptor
* for the serial number.
*/
#define USB_CFG_DEVICE_CLASS 0
#define USB_CFG_DEVICE_SUBCLASS 0
/* See USB specification if you want to conform to an existing device class.
*/
#define USB_CFG_INTERFACE_CLASS 3 /* HID */
#define USB_CFG_INTERFACE_SUBCLASS 0
#define USB_CFG_INTERFACE_PROTOCOL 0
/* See USB specification if you want to conform to an existing device class or
* protocol.
* This template defines a HID class device. If you implement a vendor class
* device, set USB_CFG_INTERFACE_CLASS to 0 and USB_CFG_DEVICE_CLASS to 0xff.
*/
#define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH 42 /* total length of report descriptor */
/* Define this to the length of the HID report descriptor, if you implement
* an HID device. Otherwise don't define it or define it to 0.
* Since this template defines a HID device, it must also specify a HID
* report descriptor length. You must add a PROGMEM character array named
* "usbHidReportDescriptor" to your code which contains the report descriptor.
* Don't forget to keep the array and this define in sync!
*/
/* ------------------- Fine Control over USB Descriptors ------------------- */
/* If you don't want to use the driver's default USB descriptors, you can
* provide our own. These can be provided as (1) fixed length static data in
* flash memory, (2) fixed length static data in RAM or (3) dynamically at
* runtime in the function usbFunctionDescriptor(). See usbdrv.h for more
* information about this function.
* Descriptor handling is configured through the descriptor's properties. If
* no properties are defined or if they are 0, the default descriptor is used.
* Possible properties are:
* + USB_PROP_IS_DYNAMIC: The data for the descriptor should be fetched
* at runtime via usbFunctionDescriptor().
* + USB_PROP_IS_RAM: The data returned by usbFunctionDescriptor() or found
* in static memory is in RAM, not in flash memory.
* + USB_PROP_LENGTH(len): If the data is in static memory (RAM or flash),
* the driver must know the descriptor's length. The descriptor itself is
* found at the address of a well known identifier (see below).
* List of static descriptor names (must be declared PROGMEM if in flash):
* char usbDescriptorDevice[];
* char usbDescriptorConfiguration[];
* char usbDescriptorHidReport[];
* char usbDescriptorString0[];
* int usbDescriptorStringVendor[];
* int usbDescriptorStringDevice[];
* int usbDescriptorStringSerialNumber[];
* Other descriptors can't be provided statically, they must be provided
* dynamically at runtime.
*
* Descriptor properties are or-ed or added together, e.g.:
* #define USB_CFG_DESCR_PROPS_DEVICE (USB_PROP_IS_RAM | USB_PROP_LENGTH(18))
*
* The following descriptors are defined:
* USB_CFG_DESCR_PROPS_DEVICE
* USB_CFG_DESCR_PROPS_CONFIGURATION
* USB_CFG_DESCR_PROPS_STRINGS
* USB_CFG_DESCR_PROPS_STRING_0
* USB_CFG_DESCR_PROPS_STRING_VENDOR
* USB_CFG_DESCR_PROPS_STRING_PRODUCT
* USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
* USB_CFG_DESCR_PROPS_HID
* USB_CFG_DESCR_PROPS_HID_REPORT
* USB_CFG_DESCR_PROPS_UNKNOWN (for all descriptors not handled by the driver)
*
*/
#define USB_CFG_DESCR_PROPS_DEVICE 0
#define USB_CFG_DESCR_PROPS_CONFIGURATION 0
#define USB_CFG_DESCR_PROPS_STRINGS 0
#define USB_CFG_DESCR_PROPS_STRING_0 0
#define USB_CFG_DESCR_PROPS_STRING_VENDOR 0
#define USB_CFG_DESCR_PROPS_STRING_PRODUCT 0
#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER 0
#define USB_CFG_DESCR_PROPS_HID 0
#define USB_CFG_DESCR_PROPS_HID_REPORT 0
#define USB_CFG_DESCR_PROPS_UNKNOWN 0
/* ----------------------- Optional MCU Description ------------------------ */
/* The following configurations have working defaults in usbdrv.h. You
* usually don't need to set them explicitly. Only if you want to run
* the driver on a device which is not yet supported or with a compiler
* which is not fully supported (such as IAR C) or if you use a differnt
* interrupt than INT0, you may have to define some of these.
*/
/* #define USB_INTR_CFG MCUCR */
/* #define USB_INTR_CFG_SET ((1 << ISC00) | (1 << ISC01)) */
/* #define USB_INTR_CFG_CLR 0 */
/* #define USB_INTR_ENABLE GIMSK */
/* #define USB_INTR_ENABLE_BIT INT0 */
/* #define USB_INTR_PENDING GIFR */
/* #define USB_INTR_PENDING_BIT INTF0 */
#endif /* __usbconfig_h_included__ */

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/* Name: usbdrv.c
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2004-12-29
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbdrv.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#include "iarcompat.h"
#ifndef __IAR_SYSTEMS_ICC__
# include <avr/io.h>
# include <avr/pgmspace.h>
#endif
#include "usbdrv.h"
#include "oddebug.h"
/*
General Description:
This module implements the C-part of the USB driver. See usbdrv.h for a
documentation of the entire driver.
*/
#ifndef IAR_SECTION
#define IAR_SECTION(arg)
#define __no_init
#endif
/* The macro IAR_SECTION is a hack to allow IAR-cc compatibility. On gcc, it
* is defined to nothing. __no_init is required on IAR.
*/
/* ------------------------------------------------------------------------- */
/* raw USB registers / interface to assembler code: */
/* usbRxBuf MUST be in 1 byte addressable range (because usbInputBuf is only 1 byte) */
__no_init uchar usbRxBuf[2][USB_BUFSIZE] __attribute__ ((section (USB_BUFFER_SECTION))) IAR_SECTION(USB_BUFFER_SECTION);/* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */
uchar usbDeviceAddr; /* assigned during enumeration, defaults to 0 */
uchar usbNewDeviceAddr; /* device ID which should be set after status phase */
uchar usbConfiguration; /* currently selected configuration. Administered by driver, but not used */
uchar usbInputBuf; /* ptr to raw buffer used for receiving */
uchar usbAppBuf; /* ptr to raw buffer passed to app for processing */
volatile schar usbRxLen; /* = 0; number of bytes in usbAppBuf; 0 means free */
uchar usbCurrentTok; /* last token received, if more than 1 rx endpoint: MSb=endpoint */
uchar usbRxToken; /* token for data we received; if more than 1 rx endpoint: MSb=endpoint */
uchar usbMsgLen = 0xff; /* remaining number of bytes, no msg to send if -1 (see usbMsgPtr) */
volatile uchar usbTxLen = USBPID_NAK; /* number of bytes to transmit with next IN token or handshake token */
uchar usbTxBuf[USB_BUFSIZE];/* data to transmit with next IN, free if usbTxLen contains handshake token */
#if USB_CFG_HAVE_INTRIN_ENDPOINT
volatile uchar usbTxLen1 = USBPID_NAK; /* TX count for endpoint 1 */
uchar usbTxBuf1[USB_BUFSIZE]; /* TX data for endpoint 1 */
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
volatile uchar usbTxLen3 = USBPID_NAK; /* TX count for endpoint 1 */
uchar usbTxBuf3[USB_BUFSIZE]; /* TX data for endpoint 1 */
#endif
#endif
/* USB status registers / not shared with asm code */
uchar *usbMsgPtr; /* data to transmit next -- ROM or RAM address */
static uchar usbMsgFlags; /* flag values see below */
static uchar usbIsReset; /* = 0; USB bus is in reset phase */
#define USB_FLG_TX_PACKET (1<<0)
/* Leave free 6 bits after TX_PACKET. This way we can increment usbMsgFlags to toggle TX_PACKET */
#define USB_FLG_MSGPTR_IS_ROM (1<<6)
#define USB_FLG_USE_DEFAULT_RW (1<<7)
/*
optimizing hints:
- do not post/pre inc/dec integer values in operations
- assign value of PRG_RDB() to register variables and don't use side effects in arg
- use narrow scope for variables which should be in X/Y/Z register
- assign char sized expressions to variables to force 8 bit arithmetics
*/
/* ------------------------------------------------------------------------- */
#if USB_CFG_DESCR_PROPS_STRINGS == 0
#if USB_CFG_DESCR_PROPS_STRING_0 == 0
#undef USB_CFG_DESCR_PROPS_STRING_0
#define USB_CFG_DESCR_PROPS_STRING_0 sizeof(usbDescriptorString0)
PROGMEM char usbDescriptorString0[] = { /* language descriptor */
4, /* sizeof(usbDescriptorString0): length of descriptor in bytes */
3, /* descriptor type */
0x09, 0x04, /* language index (0x0409 = US-English) */
};
#endif
#if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN
#undef USB_CFG_DESCR_PROPS_STRING_VENDOR
