# Makefile for ATmegaBOOT
# E.Lins, 18.7.2005

# Instructions
#
# To build the bootloader for the LilyPad:
# make lily


# program name should not be changed...
PROGRAM    = ATmegaBOOT_168

# enter the target CPU frequency
AVR_FREQ   = 8000000L

# enter the parameters for the avrdude isp tool
ISPTOOL	   = stk500v2
ISPPORT	   = usb
ISPSPEED   = -b 115200

MCU_TARGET = atmega168
LDSECTION  = --section-start=.text=0x3800

# the efuse should really be 0xf8; since, however, only the lower
# three bits of that byte are used on the atmega168, avrdude gets
# confused if you specify 1's for the higher bits, see:
# http://tinker.it/now/2007/02/24/the-tale-of-avrdude-atmega168-and-extended-bits-fuses/
#
# similarly, the lock bits should be 0xff instead of 0x3f (to
# unlock the bootloader section) and 0xcf instead of 0x0f (to
# lock it), but since the high two bits of the lock byte are
# unused, avrdude would get confused.
ISPFUSES    = avrdude -c $(ISPTOOL) -p m168 -P $(ISPPORT) $(ISPSPEED) -e -u -U lock:w:0x3f:m -U efuse:w:0x00:m -U hfuse:w:0xdd:m -U lfuse:w:0xff:m
ISPFLASH    = avrdude -c $(ISPTOOL) -p m168 -P $(ISPPORT) $(ISPSPEED) -U flash:w:$(PROGRAM)_$(TARGET).hex -U lock:w:0x0f:m


OBJ        = $(PROGRAM).o
OPTIMIZE   = -O2

DEFS       = 
LIBS       =

CC         = avr-gcc


# Override is only needed by avr-lib build system.

override CFLAGS        = -g -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET) -DF_CPU=$(AVR_FREQ) $(DEFS)
override LDFLAGS       = -Wl,$(LDSECTION)
#override LDFLAGS       = -Wl,-Map,$(PROGRAM).map,$(LDSECTION)

OBJCOPY        = avr-objcopy
OBJDUMP        = avr-objdump

all:

lily: CFLAGS += '-DMAX_TIME_COUNT=F_CPU>>1' '-DNUM_LED_FLASHES=3'
lily: $(PROGRAM).hex

$(PROGRAM).hex: $(PROGRAM).elf
	$(OBJCOPY) -j .text -j .data -O ihex $< $@
	
$(PROGRAM).elf: $(OBJ)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
	
$(OBJ): 
	avr-gcc $(CFLAGS) $(LDFLAGS) -c -g -O2 -Wall -mmcu=atmega168 ATmegaBOOT.c -o ATmegaBOOT_168.o

%.lst: %.elf
	$(OBJDUMP) -h -S $< > $@

%.srec: %.elf
	$(OBJCOPY) -j .text -j .data -O srec $< $@

%.bin: %.elf
	$(OBJCOPY) -j .text -j .data -O binary $< $@

clean:
	rm -rf *.o *.elf *.lst *.map *.sym *.lss *.eep *.srec *.bin *.hex
	
install:
	avrdude -p m168 -c stk500v2 -P /dev/cu.USA19H1b1P1.1 -e -u -U lock:w:0x3f:m -U efuse:w:0x00:m -U hfuse:w:0xdd:m -U lfuse:w:0xe2:m 
	avrdude -p m168 -c stk500v2 -P /dev/cu.USA19H1b1P1.1 -e -u -U flash:w:ATmegaBOOT_168.hex  -U lock:w:0x0f:m
