DEFS = -DF_CPU=16000000l

OBJ = main.o

# Default values

OUT ?= image

MCU_TARGET ?= atmega8

MCU_CC ?= avr-gcc

OPTIMIZE ?= -Os

WARNINGS ?= -Wall

CFLAGS += -mmcu=$(MCU_TARGET) $(OPTIMIZE) $(WARNINGS) $(DEFS)

LDFLAGS = -Wl,-Map,$(OUT).map

CANADDR ?= XXX

# External Tools

OBJCOPY ?= avr-objcopy

OBJDUMP ?= avr-objdump

FLASHCMD ?= avrdude -c bsd -p m16 -U flash:w:$(OUT).hex

LAPFLASHCMD ?= lapcontrol -s rl

LAUNCH_BOOTLOADER = launch-bootloader

SERIAL = /dev/ttyUSB0

BAUDRATE = 115200

#############################################################################

# Rules

all: $(OUT).elf lst text

clean:

rm -rf $(OUT) *.o *.lst *.map *.hex *.bin *.srec

rm -rf *.srec $(OUT).elf

flash: $(OUT).hex

$(ERASECMD)

$(FLASHCMD)

canflash: $(OUT).hex

$(LAPFLASHCMD) flash $(CANADDR) $(OUT).hex

sflash: $(OUT).hex

$(LAUNCH_BOOTLOADER) $(SERIAL) $(BAUDRATE)

avrdude -p m16 -b $(BAUDRATE) -u -c avr109 -P $(SERIAL) -U f:w:$(OUT).hex -F

echo X > $(SERIAL)

#############################################################################

# Building Rules

$(OUT).elf: $(OBJ)

$(MCU_CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)

%.o: %.c

$(MCU_CC) $(CFLAGS) -c $<

lst: $(OUT).lst

%.lst: %.elf

$(OBJDUMP) -h -S $< > $@

# Rules for building the .text rom images

text: hex bin srec

hex: $(OUT).hex

bin: $(OUT).bin

srec: $(OUT).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 $< $@

%.o: %.S

avr-gcc -c $(CFLAGS) -o $@ $<

# Rules for building the .eeprom rom images

eeprom: ehex ebin esrec

ehex: $(OUT)_eeprom.hex

ebin: $(OUT)_eeprom.bin

esrec: $(OUT)_eeprom.srec

%_eeprom.hex: %.elf

$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@

%_eeprom.srec: %.elf

$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $< $@

%_eeprom.bin: %.elf

$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $< $@