PRG            = main
OBJ            = main.o

#MCU_TARGET     = atmega8
MCU_TARGET     = atmega48
#MCU_TARGET     = atmega88
#MCU_TARGET     = atmega168

OPTIMIZE       = -O2

DEFS           =
LIBS           =

# You should not have to change anything below here.

CC             = avr-gcc
AS             = avr-as

# Override is only needed by avr-lib build system.

override CFLAGS        = -g -std=c99 -Wall -pedantic -Wshadow -Winline \
						-Werror $(OPTIMIZE) -mmcu=$(MCU_TARGET) $(DEFS)
override ASFLAGS       = -I/usr/local/avr/avr/asminc -mmcu=$(MCU_TARGET)
override LDFLAGS       = -Wl,-Map,$(PRG).map

OBJCOPY        = avr-objcopy
OBJDUMP        = avr-objdump

all: $(PRG).elf lst text eeprom
	(echo 'ibase=16';egrep '^S1' ${PRG}.srec | sed 's/^S1\(..\)\(....\).*$$/\2 + \1 - 3/' | sort | tail -n 1) | bc

$(PRG).elf: $(OBJ)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)

.c.s:	$<
	$(CC) $(CFLAGS) -S $<


clean:
	rm -rf *.o $(PRG).elf *.eps *.png *.pdf *.bak 
	rm -rf *.lst *.map $(EXTRA_CLEAN_FILES)

lst:  $(PRG).lst

%.lst: %.elf
	$(OBJDUMP) -h -S $< > $@
	$(OBJDUMP) -t -j .bss $< | egrep -v '$<: *file format elf32-avr' >> $@
	$(OBJDUMP) -s -j .comment $< | egrep -v '$<: *file format elf32-avr' >> $@
	sed -i 's/ \({{{\|}}}\) / /' $@

# Rules for building the .text rom images

text: hex bin srec

hex:  $(PRG).hex
bin:  $(PRG).bin
srec: $(PRG).srec

%.hex: %.elf
	$(OBJCOPY) -j .text -j .data -O ihex $< $@

%.srec: %.elf
	$(OBJCOPY) -j .text -j .data -O srec $< $@

%.bin: %.elf
	$(OBJCOPY) -j .text -j .data -O binary $< $@

# Rules for building the .eeprom rom images

eeprom: ehex ebin esrec

ehex:  $(PRG)_eeprom.hex
ebin:  $(PRG)_eeprom.bin
esrec: $(PRG)_eeprom.srec

%_eeprom.hex: %.elf
	@$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@ \
	|| { echo empty $@ not generated; exit 0; }

%_eeprom.srec: %.elf
	@$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $< $@ \
	|| { echo empty $@ not generated; exit 0; }

%_eeprom.bin: %.elf
	@$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $< $@ \
	|| { echo empty $@ not generated; exit 0; }

# Every thing below here is used by avr-libc's build system and can be ignored
# by the casual user.

FIG2DEV                 = fig2dev
EXTRA_CLEAN_FILES       = *.hex *.bin *.srec

dox: eps png pdf

eps: $(PRG).eps
png: $(PRG).png
pdf: $(PRG).pdf

%.eps: %.fig
	$(FIG2DEV) -L eps $< $@

%.pdf: %.fig
	$(FIG2DEV) -L pdf $< $@

%.png: %.fig
	$(FIG2DEV) -L png $< $@