MCU_TARGET     = atmega8
F_CPU          = 12000000
FLASHER        = avrdude -c usbasp -p $(MCU_TARGET)

usbasp: fuses
ifeq ($(F_CPU), 12000000)
	$(FLASHER) -B 1 -U flash:w:usbasp.atmega8-12MHz.hex
else ifeq ($(F_CPU), 16000000)
	$(FLASHER) -B 1 -U flash:w:usbasp.atmega8-16MHz.hex
else
	$(error setting of F_CPU is not supported.)
endif

fuses:
	$(FLASHER) -B 200 -U hfuse:w:0xC9:m -U lfuse:w:0xEF:m
shell:
	$(FLASHER) -t