target = blink
obj = \
	$(target).o \
	lcd.o \
	serial.o

avrhome = /opt/avr
serport = /dev/ttyUSB0
serrate = 57600
mcu = atmega328p

CFLAGS = \
	-DF_CPU=16000000 \
	-I$(avrhome)/include \
	 -Wall -Wstrict-prototypes \
	-mmcu=$(mcu) \
	-gstabs -save-temps \
	-Os \
	-std=gnu99 \
	-Wall
LDFLAGS = \
	-L$(avrhome)/lib/avr4

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

all: $(target).hex

.SUFFIXES: .c .o .elf .hex

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

$(target).elf: $(obj)
	$(CC) $(CFLAGS) $(obj) -o $@ $(LDFLAGS)
	$(SIZE) $@

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

upload: $(target).hex
	$(AVRDUDE) \
		-F -p $(mcu) -P $(serport) -c stk500 -b $(serrate) \
		-U flash:w:$(target).hex

clean:
	rm -f $(obj) $(target).hex $(target).elf