#define USB_CFG_DESCR_PROPS_STRING_VENDOR sizeof(usbDescriptorStringVendor)
PROGMEM int usbDescriptorStringVendor[] = {
USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN),
USB_CFG_VENDOR_NAME
};
#endif
#if USB_CFG_DESCR_PROPS_STRING_DEVICE == 0 && USB_CFG_DEVICE_NAME_LEN
#undef USB_CFG_DESCR_PROPS_STRING_DEVICE
#define USB_CFG_DESCR_PROPS_STRING_DEVICE sizeof(usbDescriptorStringDevice)
PROGMEM int usbDescriptorStringDevice[] = {
USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN),
USB_CFG_DEVICE_NAME
};
#endif
#if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN
#undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER sizeof(usbDescriptorStringSerialNumber)
PROGMEM int usbDescriptorStringSerialNumber[] = {
USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN),
USB_CFG_SERIAL_NUMBER
};
#endif
#endif /* USB_CFG_DESCR_PROPS_STRINGS == 0 */
#if USB_CFG_DESCR_PROPS_DEVICE == 0
#undef USB_CFG_DESCR_PROPS_DEVICE
#define USB_CFG_DESCR_PROPS_DEVICE sizeof(usbDescriptorDevice)
PROGMEM char usbDescriptorDevice[] = { /* USB device descriptor */
18, /* sizeof(usbDescriptorDevice): length of descriptor in bytes */
USBDESCR_DEVICE, /* descriptor type */
0x01, 0x01, /* USB version supported */
USB_CFG_DEVICE_CLASS,
USB_CFG_DEVICE_SUBCLASS,
0, /* protocol */
8, /* max packet size */
USB_CFG_VENDOR_ID, /* 2 bytes */
USB_CFG_DEVICE_ID, /* 2 bytes */
USB_CFG_DEVICE_VERSION, /* 2 bytes */
USB_CFG_DESCR_PROPS_STRING_VENDOR != 0 ? 1 : 0, /* manufacturer string index */
USB_CFG_DESCR_PROPS_STRING_DEVICE != 0 ? 2 : 0, /* product string index */
USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER != 0 ? 3 : 0, /* serial number string index */
1, /* number of configurations */
};
#endif
#if USB_CFG_DESCR_PROPS_HID_REPORT != 0 && USB_CFG_DESCR_PROPS_HID == 0
#undef USB_CFG_DESCR_PROPS_HID
#define USB_CFG_DESCR_PROPS_HID 9 /* length of HID descriptor in config descriptor below */
#endif
#if USB_CFG_DESCR_PROPS_CONFIGURATION == 0
#undef USB_CFG_DESCR_PROPS_CONFIGURATION
#define USB_CFG_DESCR_PROPS_CONFIGURATION sizeof(usbDescriptorConfiguration)
PROGMEM char usbDescriptorConfiguration[] = { /* USB configuration descriptor */
9, /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
USBDESCR_CONFIG, /* descriptor type */
18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + (USB_CFG_DESCR_PROPS_HID & 0xff), 0,
/* total length of data returned (including inlined descriptors) */
1, /* number of interfaces in this configuration */
1, /* index of this configuration */
0, /* configuration name string index */
#if USB_CFG_IS_SELF_POWERED
USBATTR_SELFPOWER, /* attributes */
#else
USBATTR_BUSPOWER, /* attributes */
#endif
USB_CFG_MAX_BUS_POWER/2, /* max USB current in 2mA units */
/* interface descriptor follows inline: */
9, /* sizeof(usbDescrInterface): length of descriptor in bytes */
USBDESCR_INTERFACE, /* descriptor type */
0, /* index of this interface */
0, /* alternate setting for this interface */
USB_CFG_HAVE_INTRIN_ENDPOINT, /* endpoints excl 0: number of endpoint descriptors to follow */
USB_CFG_INTERFACE_CLASS,
USB_CFG_INTERFACE_SUBCLASS,
USB_CFG_INTERFACE_PROTOCOL,
0, /* string index for interface */
#if (USB_CFG_DESCR_PROPS_HID & 0xff) /* HID descriptor */
9, /* sizeof(usbDescrHID): length of descriptor in bytes */
USBDESCR_HID, /* descriptor type: HID */
0x01, 0x01, /* BCD representation of HID version */
0x00, /* target country code */
0x01, /* number of HID Report (or other HID class) Descriptor infos to follow */
0x22, /* descriptor type: report */
USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0, /* total length of report descriptor */
#endif
#if USB_CFG_HAVE_INTRIN_ENDPOINT /* endpoint descriptor for endpoint 1 */
7, /* sizeof(usbDescrEndpoint) */
USBDESCR_ENDPOINT, /* descriptor type = endpoint */
0x81, /* IN endpoint number 1 */
0x03, /* attrib: Interrupt endpoint */
8, 0, /* maximum packet size */
USB_CFG_INTR_POLL_INTERVAL, /* in ms */
#endif
};
#endif
/* We don't use prog_int or prog_int16_t for compatibility with various libc
* versions. Here's an other compatibility hack:
*/
#ifndef PRG_RDB
#define PRG_RDB(addr) pgm_read_byte(addr)
#endif
typedef union{
unsigned word;
uchar *ptr;
uchar bytes[2];
}converter_t;
/* We use this union to do type conversions. This is better optimized than
* type casts in gcc 3.4.3 and much better than using bit shifts to build
* ints from chars. Byte ordering is not a problem on an 8 bit platform.
*/
/* ------------------------------------------------------------------------- */
#if USB_CFG_HAVE_INTRIN_ENDPOINT
uchar usbTxPacketCnt1;
void usbSetInterrupt(uchar *data, uchar len)
{
uchar *p, i;
#if USB_CFG_IMPLEMENT_HALT
if(usbTxLen1 == USBPID_STALL)
return;
#endif
#if 0 /* No runtime checks! Caller is responsible for valid data! */
if(len > 8) /* interrupt transfers are limited to 8 bytes */
len = 8;
#endif
i = USBPID_DATA1;
if(usbTxPacketCnt1 & 1)
i = USBPID_DATA0;
if(usbTxLen1 & 0x10){ /* packet buffer was empty */
usbTxPacketCnt1++;
}else{
usbTxLen1 = USBPID_NAK; /* avoid sending incomplete interrupt data */
}
p = usbTxBuf1;
*p++ = i;
for(i=len;i--;)
*p++ = *data++;
usbCrc16Append(&usbTxBuf1[1], len);
usbTxLen1 = len + 4; /* len must be given including sync byte */
DBG2(0x21, usbTxBuf1, len + 3);
}
#endif
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
uchar usbTxPacketCnt3;
void usbSetInterrupt3(uchar *data, uchar len)
{
uchar *p, i;
i = USBPID_DATA1;
if(usbTxPacketCnt3 & 1)
i = USBPID_DATA0;
if(usbTxLen3 & 0x10){ /* packet buffer was empty */
usbTxPacketCnt3++;
}else{
usbTxLen3 = USBPID_NAK; /* avoid sending incomplete interrupt data */
}
p = usbTxBuf3;
*p++ = i;
for(i=len;i--;)
*p++ = *data++;
usbCrc16Append(&usbTxBuf3[1], len);
usbTxLen3 = len + 4; /* len must be given including sync byte */
DBG2(0x23, usbTxBuf3, len + 3);
}
#endif
static uchar usbRead(uchar *data, uchar len)
{
#if USB_CFG_IMPLEMENT_FN_READ
if(usbMsgFlags & USB_FLG_USE_DEFAULT_RW){
#endif
uchar i = len, *r = usbMsgPtr;
if(usbMsgFlags & USB_FLG_MSGPTR_IS_ROM){ /* ROM data */
while(i--){
uchar c = PRG_RDB(r); /* assign to char size variable to enforce byte ops */
*data++ = c;
r++;
}
}else{ /* RAM data */
while(i--)
*data++ = *r++;
}
usbMsgPtr = r;
return len;
#if USB_CFG_IMPLEMENT_FN_READ
}else{
if(len != 0) /* don't bother app with 0 sized reads */
return usbFunctionRead(data, len);
return 0;
}
#endif
}
#define GET_DESCRIPTOR(cfgProp, staticName) \
if(cfgProp){ \
if((cfgProp) & USB_PROP_IS_RAM) \
flags &= ~USB_FLG_MSGPTR_IS_ROM; \
if((cfgProp) & USB_PROP_IS_DYNAMIC){ \
replyLen = usbFunctionDescriptor(rq); \
}else{ \
replyData = (uchar *)(staticName); \
SET_REPLY_LEN((cfgProp) & 0xff); \
} \
}
/* We use if() instead of #if in the macro above because #if can't be used
* in macros and the compiler optimizes constant conditions anyway.
*/
/* Don't make this function static to avoid inlining.
* The entire function would become too large and exceed the range of
* relative jumps.
* 2006-02-25: Either gcc 3.4.3 is better than the gcc used when the comment
* above was written, or other parts of the code have changed. We now get
* better results with an inlined function. Test condition: PowerSwitch code.
*/
static void usbProcessRx(uchar *data, uchar len)
{
usbRequest_t *rq = (void *)data;
uchar replyLen = 0, flags = USB_FLG_USE_DEFAULT_RW;
/* We use if() cascades because the compare is done byte-wise while switch()
* is int-based. The if() cascades are therefore more efficient.
*/
DBG2(0x10 + ((usbRxToken >> 6) & 3), data, len);
#if USB_CFG_IMPLEMENT_FN_WRITEOUT
if(usbRxToken & 0x80){
usbFunctionWriteOut(data, len);
return; /* no reply expected, hence no usbMsgPtr, usbMsgFlags, usbMsgLen set */
}
if(usbRxToken == (uchar)(USBPID_SETUP & 0x7f)){ /* MSb contains endpoint (== 0) */
#else
if(usbRxToken == (uchar)USBPID_SETUP){
#endif
if(len == 8){ /* Setup size must be always 8 bytes. Ignore otherwise. */
uchar type = rq->bmRequestType & USBRQ_TYPE_MASK;
if(type == USBRQ_TYPE_STANDARD){
#define SET_REPLY_LEN(len) replyLen = (len); usbMsgPtr = replyData
/* This macro ensures that replyLen and usbMsgPtr are always set in the same way.
