NAME		= boot
TARGET_ARCH	= -mmcu=attiny85
OBJECTS		= $(NAME).o timer0.o receive.o spm.o

CC		= avr-gcc
CFLAGS		= -Os -g -Wall -Wstrict-prototypes -ffreestanding -fshort-enums -Wa,-adhln=$(basename $@).lst
CFLAGS		+= -ffunction-sections
CFLAGS		+= -fno-split-wide-types
LDFLAGS		= -g -Wl,--relax,--gc-sections

PROGRAM_BASE	= 0x0480
CFLAGS		+= -DPROGRAM_BASE=$(PROGRAM_BASE)
LDFLAGS		+= -Wl,--defsym,PROGRAM_BASE=$(PROGRAM_BASE)

attinyhost	= mimas
avrdudecmd	= avrdude -cavrispv2 -P usb -pt85
avrdudecmd	= avrdude -cusbtiny -pt85
avrdude		= ssh -n root@$(attinyhost) $(avrdudecmd)

all:	$(NAME).hex tags

clean:
	rm -f $(OBJECTS) $(OBJECTS:.o=.lst) $(clean)

clean += $(NAME).elf $(NAME).elf.tmp
$(NAME).elf:	$(OBJECTS)
	@rm -f $@
	$(LINK.o) -o $@.tmp $(OBJECTS)
	@size $@.tmp
	@free=`size $@.tmp|awk 'END{ print $(PROGRAM_BASE) - $$1;}'`; \
	echo $$free bytes free; \
	[ $$free -gt 0 ]
	mv $@.tmp $@

clean += $(NAME).hex
$(NAME).hex:	$(NAME).elf
	avr-objcopy -j .text -j .data -O ihex $(NAME).elf $(NAME).hex

disasm:		$(NAME).elf
	avr-objdump -S $(NAME).elf | less

flash:		$(NAME).hex
	scp $(NAME).hex $(attinyhost):/tmp
	$(avrdude) -U flash:w:/tmp/$(NAME).hex

lfuse:
	$(avrdude) -U lfuse:w:0x42:m

hfuse:
	$(avrdude) -U hfuse:w:0xde:m

efuse:
	$(avrdude) -U efuse:w:0xfe:m

include ../common/epilogue.mk