# $Id: Makefile,v 1.1 2007/07/29 17:19:50 rschaten Exp $

# microcontroller settings
F_CPU = 20000000UL
MCU = attiny2313

# usb programmer:
AVRDUDE = avrdude -p $(MCU) -P /dev/tts/USB0 -b 115200 -c avr109
# parallel programmer, used to set fuse bits:
AVRDUDE2 = avrdude -p $(MCU) -P /dev/parport0 -c stk200 -E noreset,vcc


COMPILE = avr-gcc -Wall -Os -I../common -I. -mmcu=$(MCU)  -DF_CPU=$(F_CPU) -Wa,-ahlms=$(<:.c=.lst) #-DDEBUG_LEVEL=2

OBJECTS = main.o usiTwiSlave.o

TODAY=`date "+%y%m%d"`
DIR=`basename \`pwd\``
PACKETNAME=$(DIR)_$(TODAY)

all: usage

usage:
	@echo "Usage of this makefile:"
	@echo "make firmware   create firmware"
	@echo "make program    send firmware to the device"
	@echo "make fuses      set fuses of the device"
	@echo "make docs       create documentation"
	@echo "make tarball    packs a tarball for shipping"
	@echo "make clean      tidy the directory"
	@echo
	@echo "For further information, consult the documentation in Readme.txt."

# symbolic targets:
firmware: main.hex

.c.o:
	$(COMPILE) -c $< -o $@

.c.s:
	$(COMPILE) -S $< -o $@

program: firmware
	$(AVRDUDE) -U flash:w:main.hex

# Fuse low byte:
# 0xef = 1 1 1 0   1 1 1 1
#        ^ ^ \+/   \--+--/
#        | |  |       +------- CKSEL 3..0 (clock selection -> crystal @ 12 MHz)
#        | |  +--------------- SUT 1..0 (BOD enabled, fast rising power)
#        | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
#        +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
#
# Fuse high byte:
# 0xdb = 1 1 0 1   1 0 1 1
#        ^ ^ ^ ^   \-+-/ ^
#        | | | |     |   +---- RSTDISBL (disable external reset -> enabled)
#        | | | |     +-------- BODLEVEL 2..0 (brownout trigger level -> 2.7V)
#        | | | +-------------- WDTON (watchdog timer always on -> disable)
#        | | +---------------- SPIEN (enable serial programming -> enabled)
#        | +------------------ EESAVE (preserve EEPROM on Chip Erase -> not preserved)
#        +-------------------- DWEN (debug wire enable)
fuses:
	$(AVRDUDE2) -u -U hfuse:w:0xdb:m -U lfuse:w:0xef:m

clean:
	rm -f main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o main.s *.lst
	rm -rf htmldoc latexdoc Readme.txt refman.pdf
	rm -f $(PACKETNAME).tar.gz

# 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
	avr-size main.hex

# doc generation
docs: readme pdf
	@echo "documentation created"

readme: doxygen
	echo "This file is auto-generated from the content of <main.c>." > Readme.txt
	echo "You'll have more fun if you read the HTML-content in htmldoc or the PDF." >> Readme.txt
	echo >> Readme.txt
	lynx -dump htmldoc/main.html >> Readme.txt

pdf: doxygen
	make -C latexdoc
	mv latexdoc/refman.pdf .
	rm -rf latexdoc

doxygen:
	doxygen i2c-dimmer.doxygen

tarball: firmware clean docs
	@echo
	@echo
	@echo "I assume you updated the Changelog...? Press Enter to continue..."
	@read
	mv -v main.hex main_$(TODAY).hex
	[ -e "main_$(TODAY).hex" ] || exit
	rm --force $(PACKETNAME).tar.gz;            \
	tar --directory=..                          \
	    --exclude=CVS                           \
	    --exclude=.git                          \
	    --exclude=*.ps                          \
	    --create                                \
	    --gzip                                  \
	    --verbose                               \
	    --file ../$(PACKETNAME).tar.gz $(DIR)
	rm -f main_$(TODAY).hex