* That allows optimization of common code in if() branches */
uchar *replyData = usbTxBuf + 9; /* there is 3 bytes free space at the end of the buffer */
replyData[0] = 0; /* common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */
if(rq->bRequest == USBRQ_GET_STATUS){ /* 0 */
uchar __attribute__((__unused__)) recipient = rq->bmRequestType & USBRQ_RCPT_MASK; /* assign arith ops to variables to enforce byte size */
#if USB_CFG_IS_SELF_POWERED
if(recipient == USBRQ_RCPT_DEVICE)
replyData[0] = USB_CFG_IS_SELF_POWERED;
#endif
#if USB_CFG_HAVE_INTRIN_ENDPOINT && USB_CFG_IMPLEMENT_HALT
if(recipient == USBRQ_RCPT_ENDPOINT && rq->wIndex.bytes[0] == 0x81) /* request status for endpoint 1 */
replyData[0] = usbTxLen1 == USBPID_STALL;
#endif
replyData[1] = 0;
SET_REPLY_LEN(2);
}else if(rq->bRequest == USBRQ_SET_ADDRESS){ /* 5 */
usbNewDeviceAddr = rq->wValue.bytes[0];
}else if(rq->bRequest == USBRQ_GET_DESCRIPTOR){ /* 6 */
flags = USB_FLG_MSGPTR_IS_ROM | USB_FLG_USE_DEFAULT_RW;
if(rq->wValue.bytes[1] == USBDESCR_DEVICE){ /* 1 */
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice)
}else if(rq->wValue.bytes[1] == USBDESCR_CONFIG){ /* 2 */
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration)
}else if(rq->wValue.bytes[1] == USBDESCR_STRING){ /* 3 */
#if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC
if(USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM)
flags &= ~USB_FLG_MSGPTR_IS_ROM;
replyLen = usbFunctionDescriptor(rq);
#else /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
if(rq->wValue.bytes[0] == 0){ /* descriptor index */
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0)
}else if(rq->wValue.bytes[0] == 1){
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor)
}else if(rq->wValue.bytes[0] == 2){
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_DEVICE, usbDescriptorStringDevice)
}else if(rq->wValue.bytes[0] == 3){
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber)
}else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
replyLen = usbFunctionDescriptor(rq);
}
#endif /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
}else if(rq->wValue.bytes[1] == USBDESCR_HID){ /* 0x21 */
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18)
}else if(rq->wValue.bytes[1] == USBDESCR_HID_REPORT){ /* 0x22 */
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport)
}else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
replyLen = usbFunctionDescriptor(rq);
}
}else if(rq->bRequest == USBRQ_GET_CONFIGURATION){ /* 8 */
replyData = &usbConfiguration; /* send current configuration value */
SET_REPLY_LEN(1);
}else if(rq->bRequest == USBRQ_SET_CONFIGURATION){ /* 9 */
usbConfiguration = rq->wValue.bytes[0];
#if USB_CFG_IMPLEMENT_HALT
usbTxLen1 = USBPID_NAK;
#endif
}else if(rq->bRequest == USBRQ_GET_INTERFACE){ /* 10 */
SET_REPLY_LEN(1);
#if USB_CFG_HAVE_INTRIN_ENDPOINT
}else if(rq->bRequest == USBRQ_SET_INTERFACE){ /* 11 */
usbTxPacketCnt1 = 0; /* reset data toggling for interrupt endpoint */
# if USB_CFG_HAVE_INTRIN_ENDPOINT3
usbTxPacketCnt3 = 0; /* reset data toggling for interrupt endpoint */
# endif
# if USB_CFG_IMPLEMENT_HALT
usbTxLen1 = USBPID_NAK;
}else if(rq->bRequest == USBRQ_CLEAR_FEATURE || rq->bRequest == USBRQ_SET_FEATURE){ /* 1|3 */
if(rq->wValue.bytes[0] == 0 && rq->wIndex.bytes[0] == 0x81){ /* feature 0 == HALT for endpoint == 1 */
usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL;
usbTxPacketCnt1 = 0; /* reset data toggling for interrupt endpoint */
# if USB_CFG_HAVE_INTRIN_ENDPOINT3
usbTxPacketCnt3 = 0; /* reset data toggling for interrupt endpoint */
# endif
}
# endif
#endif
}else{
/* the following requests can be ignored, send default reply */
/* 1: CLEAR_FEATURE, 3: SET_FEATURE, 7: SET_DESCRIPTOR */
/* 12: SYNCH_FRAME */
}
#undef SET_REPLY_LEN
}else{ /* not a standard request -- must be vendor or class request */
replyLen = usbFunctionSetup(data);
}
#if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE
if(replyLen == 0xff){ /* use user-supplied read/write function */
if((rq->bmRequestType & USBRQ_DIR_MASK) == USBRQ_DIR_DEVICE_TO_HOST){
replyLen = rq->wLength.bytes[0]; /* IN transfers only */
}
flags &= ~USB_FLG_USE_DEFAULT_RW; /* we have no valid msg, use user supplied read/write functions */
}else /* The 'else' prevents that we limit a replyLen of 0xff to the maximum transfer len. */
#endif
if(!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0]) /* limit length to max */
replyLen = rq->wLength.bytes[0];
}
/* make sure that data packets which are sent as ACK to an OUT transfer are always zero sized */
}else{ /* DATA packet from out request */
#if USB_CFG_IMPLEMENT_FN_WRITE
if(!(usbMsgFlags & USB_FLG_USE_DEFAULT_RW)){
uchar rval = usbFunctionWrite(data, len);
replyLen = 0xff;
if(rval == 0xff){ /* an error occurred */
usbMsgLen = 0xff; /* cancel potentially pending data packet for ACK */
usbTxLen = USBPID_STALL;
}else if(rval != 0){ /* This was the final package */
replyLen = 0; /* answer with a zero-sized data packet */
}
flags = 0; /* start with a DATA1 package, stay with user supplied write() function */
}
#endif
}
usbMsgFlags = flags;
usbMsgLen = replyLen;
}
/* ------------------------------------------------------------------------- */
static void usbBuildTxBlock(void)
{
uchar wantLen, len, txLen, token;
wantLen = usbMsgLen;
if(wantLen > 8)
wantLen = 8;
usbMsgLen -= wantLen;
token = USBPID_DATA1;
if(usbMsgFlags & USB_FLG_TX_PACKET)
token = USBPID_DATA0;
usbMsgFlags++;
len = usbRead(usbTxBuf + 1, wantLen);
if(len <= 8){ /* valid data packet */
usbCrc16Append(&usbTxBuf[1], len);
txLen = len + 4; /* length including sync byte */
if(len < 8) /* a partial package identifies end of message */
usbMsgLen = 0xff;
}else{
txLen = USBPID_STALL; /* stall the endpoint */
usbMsgLen = 0xff;
}
usbTxBuf[0] = token;
usbTxLen = txLen;
DBG2(0x20, usbTxBuf, txLen-1);
}
static inline uchar isNotSE0(void)
{
uchar rval;
/* We want to do
* return (USBIN & USBMASK);
* here, but the compiler does int-expansion acrobatics.
* We can avoid this by assigning to a char-sized variable.
*/
rval = USBIN & USBMASK;
return rval;
}
/* ------------------------------------------------------------------------- */
void usbPoll(void)
{
uchar len;
if((len = usbRxLen) > 0){
/* We could check CRC16 here -- but ACK has already been sent anyway. If you
* need data integrity checks with this driver, check the CRC in your app
* code and report errors back to the host. Since the ACK was already sent,
* retries must be handled on application level.
* unsigned crc = usbCrc16((uchar *)(unsigned)(usbAppBuf + 1), usbRxLen - 3);
*/
len -= 3; /* remove PID and CRC */
if(len < 128){ /* no overflow */
converter_t appBuf;
appBuf.ptr = (uchar *)usbRxBuf;
appBuf.bytes[0] = usbAppBuf;
appBuf.bytes[0]++;
usbProcessRx(appBuf.ptr, len);
}
#if USB_CFG_HAVE_FLOWCONTROL
if(usbRxLen > 0) /* only mark as available if not inactivated */
usbRxLen = 0;
#else
usbRxLen = 0; /* mark rx buffer as available */
#endif
}
if(usbMsgLen != 0xff){ /* transmit data pending? */
if(usbTxLen & 0x10) /* transmit system idle */
usbBuildTxBlock();
}
if(isNotSE0()){ /* SE0 state */
usbIsReset = 0;
}else{
/* check whether SE0 lasts for more than 2.5us (3.75 bit times) */
if(!usbIsReset){
uchar i;
for(i=100;i;i--){
if(isNotSE0())
goto notUsbReset;
}
usbIsReset = 1;
usbNewDeviceAddr = 0;
usbDeviceAddr = 0;
#if USB_CFG_IMPLEMENT_HALT
usbTxLen1 = USBPID_NAK;
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
usbTxLen3 = USBPID_NAK;
#endif
#endif
DBG1(0xff, 0, 0);
notUsbReset:;
}
}
}
/* ------------------------------------------------------------------------- */
void usbInit(void)
{
usbInputBuf = (uchar)usbRxBuf[0];
usbAppBuf = (uchar)usbRxBuf[1];
#if USB_INTR_CFG_SET != 0
USB_INTR_CFG |= USB_INTR_CFG_SET;
#endif
#if USB_INTR_CFG_CLR != 0
USB_INTR_CFG &= ~(USB_INTR_CFG_CLR);
#endif
USB_INTR_ENABLE |= (1 << USB_INTR_ENABLE_BIT);
}
/* ------------------------------------------------------------------------- */

657
firmware/usbdrv/usbdrv.h Normal file
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@ -0,0 +1,657 @@
/* Name: usbdrv.h
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2004-12-29
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbdrv.h,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
#ifndef __usbdrv_h_included__
#define __usbdrv_h_included__
#include "usbconfig.h"
#include "iarcompat.h"
/*
Hardware Prerequisites:
=======================
USB lines D+ and D- MUST be wired to the same I/O port. D+ must (also) be
connected to INT0. D- requires a pullup of 1.5k to +3.5V (and the device
must be powered at 3.5V) to identify as low-speed USB device. A pullup of
1M SHOULD be connected from D+ to +3.5V to prevent interference when no USB
master is connected. We use D+ as interrupt source and not D- because it
does not trigger on keep-alive and RESET states.
As a compile time option, the 1.5k pullup resistor on D- can be made
switchable to allow the device to disconnect at will. See the definition of
usbDeviceConnect() and usbDeviceDisconnect() further down in this file.
Please adapt the values in usbconfig.h according to your hardware!
The device MUST be clocked at 12 MHz. This is more than the 10 MHz allowed by
an AT90S2313 powered at 4.5V. However, if the supply voltage to maximum clock
relation is interpolated linearly, an ATtiny2313 meets the requirement by
specification. In practice, the AT90S2313 can be overclocked and works well.
Limitations:
============
Compiling:
You should link the usbdrv.o module first because it has special alignment
requirements for the receive buffer (the buffer must not cross a 256 byte
page boundary, it must not even touch it at the end). If you can't link it
first, you must use other measures to ensure alignment.
Note: gcc does not always assign variable addresses in the order as the modules
are linked or the variables are declared. You can choose a memory section for
the receive buffer with the configuration option "USB_BUFFER_SECTION". This
option defaults to ".bss". If you use your own section, you can place it at
an arbitrary location with a linker option similar to
"-Wl,--section-start=.mybuffer=0x800060". Use "avr-nm -ng" on the binary and
search for "usbRxBuf" to find tbe base address of the 22 bytes rx buffer.
Robustness with respect to communication errors:
The driver assumes error-free communication. It DOES check for errors in
the PID, but does NOT check bit stuffing errors, SE0 in middle of a byte,
token CRC (5 bit) and data CRC (16 bit). CRC checks can not be performed due
to timing constraints: We must start sending a reply within 7 bit times.
Bit stuffing and misplaced SE0 would have to be checked in real-time, but CPU
performance does not permit that. The driver does not check Data0/Data1
toggling, but application software can implement the check.
Sampling jitter:
The driver guarantees a sampling window of 1/2 bit. The USB spec requires
that the receiver has at most 1/4 bit sampling window. The 1/2 bit window
should still work reliably enough because we work at low speed. If you want
to meet the spec, define the macro "USB_CFG_SAMPLE_EXACT" to 1 in usbconfig.h.
This will unroll a loop which results in bigger code size.
Input characteristics:
Since no differential receiver circuit is used, electrical interference
robustness may suffer. The driver samples only one of the data lines with
an ordinary I/O pin's input characteristics. However, since this is only a
low speed USB implementation and the specification allows for 8 times the
bit rate over the same hardware, we should be on the safe side. Even the spec
requires detection of asymmetric states at high bit rate for SE0 detection.
Number of endpoints:
The driver supports up to four endpoints: One control endpoint (endpoint 0),
two interrupt-in (or bulk-in) endpoints (endpoint 1 and 3) and one
interrupt-out (or bulk-out) endpoint (endpoint 1). Please note that the USB
standard forbids bulk endpoints for low speed devices! Most operating systems
allow them anyway, but the AVR will spend 90% of the CPU time in the USB
interrupt polling for bulk data.
