# Wzorcowy makefile
DEVICE = atmega88

# jak wywołać programator
AVRDUDE = avrdude -c bascom -P lpt1 -p $(DEVICE)

# opcje kompilacji
COMPILE = avr-gcc -Wall -Os -I. -mmcu=$(DEVICE) -DF_CPU=12000000

OBJECTS = main.o

# symbolic targets:
all:	main.hex

.c.o:
	$(COMPILE) -c $< -o $@

.S.o:
	$(COMPILE) -x assembler-with-cpp -c $< -o $@

.c.s:
	$(COMPILE) -S $< -o $@

# programowanie procesora
flash:	all
	$(AVRDUDE) -U flash:w:main.hex:i
	
# odczyt fusebitów
fuse_rd:
	$(AVRDUDE) -D -U lfuse:r:lf:b -U hfuse:r:hf:b 
	cat lf
	cat hf

# Fuse low byte:
# 0xef = 1 1 1 0   1 1 1 1
#        ^ ^ \+/   \--+--/
#        | |  |       +------- CKSEL 3..0 (clock selection -> crystal @ 12 MHz)
#        | |  +--------------- SUT 1..0 (BOD enabled, fast rising power)
#        | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
#        +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
#
# Fuse high byte:
# 0xdb = 1 1 0 1   1 0 1 1
#        ^ ^ ^ ^   \-+-/ ^
#        | | | |     |   +---- RSTDISBL (disable external reset -> enabled)
#        | | | |     +-------- BODLEVEL 2..0 (brownout trigger level -> 2.7V)
#        | | | +-------------- WDTON (watchdog timer always on -> disable)
#        | | +---------------- SPIEN (enable serial programming -> enabled)
#        | +------------------ EESAVE (preserve EEPROM on Chip Erase -> not preserved)
#        +-------------------- DWEN (debug wire enable)
fuse_wr:
	$(AVRDUDE) -D -U lfuse:w:0b10111111:m -U hfuse:w:0xdd:m


clean:
	rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o

# file targets:
main.bin:	$(OBJECTS)
	$(COMPILE) -o main.bin $(OBJECTS)

main.hex:	main.bin
	rm -f main.hex main.eep.hex
	avr-objcopy -j .text -j .data -O ihex main.bin main.hex

disasm:	main.bin
	avr-objdump -d main.bin
	
cpp:
	$(COMPILE) -E main.c