136 lines
6.2 KiB
Plaintext
136 lines
6.2 KiB
Plaintext
This file documents changes in the firmware-only USB driver for atmel's AVR
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microcontrollers. New entries are always appended to the end of the file.
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Scroll down to the bottom to see the most recent changes.
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2005-04-01:
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- Implemented endpoint 1 as interrupt-in endpoint.
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- Moved all configuration options to usbconfig.h which is not part of the
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driver.
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- Changed interface for usbVendorSetup().
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- Fixed compatibility with ATMega8 device.
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- Various minor optimizations.
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2005-04-11:
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- Changed interface to application: Use usbFunctionSetup(), usbFunctionRead()
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and usbFunctionWrite() now. Added configuration options to choose which
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of these functions to compile in.
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- Assembler module delivers receive data non-inverted now.
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- Made register and bit names compatible with more AVR devices.
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2005-05-03:
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- Allow address of usbRxBuf on any memory page as long as the buffer does
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not cross 256 byte page boundaries.
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- Better device compatibility: works with Mega88 now.
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- Code optimization in debugging module.
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- Documentation updates.
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2006-01-02:
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- Added (free) default Vendor- and Product-IDs bought from voti.nl.
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- Added USBID-License.txt file which defines the rules for using the free
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shared VID/PID pair.
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- Added Readme.txt to the usbdrv directory which clarifies administrative
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issues.
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2006-01-25:
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- Added "configured state" to become more standards compliant.
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- Added "HALT" state for interrupt endpoint.
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- Driver passes the "USB Command Verifier" test from usb.org now.
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- Made "serial number" a configuration option.
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- Minor optimizations, we now recommend compiler option "-Os" for best
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results.
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- Added a version number to usbdrv.h
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2006-02-03:
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- New configuration variable USB_BUFFER_SECTION for the memory section where
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the USB rx buffer will go. This defaults to ".bss" if not defined. Since
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this buffer MUST NOT cross 256 byte pages (not even touch a page at the
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end), the user may want to pass a linker option similar to
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"-Wl,--section-start=.mybuffer=0x800060".
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- Provide structure for usbRequest_t.
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- New defines for USB constants.
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- Prepared for HID implementations.
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- Increased data size limit for interrupt transfers to 8 bytes.
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- New macro usbInterruptIsReady() to query interrupt buffer state.
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2006-02-18:
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- Ensure that the data token which is sent as an ack to an OUT transfer is
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always zero sized. This fixes a bug where the host reports an error after
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sending an out transfer to the device, although all data arrived at the
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device.
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- Updated docs in usbdrv.h to reflect changed API in usbFunctionWrite().
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* Release 2006-02-20
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- Give a compiler warning when compiling with debugging turned on.
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- Added Oleg Semyonov's changes for IAR-cc compatibility.
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- Added new (optional) functions usbDeviceConnect() and usbDeviceDisconnect()
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(also thanks to Oleg!).
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- Rearranged tests in usbPoll() to save a couple of instructions in the most
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likely case that no actions are pending.
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- We need a delay between the SET ADDRESS request until the new address
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becomes active. This delay was handled in usbPoll() until now. Since the
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spec says that the delay must not exceed 2ms, previous versions required
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aggressive polling during the enumeration phase. We have now moved the
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handling of the delay into the interrupt routine.
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- We must not reply with NAK to a SETUP transaction. We can only achieve this
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by making sure that the rx buffer is empty when SETUP tokens are expected.
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We therefore don't pass zero sized data packets from the status phase of
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a transfer to usbPoll(). This change MAY cause troubles if you rely on
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receiving a less than 8 bytes long packet in usbFunctionWrite() to
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identify the end of a transfer. usbFunctionWrite() will NEVER be called
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with a zero length.
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* Release 2006-03-14
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- Improved IAR C support: tiny memory model, more devices
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- Added template usbconfig.h file under the name usbconfig-prototype.h
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* Release 2006-03-26
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- Added provision for one more interrupt-in endpoint (endpoint 3).
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- Added provision for one interrupt-out endpoint (endpoint 1).
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- Added flowcontrol macros for USB.
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- Added provision for custom configuration descriptor.
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- Allow ANY two port bits for D+ and D-.
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- Merged (optional) receive endpoint number into global usbRxToken variable.
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- Use USB_CFG_IOPORTNAME instead of USB_CFG_IOPORT. We now construct the
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variable name from the single port letter instead of computing the address
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of related ports from the output-port address.
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* Release 2006-06-26
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- Updated documentation in usbdrv.h and usbconfig-prototype.h to reflect the
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new features.
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- Removed "#warning" directives because IAR does not understand them. Use
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unused static variables instead to generate a warning.
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- Do not include <avr/io.h> when compiling with IAR.
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- Introduced USB_CFG_DESCR_PROPS_* in usbconfig.h to configure how each
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USB descriptor should be handled. It is now possible to provide descriptor
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data in Flash, RAM or dynamically at runtime.
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- STALL is now a status in usbTxLen* instead of a message. We can now conform
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to the spec and leave the stall status pending until it is cleared.
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- Made usbTxPacketCnt1 and usbTxPacketCnt3 public. This allows the
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application code to reset data toggling on interrupt pipes.
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* Release 2006-07-18
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- Added an #if !defined __ASSEMBLER__ to the warning in usbdrv.h. This fixes
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an assembler error.
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- usbDeviceDisconnect() takes pull-up resistor to high impedance now.
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* Release 2007-02-01
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- Merged in some code size improvements from usbtiny (thanks to Dick
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Streefland for these optimizations!)
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- Special alignment requirement for usbRxBuf not required any more. Thanks
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again to Dick Streefland for this hint!
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- Reverted to "#warning" instead of unused static variables -- new versions
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of IAR CC should handle this directive.
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- Changed Open Source license to GNU GPL v2 in order to make linking against
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other free libraries easier. We no longer require publication of the
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circuit diagrams, but we STRONGLY encourage it. If you improve the driver
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itself, PLEASE grant us a royalty free license to your changes for our
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commercial license.
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* Release 2007-03-29
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