PROGRAM=lights
SRC=lights.c
OBJ=$(SRC:.c=.o)

MCU=attiny861a
# AVRDUDE_MCU=$(MCU)
AVRDUDE_MCU=attiny861
AVRDUDE_PROGRAMMER=usbasp

CFLAGS=-Os -mmcu=$(MCU)
LDFLAGS=
AVRDUDE_FLAGS= -p$(AVRDUDE_MCU) -c $(AVRDUDE_PROGRAMMER)

FORMAT=ihex

CC=avr-gcc
OBJCOPY=avr-objcopy
AVRDUDE=avrdude

all: $(PROGRAM).hex $(PROGRAM).eep

program: $(PROGRAM).hex $(PROGRAM).eep
	$(AVRDUDE) $(AVRDUDE_FLAGS) -U flash:w:$(PROGRAM).hex:i -U eeprom:w:$(PROGRAM).eep:i

.PRECIOUS : $(OBJ) $(PROGRAM).elf

%.hex: %.elf
	$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@

%.eep: %.elf
	$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
		--change-section-lma .eeprom=0 -O $(FORMAT) $< $@

%.elf: $(OBJ)
	$(CC) $(CFLAGS) $(OBJ) -o $@ $(LDFLAGS)

%.o: %.c
	$(CC) -c $(CFLAGS) $< -o $@

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

%.o: %.S
	$(CC) -c $(CFLAGS) $< -o $@

clean:
	rm -f $(PROGRAM).hex $(PROGRAM).eep $(PROGRAM).elf *.o *.s

.PHONY: all clean