By default, only the control endpoint 0 is enabled. To get the other endpoints,
define USB_CFG_HAVE_INTRIN_ENDPOINT, USB_CFG_HAVE_INTRIN_ENDPOINT3 and/or
USB_CFG_IMPLEMENT_FN_WRITEOUT respectively (see usbconfig-prototype.h for
details).
Maximum data payload:
Data payload of control in and out transfers may be up to 254 bytes. In order
to accept payload data of out transfers, you need to implement
'usbFunctionWrite()'.
USB Suspend Mode supply current:
The USB standard limits power consumption to 500uA when the bus is in suspend
mode. This is not a problem for self-powered devices since they don't need
bus power anyway. Bus-powered devices can achieve this only by putting the
CPU in sleep mode. The driver does not implement suspend handling by itself.
However, the application may implement activity monitoring and wakeup from
sleep. The host sends regular SE0 states on the bus to keep it active. These
SE0 states can be detected by wiring the INT1 pin to D-. It is not necessary
to enable the interrupt, checking the interrupt pending flag should suffice.
Before entering sleep mode, the application should enable INT1 for a wakeup
on the next bus activity.
Operation without an USB master:
The driver behaves neutral without connection to an USB master if D- reads
as 1. To avoid spurious interrupts, we recommend a high impedance (e.g. 1M)
pullup resistor on D+. If D- becomes statically 0, the driver may block in
the interrupt routine.
Interrupt latency:
The application must ensure that the USB interrupt is not disabled for more
than 20 cycles. This implies that all interrupt routines must either be
declared as "INTERRUPT" instead of "SIGNAL" (see "avr/signal.h") or that they
are written in assembler with "sei" as the first instruction.
Maximum interrupt duration / CPU cycle consumption:
The driver handles all USB communication during the interrupt service
routine. The routine will not return before an entire USB message is received
and the reply is sent. This may be up to ca. 1200 cycles = 100us if the host
conforms to the standard. The driver will consume CPU cycles for all USB
messages, even if they address another (low-speed) device on the same bus.
*/
/* ------------------------------------------------------------------------- */
/* --------------------------- Module Interface ---------------------------- */
/* ------------------------------------------------------------------------- */
#define USBDRV_VERSION 20060718
/* This define uniquely identifies a driver version. It is a decimal number
* constructed from the driver's release date in the form YYYYMMDD. If the
* driver's behavior or interface changes, you can use this constant to
* distinguish versions. If it is not defined, the driver's release date is
* older than 2006-01-25.
*/
#ifndef __ASSEMBLER__
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef schar
#define schar signed char
#endif
/* shortcuts for well defined 8 bit integer types */
struct usbRequest; /* forward declaration */
extern void usbInit(void);
/* This function must be called before interrupts are enabled and the main
* loop is entered.
*/
extern void usbPoll(void);
/* This function must be called at regular intervals from the main loop.
* Maximum delay between calls is somewhat less than 50ms (USB timeout for
* accepting a Setup message). Otherwise the device will not be recognized.
* Please note that debug outputs through the UART take ~ 0.5ms per byte
* at 19200 bps.
*/
extern uchar *usbMsgPtr;
/* This variable may be used to pass transmit data to the driver from the
* implementation of usbFunctionWrite(). It is also used internally by the
* driver for standard control requests.
*/
extern uchar usbFunctionSetup(uchar data[8]);
/* This function is called when the driver receives a SETUP transaction from
* the host which is not answered by the driver itself (in practice: class and
* vendor requests). All control transfers start with a SETUP transaction where
* the host communicates the parameters of the following (optional) data
* transfer. The SETUP data is available in the 'data' parameter which can
* (and should) be casted to 'usbRequest_t *' for a more user-friendly access
* to parameters.
*
* If the SETUP indicates a control-in transfer, you should provide the
* requested data to the driver. There are two ways to transfer this data:
* (1) Set the global pointer 'usbMsgPtr' to the base of the static RAM data
* block and return the length of the data in 'usbFunctionSetup()'. The driver
* will handle the rest. Or (2) return 0xff in 'usbFunctionSetup()'. The driver
* will then call 'usbFunctionRead()' when data is needed. See the
* documentation for usbFunctionRead() for details.
*
* If the SETUP indicates a control-out transfer, the only way to receive the
* data from the host is through the 'usbFunctionWrite()' call. If you
* implement this function, you must return 0xff in 'usbFunctionSetup()' to
* indicate that 'usbFunctionWrite()' should be used. See the documentation of
* this function for more information. If you just want to ignore the data sent
* by the host, return 0 in 'usbFunctionSetup()'.
*
* Note that calls to the functions usbFunctionRead() and usbFunctionWrite()
* are only done if enabled by the configuration in usbconfig.h.
*/
extern uchar usbFunctionDescriptor(struct usbRequest *rq);
/* You need to implement this function ONLY if you provide USB descriptors at
* runtime (which is an expert feature). It is very similar to
* usbFunctionSetup() above, but it is called only to request USB descriptor
* data. See the documentation of usbFunctionSetup() above for more info.
*/
#if USB_CFG_HAVE_INTRIN_ENDPOINT
void usbSetInterrupt(uchar *data, uchar len);
/* This function sets the message which will be sent during the next interrupt
* IN transfer. The message is copied to an internal buffer and must not exceed
* a length of 8 bytes. The message may be 0 bytes long just to indicate the
* interrupt status to the host.
* If you need to transfer more bytes, use a control read after the interrupt.
*/
extern volatile uchar usbTxLen1;
#define usbInterruptIsReady() (usbTxLen1 & 0x10)
/* This macro indicates whether the last interrupt message has already been
* sent. If you set a new interrupt message before the old was sent, the
* message already buffered will be lost.
*/
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
void usbSetInterrupt3(uchar *data, uchar len);
extern volatile uchar usbTxLen3;
#define usbInterruptIsReady3() (usbTxLen3 & 0x10)
/* Same as above for endpoint 3 */
#endif
#endif /* USB_CFG_HAVE_INTRIN_ENDPOINT */
#if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH /* simplified interface for backward compatibility */
#define usbHidReportDescriptor usbDescriptorHidReport
/* should be declared as: PROGMEM char usbHidReportDescriptor[]; */
/* If you implement an HID device, you need to provide a report descriptor.
* The HID report descriptor syntax is a bit complex. If you understand how
* report descriptors are constructed, we recommend that you use the HID
* Descriptor Tool from usb.org, see http://www.usb.org/developers/hidpage/.
* Otherwise you should probably start with a working example.
*/
#endif /* USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH */
#if USB_CFG_IMPLEMENT_FN_WRITE
extern uchar usbFunctionWrite(uchar *data, uchar len);
/* This function is called by the driver to provide a control transfer's
* payload data (control-out). It is called in chunks of up to 8 bytes. The
* total count provided in the current control transfer can be obtained from
* the 'length' property in the setup data. If an error occurred during
* processing, return 0xff (== -1). The driver will answer the entire transfer
* with a STALL token in this case. If you have received the entire payload
* successfully, return 1. If you expect more data, return 0. If you don't
* know whether the host will send more data (you should know, the total is
* provided in the usbFunctionSetup() call!), return 1.
* NOTE: If you return 0xff for STALL, 'usbFunctionWrite()' may still be called
* for the remaining data. You must continue to return 0xff for STALL in these
* calls.
* In order to get usbFunctionWrite() called, define USB_CFG_IMPLEMENT_FN_WRITE
* to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
*/
#endif /* USB_CFG_IMPLEMENT_FN_WRITE */
#if USB_CFG_IMPLEMENT_FN_READ
extern uchar usbFunctionRead(uchar *data, uchar len);
/* This function is called by the driver to ask the application for a control
* transfer's payload data (control-in). It is called in chunks of up to 8
* bytes each. You should copy the data to the location given by 'data' and
* return the actual number of bytes copied. If you return less than requested,
* the control-in transfer is terminated. If you return 0xff, the driver aborts
* the transfer with a STALL token.
* In order to get usbFunctionRead() called, define USB_CFG_IMPLEMENT_FN_READ
* to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
*/
#endif /* USB_CFG_IMPLEMENT_FN_READ */
#if USB_CFG_IMPLEMENT_FN_WRITEOUT
extern void usbFunctionWriteOut(uchar *data, uchar len);
/* This function is called by the driver when data on interrupt-out or bulk-
* out endpoint 1 is received. You must define USB_CFG_IMPLEMENT_FN_WRITEOUT
* to 1 in usbconfig.h to get this function called.
*/
#endif /* USB_CFG_IMPLEMENT_FN_WRITEOUT */
#ifdef USB_CFG_PULLUP_IOPORTNAME
#define usbDeviceConnect() ((USB_PULLUP_DDR |= (1<<USB_CFG_PULLUP_BIT)), \
(USB_PULLUP_OUT |= (1<<USB_CFG_PULLUP_BIT)))
/* This macro (intended to look like a function) connects the device to the
* USB bus. It is only available if you have defined the constants
* USB_CFG_PULLUP_IOPORT and USB_CFG_PULLUP_BIT in usbconfig.h.
*/
#define usbDeviceDisconnect() (USB_PULLUP_OUT &= ~(1<<USB_CFG_PULLUP_BIT))
/* This macro (intended to look like a function) disconnects the device from
* the USB bus. It is only available if you have defined the constants
* USB_CFG_PULLUP_IOPORT and USB_CFG_PULLUP_BIT in usbconfig.h.
*/
#endif /* USB_CFG_PULLUP_IOPORT */
extern unsigned usbCrc16(unsigned data, uchar len);
#define usbCrc16(data, len) usbCrc16((unsigned)(data), len)
/* This function calculates the binary complement of the data CRC used in
* USB data packets. The value is used to build raw transmit packets.
* You may want to use this function for data checksums or to verify received
* data. We enforce 16 bit calling conventions for compatibility with IAR's
* tiny memory model.
*/
extern unsigned usbCrc16Append(unsigned data, uchar len);
#define usbCrc16Append(data, len) usbCrc16Append((unsigned)(data), len)
/* This function is equivalent to usbCrc16() above, except that it appends
* the 2 bytes CRC (lowbyte first) in the 'data' buffer after reading 'len'
* bytes.
*/
extern uchar usbConfiguration;
/* This value contains the current configuration set by the host. The driver
* allows setting and querying of this variable with the USB SET_CONFIGURATION
* and GET_CONFIGURATION requests, but does not use it otherwise.
* You may want to reflect the "configured" status with a LED on the device or
* switch on high power parts of the circuit only if the device is configured.
*/
#define USB_STRING_DESCRIPTOR_HEADER(stringLength) ((2*(stringLength)+2) | (3<<8))
/* This macro builds a descriptor header for a string descriptor given the
* string's length. See usbdrv.c for an example how to use it.
