#DEFINES += 
CFLAGS += -Wall -Os  -I. -mmcu=atmega88

# further optimization:
#CFLAGS += --param inline-call-cost=2 
CFLAGS += -fno-move-loop-invariants  # suggestions from from v-usb
CFLAGS += -fno-tree-scev-cprop  
CFLAGS += -fno-inline-small-functions 

COMPILE = avr-gcc $(CFLAGS) $(DEFINES)

# symbolic targets:
all:	firmware.hex

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

.S.o:
	$(COMPILE) -x assembler-with-cpp -c $< -o $@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.

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

flash:	all
	avrdude -c usbasp -p m88 -U flash:w:firmware.hex

fuses:
	avrdude -c usbasp -p m88 -U lfuse:w:0xdf:m -U hfuse:w:0xde:m # external oscillator


## what are the source dependencies
%.d: %.c
	@set -e; rm -f $@;  \
	$(COMPILE) -MM $< | sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' > $@; 
# line 1: exits if anything goes wrong
# line 2a: gcc -MM outputs dependencies
# line 2b: insert the %.d into dependency list

#main.c:	version.h


clean:
	rm -f *.o *.hex *.obj *.i *.s *.d */*.i */*.s */*.o */*.d version.h

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

firmware.hex:	firmware.bin
	rm -f firmware.hex firmware.eep.hex
	avr-objcopy -j .text -j .data -O ihex firmware.bin firmware.hex
	avr-size firmware.bin
#	./checksize firmware.bin 8192 960
# do the checksize script as our last action to allow successful compilation
# on Windows with WinAVR where the Unix commands will fail.

disasm:	firmware.bin
	avr-objdump -d firmware.bin >disasm

functionsize: disasm
	python avrbuild/functionsize.py 

countregs: disasm
	python avrbuild/countregs.py 

# for depends:
-include $(OBJECTS:.o=.d)