MCU_TARGET     = atmega328p
F_CPU          = 16000000
FLASHER        = avrdude -c usbasp -p $(MCU_TARGET)

usbasp: fuses
ifeq ($(F_CPU), 12000000)
	$(FLASHER) -B 1 -U flash:w:usbasp.atmega328-12MHz.2011-05-28.hex
else ifeq ($(F_CPU), 16000000)
	$(FLASHER) -B 1 -U flash:w:usbasp.atmega328-16MHz.2011-05-28.hex
else
	$(error setting of F_CPU is not supported.)
endif

fuses:
	$(FLASHER) -B 300 -U lfuse:w:0xef:m -U hfuse:w:0xd9:m -U efuse:w:0x05:m
shell:
	$(FLASHER) -B 200 -t