*/
#if USB_CFG_HAVE_FLOWCONTROL
extern volatile schar usbRxLen;
#define usbDisableAllRequests() usbRxLen = -1
/* Must be called from usbFunctionWrite(). This macro disables all data input
* from the USB interface. Requests from the host are answered with a NAK
* while they are disabled.
*/
#define usbEnableAllRequests() usbRxLen = 0
/* May only be called if requests are disabled. This macro enables input from
* the USB interface after it has been disabled with usbDisableAllRequests().
*/
#define usbAllRequestsAreDisabled() (usbRxLen < 0)
/* Use this macro to find out whether requests are disabled. It may be needed
* to ensure that usbEnableAllRequests() is never called when requests are
* enabled.
*/
#endif
extern uchar usbTxPacketCnt1;
extern uchar usbTxPacketCnt3;
/* The two variables above are mostly for internal use by the driver. You may
* have to reset usbTxPacketCnt1 to 0 if you start data toggling at DATA0 for
* interrupt-IN endpoint 1 and usbTxPacketCnt3 for interrupt-IN endpoint 3
* respectively.
*/
#endif /* __ASSEMBLER__ */
/* ------------------------------------------------------------------------- */
/* ----------------- Definitions for Descriptor Properties ----------------- */
/* ------------------------------------------------------------------------- */
/* This is advanced stuff. See usbconfig-prototype.h for more information
* about the various methods to define USB descriptors. If you do nothing,
* the default descriptors will be used.
*/
#define USB_PROP_IS_DYNAMIC (1 << 8)
/* If this property is set for a descriptor, usbFunctionDescriptor() will be
* used to obtain the particular descriptor.
*/
#define USB_PROP_IS_RAM (1 << 9)
/* If this property is set for a descriptor, the data is read from RAM
* memory instead of Flash. The property is used for all methods to provide
* external descriptors.
*/
#define USB_PROP_LENGTH(len) ((len) & 0xff)
/* If a static external descriptor is used, this is the total length of the
* descriptor in bytes.
*/
/* all descriptors which may have properties: */
#ifndef USB_CFG_DESCR_PROPS_DEVICE
#define USB_CFG_DESCR_PROPS_DEVICE 0
#endif
#ifndef USB_CFG_DESCR_PROPS_CONFIGURATION
#define USB_CFG_DESCR_PROPS_CONFIGURATION 0
#endif
#ifndef USB_CFG_DESCR_PROPS_STRINGS
#define USB_CFG_DESCR_PROPS_STRINGS 0
#endif
#ifndef USB_CFG_DESCR_PROPS_STRING_0
#define USB_CFG_DESCR_PROPS_STRING_0 0
#endif
#ifndef USB_CFG_DESCR_PROPS_STRING_VENDOR
#define USB_CFG_DESCR_PROPS_STRING_VENDOR 0
#endif
#ifndef USB_CFG_DESCR_PROPS_STRING_DEVICE
#define USB_CFG_DESCR_PROPS_STRING_DEVICE 0
#endif
#ifndef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER 0
#endif
#ifndef USB_CFG_DESCR_PROPS_HID
#define USB_CFG_DESCR_PROPS_HID 0
#endif
#if !(USB_CFG_DESCR_PROPS_HID_REPORT)
# undef USB_CFG_DESCR_PROPS_HID_REPORT
# if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH /* do some backward compatibility tricks */
# define USB_CFG_DESCR_PROPS_HID_REPORT USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
# else
# define USB_CFG_DESCR_PROPS_HID_REPORT 0
# endif
#endif
#ifndef USB_CFG_DESCR_PROPS_UNKNOWN
#define USB_CFG_DESCR_PROPS_UNKNOWN 0
#endif
/* ------------------ forward declaration of descriptors ------------------- */
/* If you use external static descriptors, they must be stored in global
* arrays as declared below:
*/
#ifndef __ASSEMBLER__
extern
#if !(USB_CFG_DESCR_PROPS_DEVICE & USB_PROP_IS_RAM)
PROGMEM
#endif
char usbDescriptorDevice[];
extern
#if !(USB_CFG_DESCR_PROPS_CONFIGURATION & USB_PROP_IS_RAM)
PROGMEM
#endif
char usbDescriptorConfiguration[];
extern
#if !(USB_CFG_DESCR_PROPS_HID_REPORT & USB_PROP_IS_RAM)
PROGMEM
#endif
char usbDescriptorHidReport[];
extern
#if !(USB_CFG_DESCR_PROPS_STRING_0 & USB_PROP_IS_RAM)
PROGMEM
#endif
char usbDescriptorString0[];
extern
#if !(USB_CFG_DESCR_PROPS_STRING_VENDOR & USB_PROP_IS_RAM)
PROGMEM
#endif
int usbDescriptorStringVendor[];
extern
#if !(USB_CFG_DESCR_PROPS_STRING_PRODUCT & USB_PROP_IS_RAM)
PROGMEM
#endif
int usbDescriptorStringDevice[];
extern
#if !(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER & USB_PROP_IS_RAM)
PROGMEM
#endif
int usbDescriptorStringSerialNumber[];
#endif /* __ASSEMBLER__ */
/* ------------------------------------------------------------------------- */
/* ------------------------ General Purpose Macros ------------------------- */
/* ------------------------------------------------------------------------- */
#define USB_CONCAT(a, b) a ## b
#define USB_CONCAT_EXPANDED(a, b) USB_CONCAT(a, b)
#define USB_OUTPORT(name) USB_CONCAT(PORT, name)
#define USB_INPORT(name) USB_CONCAT(PIN, name)
#define USB_DDRPORT(name) USB_CONCAT(DDR, name)
/* The double-define trick above lets us concatenate strings which are
* defined by macros.
*/
/* ------------------------------------------------------------------------- */
/* ------------------------- Constant definitions -------------------------- */
/* ------------------------------------------------------------------------- */
#if !defined USB_CFG_VENDOR_ID || !defined USB_CFG_DEVICE_ID
static uchar Warning_You_should_define_USB_CFG_VENDOR_ID_and_USB_CFG_DEVICE_ID_in_usbconfig_h;
/* The unused variable above should generate a warning on all compilers. IAR cc
* does not understand the "#warning" preprocessor direcetive.
* If the user has not defined IDs, we default to obdev's free IDs.
* See USBID-License.txt for details.
*/
#endif
/* make sure we have a VID and PID defined, byte order is lowbyte, highbyte */
#ifndef USB_CFG_VENDOR_ID
# define USB_CFG_VENDOR_ID 0xc0, 0x16 /* 5824 in dec, stands for VOTI */
#endif
#ifndef USB_CFG_DEVICE_ID
# if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
# define USB_CFG_DEVICE_ID 0xdf, 0x05 /* 1503 in dec, shared PID for HIDs */
# elif USB_CFG_INTERFACE_CLASS == 2
# define USB_CFG_DEVICE_ID 0xe1, 0x05 /* 1505 in dec, shared PID for CDC Modems */
# else
# define USB_CFG_DEVICE_ID 0xdc, 0x05 /* 1500 in dec, obdev's free PID */
# endif
#endif
#ifndef USB_BUFFER_SECTION
# define USB_BUFFER_SECTION ".bss" /* if user has not selected a named section */
#endif
/* Derive Output, Input and DataDirection ports from port names */
#ifndef USB_CFG_IOPORTNAME
#error "You must define USB_CFG_IOPORTNAME in usbconfig.h, see usbconfig-prototype.h"
#endif
#define USBOUT USB_OUTPORT(USB_CFG_IOPORTNAME)
#define USB_PULLUP_OUT USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
#define USBIN USB_INPORT(USB_CFG_IOPORTNAME)
#define USBDDR USB_DDRPORT(USB_CFG_IOPORTNAME)
#define USB_PULLUP_DDR USB_DDRPORT(USB_CFG_PULLUP_IOPORTNAME)
#define USBMINUS USB_CFG_DMINUS_BIT
#define USBPLUS USB_CFG_DPLUS_BIT
#define USBIDLE (1<<USB_CFG_DMINUS_BIT) /* value representing J state */
#define USBMASK ((1<<USB_CFG_DPLUS_BIT) | (1<<USB_CFG_DMINUS_BIT)) /* mask for USB I/O bits */
/* defines for backward compatibility with older driver versions: */
#define USB_CFG_IOPORT USB_OUTPORT(USB_CFG_IOPORTNAME)
#ifdef USB_CFG_PULLUP_IOPORTNAME
#define USB_CFG_PULLUP_IOPORT USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
#endif
#define USB_BUFSIZE 11 /* PID, 8 bytes data, 2 bytes CRC */
/* ----- Try to find registers and bits responsible for ext interrupt 0 ----- */
#ifndef USB_INTR_CFG /* allow user to override our default */
# if defined EICRA
# define USB_INTR_CFG EICRA
# else
# define USB_INTR_CFG MCUCR
# endif
#endif
#ifndef USB_INTR_CFG_SET /* allow user to override our default */
# define USB_INTR_CFG_SET ((1 << ISC00) | (1 << ISC01)) /* cfg for rising edge */
#endif
#ifndef USB_INTR_CFG_CLR /* allow user to override our default */
# define USB_INTR_CFG_CLR 0 /* no bits to clear */
#endif
#ifndef USB_INTR_ENABLE /* allow user to override our default */
# if defined GIMSK
# define USB_INTR_ENABLE GIMSK
# elif defined EIMSK
# define USB_INTR_ENABLE EIMSK
# else
# define USB_INTR_ENABLE GICR
# endif
#endif
#ifndef USB_INTR_ENABLE_BIT /* allow user to override our default */
# define USB_INTR_ENABLE_BIT INT0
#endif
#ifndef USB_INTR_PENDING /* allow user to override our default */
# if defined EIFR
# define USB_INTR_PENDING EIFR
# else
# define USB_INTR_PENDING GIFR
# endif
#endif
#ifndef USB_INTR_PENDING_BIT /* allow user to override our default */
# define USB_INTR_PENDING_BIT INTF0
#endif
/*
The defines above don't work for the following chips
at90c8534: no ISC0?, no PORTB, can't find a data sheet
at86rf401: no PORTB, no MCUCR etc, low clock rate
atmega103: no ISC0? (maybe omission in header, can't find data sheet)
atmega603: not defined in avr-libc
at43usb320, at43usb355, at76c711: have USB anyway
at94k: is different...
