DEVICE     = attiny2313
CLOCK      = 8000000
FUSES      = -U lfuse:w:0xe4:m -U hfuse:w:0xd9:m

PROGRAMMER  =-c stk500v2
PROGRAMMER +=-P /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A800dAli-if00-port0
# in ms should be at least 4 times less than clock speed
SPEED      = 4 # for default 1Mhz clock
#SPEED      = 0.34 # for 12Mhz clock
DEFS    = -DF_CPU=$(CLOCK)UL
LIBS    = -Wl,--relax,--gc-sections,--print-gc-sections,--entry=main
LIBS = -Wl,--entry=main,--gc-sections,--rela
CFLAGS  = -Wall -Werror -pedantic -std=c99
CFLAGS += -Os -funsigned-bitfields -fpack-struct -fshort-enums
CFLAGS += -mmcu=$(DEVICE) $(DEFS)
#LDFLAGS = $(LIBS)

all: main.hex size

main.hex: main.c
	avr-gcc -o main.elf $? $(CFLAGS) $(LDFLAGS)
	avr-objcopy -j .text -j .data -O ihex main.elf main.hex

f: flash
flash: all
	avrdude $(PROGRAMMER) -p $(DEVICE) -B $(SPEED) -U flash:w:main.hex:i

fuse:
	avrdude $(PROGRAMMER) -p $(DEVICE) -B $(SPEED) $(FUSES)

clean:
	rm -f *.o *.elf *.hex

size:
	avr-size --mcu=$(DEVICE) -t -A main.elf
	avr-size --mcu=$(DEVICE) -C main.elf
	avr-nm --size-sort main.elf