SERIAL = `echo /dev/tty.USA19QI*`
UISP = uisp -dprog=avr910 -dserial=$(SERIAL) -dpart=auto
TARGET = atmega8
#TARGET = at90s2313
# The two lines above are for "uisp" and the AVR910 serial programmer connected
# to a Keyspan USB to serial converter to a Mac running Mac OS X.
# Choose your favorite programmer and interface.

COMPILE = avr-gcc -Wall -O2 -Iusbdrv -I. -mmcu=$(TARGET) # -DDEBUG_LEVEL=2

OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o isp.o clock.o main.o


# symbolic targets:
all:	main.hex

.c.o:
	$(COMPILE) -c $< -o $@
#-Wa,-ahlms=$<.lst

.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 $@

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

# file targets:
main.bin:	$(OBJECTS)
	$(COMPILE) -o main.bin $(OBJECTS) -Wl,-Map,main.map

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

disasm:	main.bin
	avr-objdump -d main.bin

cpp:
	$(COMPILE) -E main.c

avrdude:
	avrdude -c butterfly -p $(TARGET) -U flash:w:main.hex

fuses:
	avrdude -c avr910 -p m8 -u -U hfuse:w:0xc9:m -U lfuse:w:0x9f:m

# Fuse high byte:
# 0xc9 = 1 1 0 0   1 0 0 1 <-- BOOTRST (boot reset vector at 0x0000)
#        ^ ^ ^ ^   ^ ^ ^------ BOOTSZ0
#        | | | |   | +-------- BOOTSZ1
#        | | | |   + --------- EESAVE (don't preserve EEPROM over chip erase)
#        | | | +-------------- CKOPT (full output swing)
#        | | +---------------- SPIEN (allow serial programming)
#        | +------------------ WDTON (WDT not always on)
#        +-------------------- RSTDISBL (reset pin is enabled)
# Fuse low byte:
# 0x9f = 1 0 0 1   1 1 1 1
#        ^ ^ \ /   \--+--/
#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
#        | +------------------ BODEN (BrownOut Detector enabled)
#        +-------------------- BODLEVEL (2.7V)


uisp:	all
	$(UISP) --erase
	$(UISP) --upload --verify if=main.hex