at90s1200, attiny11, attiny12, attiny15, attiny28: these have no RAM
*/
/* ------------------------------------------------------------------------- */
/* ----------------- USB Specification Constants and Types ----------------- */
/* ------------------------------------------------------------------------- */
/* USB Token values */
#define USBPID_SETUP 0x2d
#define USBPID_OUT 0xe1
#define USBPID_IN 0x69
#define USBPID_DATA0 0xc3
#define USBPID_DATA1 0x4b
#define USBPID_ACK 0xd2
#define USBPID_NAK 0x5a
#define USBPID_STALL 0x1e
#ifndef __ASSEMBLER__
typedef union usbWord{
unsigned word;
uchar bytes[2];
}usbWord_t;
typedef struct usbRequest{
uchar bmRequestType;
uchar bRequest;
usbWord_t wValue;
usbWord_t wIndex;
usbWord_t wLength;
}usbRequest_t;
/* This structure matches the 8 byte setup request */
#endif
/* bmRequestType field in USB setup:
* d t t r r r r r, where
* d ..... direction: 0=host->device, 1=device->host
* t ..... type: 0=standard, 1=class, 2=vendor, 3=reserved
* r ..... recipient: 0=device, 1=interface, 2=endpoint, 3=other
*/
/* USB setup recipient values */
#define USBRQ_RCPT_MASK 0x1f
#define USBRQ_RCPT_DEVICE 0
#define USBRQ_RCPT_INTERFACE 1
#define USBRQ_RCPT_ENDPOINT 2
/* USB request type values */
#define USBRQ_TYPE_MASK 0x60
#define USBRQ_TYPE_STANDARD (0<<5)
#define USBRQ_TYPE_CLASS (1<<5)
#define USBRQ_TYPE_VENDOR (2<<5)
/* USB direction values: */
#define USBRQ_DIR_MASK 0x80
#define USBRQ_DIR_HOST_TO_DEVICE (0<<7)
#define USBRQ_DIR_DEVICE_TO_HOST (1<<7)
/* USB Standard Requests */
#define USBRQ_GET_STATUS 0
#define USBRQ_CLEAR_FEATURE 1
#define USBRQ_SET_FEATURE 3
#define USBRQ_SET_ADDRESS 5
#define USBRQ_GET_DESCRIPTOR 6
#define USBRQ_SET_DESCRIPTOR 7
#define USBRQ_GET_CONFIGURATION 8
#define USBRQ_SET_CONFIGURATION 9
#define USBRQ_GET_INTERFACE 10
#define USBRQ_SET_INTERFACE 11
#define USBRQ_SYNCH_FRAME 12
/* USB descriptor constants */
#define USBDESCR_DEVICE 1
#define USBDESCR_CONFIG 2
#define USBDESCR_STRING 3
#define USBDESCR_INTERFACE 4
#define USBDESCR_ENDPOINT 5
#define USBDESCR_HID 0x21
#define USBDESCR_HID_REPORT 0x22
#define USBDESCR_HID_PHYS 0x23
#define USBATTR_BUSPOWER 0x80
#define USBATTR_SELFPOWER 0x40
#define USBATTR_REMOTEWAKE 0x20
/* USB HID Requests */
#define USBRQ_HID_GET_REPORT 0x01
#define USBRQ_HID_GET_IDLE 0x02
#define USBRQ_HID_GET_PROTOCOL 0x03
#define USBRQ_HID_SET_REPORT 0x09
#define USBRQ_HID_SET_IDLE 0x0a
#define USBRQ_HID_SET_PROTOCOL 0x0b
/* ------------------------------------------------------------------------- */
#endif /* __usbdrv_h_included__ */

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/* Name: usbdrvasm.S
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2004-12-29
* Tabsize: 4
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbdrvasm.S,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
/*
General Description:
This module implements the assembler part of the USB driver. See usbdrv.h
for a description of the entire driver.
Since almost all of this code is timing critical, don't change unless you
really know what you are doing! Many parts require not only a maximum number
of CPU cycles, but even an exact number of cycles!
Timing constraints according to spec (in bit times):
timing subject min max CPUcycles
---------------------------------------------------------------------------
EOP of OUT/SETUP to sync pattern of DATA0 (both rx) 2 16 16-128
EOP of IN to sync pattern of DATA0 (rx, then tx) 2 7.5 16-60
DATAx (rx) to ACK/NAK/STALL (tx) 2 7.5 16-60
*/
#include "iarcompat.h"
#ifndef __IAR_SYSTEMS_ASM__
/* configs for io.h */
# define __SFR_OFFSET 0
# define _VECTOR(N) __vector_ ## N /* io.h does not define this for asm */
# include <avr/io.h> /* for CPU I/O register definitions and vectors */
#endif /* __IAR_SYSTEMS_ASM__ */
#include "usbdrv.h" /* for common defs */
/* register names */
#define x1 r16
#define x2 r17
#define shift r18
#define cnt r19
#define x3 r20
#define x4 r21
/* Some assembler dependent definitions and declarations: */
#ifdef __IAR_SYSTEMS_ASM__
# define nop2 rjmp $+2 /* jump to next instruction */
# define XL r26
# define XH r27
# define YL r28
# define YH r29
# define ZL r30
# define ZH r31
# define lo8(x) LOW(x)
# define hi8(x) ((x)>>8) /* not HIGH to allow XLINK to make a proper range check */
extern usbRxBuf, usbDeviceAddr, usbNewDeviceAddr, usbInputBuf
extern usbCurrentTok, usbRxLen, usbRxToken, usbAppBuf, usbTxLen
extern usbTxBuf, usbMsgLen, usbTxLen1, usbTxBuf1, usbTxLen3, usbTxBuf3
public usbCrc16
public usbCrc16Append
COMMON INTVEC
ORG INT0_vect
rjmp SIG_INTERRUPT0
RSEG CODE
#else /* __IAR_SYSTEMS_ASM__ */
# define nop2 rjmp .+0 /* jump to next instruction */
.text
.global SIG_INTERRUPT0
.type SIG_INTERRUPT0, @function
.global usbCrc16
.global usbCrc16Append
#endif /* __IAR_SYSTEMS_ASM__ */
SIG_INTERRUPT0:
;Software-receiver engine. Strict timing! Don't change unless you can preserve timing!
;interrupt response time: 4 cycles + insn running = 7 max if interrupts always enabled
;max allowable interrupt latency: 32 cycles -> max 25 cycles interrupt disable
;max stack usage: [ret(2), x1, SREG, x2, cnt, shift, YH, YL, x3, x4] = 11 bytes
usbInterrupt:
;order of registers pushed:
;x1, SREG, x2, cnt, shift, [YH, YL, x3]
push x1 ;2 push only what is necessary to sync with edge ASAP
in x1, SREG ;1
push x1 ;2
;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K]
;sync up with J to K edge during sync pattern -- use fastest possible loops
;first part has no timeout because it waits for IDLE or SE1 (== disconnected)
#if !USB_CFG_SAMPLE_EXACT
ldi x1, 5 ;1 setup a timeout for waitForK
#endif
waitForJ:
sbis USBIN, USBMINUS ;1 wait for D- == 1
rjmp waitForJ ;2
#if USB_CFG_SAMPLE_EXACT
;The following code represents the unrolled loop in the else branch. It
;results in a sampling window of 1/4 bit which meets the spec.
sbis USBIN, USBMINUS
rjmp foundK
sbis USBIN, USBMINUS
rjmp foundK
sbis USBIN, USBMINUS
rjmp foundK
nop
nop2
foundK:
#else
waitForK:
dec x1 ;1
sbic USBIN, USBMINUS ;1 wait for D- == 0
brne waitForK ;2
#endif
;{2, 6} after falling D- edge, average delay: 4 cycles [we want 4 for center sampling]
;we have 1 bit time for setup purposes, then sample again:
push x2 ;2
push cnt ;2
push shift ;2
shortcutEntry:
ldi cnt, 1 ;1 pre-init bit counter (-1 because no dec follows, -1 because 1 bit already sampled)
ldi x2, 1<<USB_CFG_DPLUS_BIT ;1 -> 8 edge sync ended with D- == 0
;now wait until SYNC byte is over. Wait for either 2 bits low (success) or 2 bits high (failure)
waitNoChange:
in x1, USBIN ;1 <-- sample, timing: edge + {2, 6} cycles
eor x2, x1 ;1
sbrc x2, USBMINUS ;1 | 2
ldi cnt, 2 ;1 | 0 cnt = numBits - 1 (because dec follows)
mov x2, x1 ;1
dec cnt ;1
brne waitNoChange ;2 | 1
sbrc x1, USBMINUS ;2
rjmp sofError ;0 two consecutive "1" bits -> framing error
;start reading data, but don't check for bitstuffing because these are the
;first bits. Use the cycles for initialization instead. Note that we read and
;store the binary complement of the data stream because eor results in 1 for
;a change and 0 for no change.
in x1, USBIN ;1 <-- sample bit 0, timing: edge + {3, 7} cycles
eor x2, x1 ;1
ldi shift, 0x00 ;1 prepare for bitstuff check later on in loop
bst x2, USBMINUS ;1
bld shift, 0 ;1
push YH ;2 -> 7
in x2, USBIN ;1 <-- sample bit 1, timing: edge + {2, 6} cycles
eor x1, x2 ;1
bst x1, USBMINUS ;1
bld shift, 1 ;1
push YL ;2
lds YL, usbInputBuf ;2 -> 8
in x1, USBIN ;1 <-- sample bit 2, timing: edge + {2, 6} cycles
eor x2, x1 ;1
bst x2, USBMINUS ;1
bld shift, 2 ;1
ldi cnt, USB_BUFSIZE;1
ldi YH, hi8(usbRxBuf);1 assume that usbRxBuf does not cross a page
push x3 ;2 -> 8
in x2, USBIN ;1 <-- sample bit 3, timing: edge + {2, 6} cycles
eor x1, x2 ;1
bst x1, USBMINUS ;1
bld shift, 3 ;1
ser x3 ;1
nop ;1
rjmp rxbit4 ;2 -> 8
shortcutToStart: ;{,43} into next frame: max 5.5 sync bits missed
#if !USB_CFG_SAMPLE_EXACT
ldi x1, 5 ;2 setup timeout
#endif
waitForJ1:
sbis USBIN, USBMINUS ;1 wait for D- == 1
rjmp waitForJ1 ;2
#if USB_CFG_SAMPLE_EXACT
;The following code represents the unrolled loop in the else branch. It
;results in a sampling window of 1/4 bit which meets the spec.
sbis USBIN, USBMINUS
rjmp foundK1
sbis USBIN, USBMINUS
rjmp foundK1
sbis USBIN, USBMINUS
rjmp foundK1
nop
nop2
foundK1:
#else
waitForK1:
dec x1 ;1
sbic USBIN, USBMINUS ;1 wait for D- == 0
brne waitForK1 ;2
#endif
pop YH ;2 correct stack alignment
nop2 ;2 delay for the same time as the pushes in the original code
rjmp shortcutEntry ;2
; ################# receiver loop #################
; extra jobs done during bit interval:
; bit 6: se0 check
; bit 7: or, store, clear
; bit 0: recover from delay [SE0 is unreliable here due to bit dribbling in hubs]
; bit 1: se0 check
; bit 2: se0 check
; bit 3: overflow check
; bit 4: se0 check
; bit 5: rjmp
; stuffed* helpers have the functionality of a subroutine, but we can't afford
; the overhead of a call. We therefore need a separate routine for each caller
; which jumps back appropriately.
stuffed5: ;1 for branch taken
in x2, USBIN ;1 <-- sample @ +1
andi x2, USBMASK ;1
breq se0a ;1
andi x3, ~0x20 ;1
ori shift, 0x20 ;1
rjmp rxbit6 ;2
stuffed6: ;1 for branch taken
in x1, USBIN ;1 <-- sample @ +1
andi x1, USBMASK ;1
breq se0a ;1
andi x3, ~0x40 ;1
ori shift, 0x40 ;1
rjmp rxbit7 ;2
; This is somewhat special because it has to compensate for the delay in bit 7
stuffed7: ;1 for branch taken
andi x1, USBMASK ;1 already sampled by caller
breq se0a ;1
mov x2, x1 ;1 ensure correct NRZI sequence
ori shift, 0x80 ;1 no need to set reconstruction in x3: shift has already been used
in x1, USBIN ;1 <-- sample bit 0
rjmp unstuffed7 ;2
stuffed0: ;1 for branch taken
in x1, USBIN ;1 <-- sample @ +1
andi x1, USBMASK ;1
breq se0a ;1
andi x3, ~0x01 ;1
ori shift, 0x01 ;1
rjmp rxbit1 ;2
;-----------------------------
rxLoop:
breq stuffed5 ;1
rxbit6:
in x1, USBIN ;1 <-- sample bit 6
andi x1, USBMASK ;1
breq se0a ;1
eor x2, x1 ;1
bst x2, USBMINUS;1
bld shift, 6 ;1
cpi shift, 0x02 ;1
brlo stuffed6 ;1
rxbit7:
in x2, USBIN ;1 <-- sample bit 7
eor x1, x2 ;1
bst x1, USBMINUS;1
bld shift, 7 ;1
eor x3, shift ;1 x3 is 0 at bit locations we changed, 1 at others
st y+, x3 ;2 the eor above reconstructed modified bits and inverted rx data
ser x3 ;1
rxbit0:
in x1, USBIN ;1 <-- sample bit 0
cpi shift, 0x04 ;1
brlo stuffed7 ;1
unstuffed7:
eor x2, x1 ;1
bst x2, USBMINUS;1
bld shift, 0 ;1
andi shift, 0xf9 ;1
breq stuffed0 ;1
rxbit1:
in x2, USBIN ;1 <-- sample bit 1
andi x2, USBMASK ;1
se0a: ; enlarge jump range to SE0
breq se0 ;1 check for SE0 more often close to start of byte
eor x1, x2 ;1
bst x1, USBMINUS;1
bld shift, 1 ;1
andi shift, 0xf3 ;1
breq stuffed1 ;1
rxbit2:
in x1, USBIN ;1 <-- sample bit 2
andi x1, USBMASK ;1
breq se0 ;1
eor x2, x1 ;1
bst x2, USBMINUS;1
bld shift, 2 ;1
andi shift, 0xe7 ;1
breq stuffed2 ;1
rxbit3:
in x2, USBIN ;1 <-- sample bit 3
eor x1, x2 ;1
bst x1, USBMINUS;1
bld shift, 3 ;1
dec cnt ;1 check for buffer overflow
breq overflow ;1
andi shift, 0xcf ;1
breq stuffed3 ;1
rxbit4:
in x1, USBIN ;1 <-- sample bit 4
andi x1, USBMASK ;1
breq se0 ;1
eor x2, x1 ;1
bst x2, USBMINUS;1
bld shift, 4 ;1
andi shift, 0x9f ;1
breq stuffed4 ;1
rxbit5:
in x2, USBIN ;1 <-- sample bit 5
eor x1, x2 ;1
bst x1, USBMINUS;1
bld shift, 5 ;1
andi shift, 0x3f ;1
rjmp rxLoop ;2
;-----------------------------
stuffed1: ;1 for branch taken
in x2, USBIN ;1 <-- sample @ +1
andi x2, USBMASK ;1
breq se0 ;1
andi x3, ~0x02 ;1
ori shift, 0x02 ;1
rjmp rxbit2 ;2
stuffed2: ;1 for branch taken
in x1, USBIN ;1 <-- sample @ +1
andi x1, USBMASK ;1
breq se0 ;1
andi x3, ~0x04 ;1
ori shift, 0x04 ;1
rjmp rxbit3 ;2
stuffed3: ;1 for branch taken
in x2, USBIN ;1 <-- sample @ +1
andi x2, USBMASK ;1
breq se0 ;1
andi x3, ~0x08 ;1
ori shift, 0x08 ;1
rjmp rxbit4 ;2
stuffed4: ;1 for branch taken
in x1, USBIN ;1 <-- sample @ +1
andi x1, USBMASK ;1
breq se0 ;1
andi x3, ~0x10 ;1
ori shift, 0x10 ;1
rjmp rxbit5 ;2
;################ end receiver loop ###############
overflow: ; ignore package if buffer overflow
rjmp rxDoReturn ; enlarge jump range
;This is the only non-error exit point for the software receiver loop
;{4, 20} cycles after start of SE0, typically {10, 18} after SE0 start = {-6, 2} from end of SE0
;next sync starts {16,} cycles after SE0 -> worst case start: +4 from next sync start
;we don't check any CRCs here because there is no time left.
se0: ;{-6, 2} from end of SE0 / {,4} into next frame
mov cnt, YL ;1 assume buffer in lower 256 bytes of memory
lds YL, usbInputBuf ;2 reposition to buffer start
sub cnt, YL ;1 length of message
ldi x1, 1<<USB_INTR_PENDING_BIT ;1
cpi cnt, 3 ;1
out USB_INTR_PENDING, x1;1 clear pending intr and check flag later. SE0 must be over. {,10} into next frame
brlo rxDoReturn ;1 ensure valid packet size, ignore others
ld x1, y ;2 PID
ldd x2, y+1 ;2 ADDR + 1 bit endpoint number
mov x3, x2 ;1 store for endpoint number
andi x2, 0x7f ;1 mask endpoint number bit
lds shift, usbDeviceAddr;2
cpi x1, USBPID_SETUP ;1
breq isSetupOrOut ;2 -> 19 = {13, 21} from SE0 end
cpi x1, USBPID_OUT ;1
breq isSetupOrOut ;2 -> 22 = {16, 24} from SE0 end / {,24} into next frame
cpi x1, USBPID_IN ;1
breq handleIn ;1
#define USB_DATA_MASK ~(USBPID_DATA0 ^ USBPID_DATA1)
andi x1, USB_DATA_MASK ;1
cpi x1, USBPID_DATA0 & USB_DATA_MASK ;1
brne rxDoReturn ;1 not a data PID -- ignore
isData:
lds x2, usbCurrentTok ;2
tst x2 ;1
breq rxDoReturn ;1 for other device or spontaneous data -- ignore
lds x1, usbRxLen ;2
cpi x1, 0 ;1
brne sendNakAndReti ;1 no buffer space available / {30, 38} from SE0 end
; 2006-03-11: The following two lines fix a problem where the device was not
; recognized if usbPoll() was called less frequently than once every 4 ms.
cpi cnt, 4 ;1 zero sized data packets are status phase only -- ignore and ack
brmi sendAckAndReti ;1 keep rx buffer clean -- we must not NAK next SETUP
sts usbRxLen, cnt ;2 store received data, swap buffers
sts usbRxToken, x2 ;2
lds x1, usbAppBuf ;2
sts usbAppBuf, YL ;2
sts usbInputBuf, x1 ;2 buffers now swapped
rjmp sendAckAndReti ;2 -> {43, 51} from SE0 end
handleIn: ; {18, 26} from SE0 end
cp x2, shift ;1 shift contains our device addr
brne rxDoReturn ;1 other device
#if USB_CFG_HAVE_INTRIN_ENDPOINT
sbrc x3, 7 ;2 x3 contains addr + endpoint
rjmp handleIn1 ;0
#endif
lds cnt, usbTxLen ;2
sbrc cnt, 4 ;2
rjmp sendCntAndReti ;0 -> {27, 35} from SE0 end
ldi x1, USBPID_NAK ;1
sts usbTxLen, x1 ;2 buffer is now free
ldi YL, lo8(usbTxBuf) ;1
ldi YH, hi8(usbTxBuf) ;1
rjmp usbSendAndReti ;2 -> {34, 43} from SE0 end
; Comment about when to set usbTxLen to USBPID_NAK:
; We should set it back when we receive the ACK from the host. This would
; be simple to implement: One static variable which stores whether the last
; tx was for endpoint 0 or 1 and a compare in the receiver to distinguish the
; ACK. However, we set it back immediately when we send the package,
; assuming that no error occurs and the host sends an ACK. We save one byte
; RAM this way and avoid potential problems with endless retries. The rest of
; the driver assumes error-free transfers anyway.
otherOutOrSetup:
clr x1
sts usbCurrentTok, x1
rxDoReturn:
pop x3 ;2
pop YL ;2
pop YH ;2
rjmp sofError ;2
isSetupOrOut: ; we must be fast here -- a data package may follow / {,24} into next frame
cp x2, shift ;1 shift contains our device addr
brne otherOutOrSetup ;1 other device -- ignore
#if USB_CFG_IMPLEMENT_FN_WRITEOUT /* if we need second OUT endpoint, store endpoint address */
andi x1, 0x7f ;1 mask out MSb in token
andi x3, 0x80 ;1 mask out all but endpoint address
or x1, x3 ;1 merge endpoint into currentToken
sts usbCurrentTok, x1 ;2
brmi dontResetEP0 ;1 endpoint 1 -> don't reset endpoint 0 input
#else
sts usbCurrentTok, x1 ;2
#endif
;A transmission can still have data in the output buffer while we receive a
;SETUP package with an IN phase. To avoid that the old data is sent as a reply,
;we abort transmission. We don't need to reset usbMsgLen because it is used
;from the main loop only where the setup is processed anyway.
ldi x1, USBPID_NAK ;1
sts usbTxLen, x1 ;2 abort transmission
dontResetEP0:
pop x3 ;2
pop YL ;2
in x1, USB_INTR_PENDING;1
sbrc x1, USB_INTR_PENDING_BIT;1 check whether data is already arriving {,41} into next frame
rjmp shortcutToStart ;2 save the pops and pushes -- a new interrupt is aready pending
;If the jump above was not taken, we can be at {,2} into the next frame here
pop YH ;2
txDoReturn:
sofError: ; error in start of frame -- ignore frame
ldi x1, 1<<USB_INTR_PENDING_BIT;1 many int0 events occurred during our processing -- clear pending flag
out USB_INTR_PENDING, x1;1
pop shift ;2
pop cnt ;2
pop x2 ;2
pop x1 ;2
out SREG, x1 ;1
pop x1 ;2
reti ;4 -> {,21} into next frame -> up to 3 sync bits missed
sendCntAndReti: ; 19 cycles until SOP
mov x3, cnt ;1
rjmp usbSendX3 ;2
sendNakAndReti: ; 19 cycles until SOP
ldi x3, USBPID_NAK ;1
rjmp usbSendX3 ;2
sendAckAndReti: ; 17 cycles until SOP
ldi x3, USBPID_ACK ;1
usbSendX3:
ldi YL, 20 ;1 'x3' is R20
ldi YH, 0 ;1
ldi cnt, 2 ;1
;;;;rjmp usbSendAndReti fallthrough
; USB spec says:
; idle = J
; J = (D+ = 0), (D- = 1) or USBOUT = 0x01
; K = (D+ = 1), (D- = 0) or USBOUT = 0x02
; Spec allows 7.5 bit times from EOP to SOP for replies (= 60 cycles)
;usbSend:
;pointer to data in 'Y'
;number of bytes in 'cnt' -- including sync byte
;uses: x1...x4, shift, cnt, Y
usbSendAndReti: ; SOP starts 13 cycles after call
push x4 ;2
ldi x4, USBMASK ;1 exor mask
sbi USBOUT, USBMINUS;1 prepare idle state; D+ and D- must have been 0 (no pullups)
in x1, USBOUT ;1 port mirror for tx loop
sbi USBDDR, USBMINUS;1
sbi USBDDR, USBPLUS ;1 set D+ and D- to output: acquire bus
; need not init x2 (bitstuff history) because sync starts with 0
ldi shift, 0x80 ;1 sync byte is first byte sent
rjmp txLoop ;2 -> 13 + 3 = 16 cycles until SOP
#if USB_CFG_HAVE_INTRIN_ENDPOINT /* placed here due to relative jump range */
handleIn1: ;{23, 31} from SE0
ldi x1, USBPID_NAK ;1
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
; 2006-06-10 as suggested by O.Tamura: support second INTR IN / BULK IN endpoint
ldd x2, y+2 ;2
sbrc x2, 0 ;2 1
rjmp handleIn3 ;0 2
#endif
lds cnt, usbTxLen1 ;2
sbrc cnt, 4 ;2
rjmp sendCntAndReti ;0
sts usbTxLen1, x1 ;2
ldi YL, lo8(usbTxBuf1);1
ldi YH, hi8(usbTxBuf1);1
rjmp usbSendAndReti ;2 -> arrives at usbSendAndReti {34, 42} from SE0
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
handleIn3:
lds cnt, usbTxLen3 ;2
sbrc cnt, 4 ;2
rjmp sendCntAndReti ;0
sts usbTxLen3, x1 ;2
ldi YL, lo8(usbTxBuf3);1
ldi YH, hi8(usbTxBuf3);1
rjmp usbSendAndReti ;2 -> arrives at usbSendAndReti {39, 47} from SE0
#endif
#endif
bitstuff0: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
out USBOUT, x1 ;1 <-- out
rjmp didStuff0 ;2 branch back 2 cycles earlier
bitstuff1: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
sec ;1 set carry so that brsh will not jump
out USBOUT, x1 ;1 <-- out
rjmp didStuff1 ;2 jump back 1 cycle earler
bitstuff2: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
rjmp didStuff2 ;2 jump back 3 cycles earlier and do out
bitstuff3: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
rjmp didStuff3 ;2 jump back earlier
txLoop:
sbrs shift, 0 ;1
eor x1, x4 ;1
out USBOUT, x1 ;1 <-- out
ror shift ;1
ror x2 ;1
didStuff0:
cpi x2, 0xfc ;1
brsh bitstuff0 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
out USBOUT, x1 ;1 <-- out
ror x2 ;1
cpi x2, 0xfc ;1
didStuff1:
brsh bitstuff1 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
ror x2 ;1
didStuff2:
out USBOUT, x1 ;1 <-- out
cpi x2, 0xfc ;1
brsh bitstuff2 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
ror x2 ;1
didStuff3:
cpi x2, 0xfc ;1
out USBOUT, x1 ;1 <-- out
brsh bitstuff3 ;1
nop2 ;2
ld x3, y+ ;2
sbrs shift, 0 ;1
eor x1, x4 ;1
out USBOUT, x1 ;1 <-- out
ror shift ;1
ror x2 ;1
didStuff4:
cpi x2, 0xfc ;1
brsh bitstuff4 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
out USBOUT, x1 ;1 <-- out
ror x2 ;1
cpi x2, 0xfc ;1
didStuff5:
brsh bitstuff5 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
ror x2 ;1
didStuff6:
out USBOUT, x1 ;1 <-- out
cpi x2, 0xfc ;1
brsh bitstuff6 ;1
sbrs shift, 0 ;1
eor x1, x4 ;1
ror shift ;1
ror x2 ;1
didStuff7:
cpi x2, 0xfc ;1
out USBOUT, x1 ;1 <-- out
brsh bitstuff7 ;1
mov shift, x3 ;1
dec cnt ;1
brne txLoop ;2 | 1
cbr x1, USBMASK ;1 prepare SE0 [spec says EOP may be 15 to 18 cycles]
pop x4 ;2
out USBOUT, x1 ;1 <-- out SE0 -- from now 2 bits = 16 cycles until bus idle
ldi cnt, 2 ;| takes cnt * 3 cycles
se0Delay: ;|
dec cnt ;|
brne se0Delay ;| -> 2 * 3 = 6 cycles
;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm:
;set address only after data packet was sent, not after handshake
lds x2, usbNewDeviceAddr;2
subi YL, 20 + 2 ;1
sbci YH, 0 ;1
breq skipAddrAssign ;2
sts usbDeviceAddr, x2 ;0 if not skipped: SE0 is one cycle longer
skipAddrAssign:
;end of usbDeviceAddress transfer
ori x1, USBIDLE ;1
in x2, USBDDR ;1
cbr x2, USBMASK ;1 set both pins to input
out USBOUT, x1 ;1 <-- out J (idle) -- end of SE0 (EOP signal)
cbr x1, USBMASK ;1 configure no pullup on both pins
pop x3 ;2
pop YL ;2
out USBDDR, x2 ;1 <-- release bus now
out USBOUT, x1 ;1 set pullup state
pop YH ;2
rjmp txDoReturn ;2 [we want to jump to rxDoReturn, but this saves cycles]
bitstuff4: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
out USBOUT, x1 ;1 <-- out
rjmp didStuff4 ;2 jump back 2 cycles earlier
bitstuff5: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
sec ;1 set carry so that brsh is not taken
out USBOUT, x1 ;1 <-- out
rjmp didStuff5 ;2 jump back 1 cycle earlier
bitstuff6: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
rjmp didStuff6 ;2 jump back 3 cycles earlier and do out there
bitstuff7: ;1 (for branch taken)
eor x1, x4 ;1
ldi x2, 0 ;1
rjmp didStuff7 ;2 jump back 4 cycles earlier
; ######################## utility functions ########################
#ifdef __IAR_SYSTEMS_ASM__
/* Register assignments for usbCrc16 on IAR cc */
/* Calling conventions on IAR:
* First parameter passed in r16/r17, second in r18/r19 and so on.
* Callee must preserve r4-r15, r24-r29 (r28/r29 is frame pointer)
* Result is passed in r16/r17
* In case of the "tiny" memory model, pointers are only 8 bit with no
* padding. We therefore pass argument 1 as "16 bit unsigned".
*/
RTMODEL "__rt_version", "3"
/* The line above will generate an error if cc calling conventions change.
* The value "3" above is valid for IAR 4.10B/W32
*/
# define argLen r18 /* argument 2 */
# define argPtrL r16 /* argument 1 */
# define argPtrH r17 /* argument 1 */
# define resCrcL r16 /* result */
# define resCrcH r17 /* result */
# define ptrL ZL
# define ptrH ZH
# define ptr Z
# define byte r22
# define bitCnt r19
# define polyL r20
# define polyH r21
# define scratch r23
#else /* __IAR_SYSTEMS_ASM__ */
/* Register assignments for usbCrc16 on gcc */
/* Calling conventions on gcc:
* First parameter passed in r24/r25, second in r22/23 and so on.
* Callee must preserve r1-r17, r28/r29
* Result is passed in r24/r25
*/
# define argLen r22 /* argument 2 */
# define argPtrL r24 /* argument 1 */
# define argPtrH r25 /* argument 1 */
# define resCrcL r24 /* result */
# define resCrcH r25 /* result */
# define ptrL XL
# define ptrH XH
# define ptr x
# define byte r18
# define bitCnt r19
# define polyL r20
# define polyH r21
# define scratch r23
#endif
; extern unsigned usbCrc16(unsigned char *data, unsigned char len);
; data: r24/25
; len: r22
; temp variables:
; r18: data byte
; r19: bit counter
; r20/21: polynomial
; r23: scratch
; r24/25: crc-sum
; r26/27=X: ptr
usbCrc16:
mov ptrL, argPtrL
mov ptrH, argPtrH
ldi resCrcL, 0xff
ldi resCrcH, 0xff
ldi polyL, lo8(0xa001)
ldi polyH, hi8(0xa001)
crcByteLoop:
subi argLen, 1
brcs crcReady
ld byte, ptr+
ldi bitCnt, 8
crcBitLoop:
mov scratch, byte
eor scratch, resCrcL
lsr resCrcH
ror resCrcL
lsr byte
sbrs scratch, 0
rjmp crcNoXor
eor resCrcL, polyL
eor resCrcH, polyH
crcNoXor:
dec bitCnt
brne crcBitLoop
rjmp crcByteLoop
crcReady:
com resCrcL
com resCrcH
ret
; extern unsigned usbCrc16Append(unsigned char *data, unsigned char len);
usbCrc16Append:
rcall usbCrc16
st ptr+, resCrcL
st ptr+, resCrcH
ret

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/* Name: usbdrvasm.asm
* Project: AVR USB driver
* Author: Christian Starkjohann
* Creation Date: 2006-03-01
* Tabsize: 4
* Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usbdrvasm.asm,v 1.1 2006/09/26 18:18:27 rschaten Exp $
*/
/*
General Description:
The IAR compiler/assembler system prefers assembler files with file extension
".asm". We simply provide this file as an alias for usbdrvasm.S.
Thanks to Oleg Semyonov for his help with the IAR tools port!
*/
#include "usbdrvasm.S"
end

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