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# makefile, written by guido socher

MCU=atmega64

CC=avr-gcc

OBJCOPY=avr-objcopy

# optimize for size:

CFLAGS=-g -mmcu=$(MCU) -Wall -Wstrict-prototypes -Os -mcall-prologues

#-------------------

all: main.hex

#-------------------

help: 

	@echo "Usage: make all|load|load_pre|rdfuses|wrfuse1mhz|wrfuse4mhz|wrfusecrystal"

	@echo "Warning: you will not be able to undo wrfusecrystal unless you connect an"

	@echo "         external crystal! uC is dead after wrfusecrystal if you do not"

	@echo "         have an external crystal."

#-------------------

main.hex : main.out 

	$(OBJCOPY) -R .eeprom -O ihex main.out main.hex 

main.out : main.o 

	$(CC) $(CFLAGS) -o main.out -Wl,-Map,main.map main.o 

main.o : main.c 

	$(CC) $(CFLAGS) -Os -c main.c

#------------------

load: $(FILE).hex

	./prg_load_uc $(FILE).hex

# here is a pre-compiled version in case you have trouble with

# your development environment

load_pre: $(FILE).hex

	./prg_load_uc $(FILE)_pre.hex

#

loaduisp: $(FILE).hex

	./prg_load_uc -u $(FILE).hex

# here is a pre-compiled version in case you have trouble with

# your development environment

load_preuisp: $(FILE)_pre.hex

	./prg_load_uc -u avrm8ledtest.hex

#-------------------

# fuse byte settings:

#  Atmel AVR ATmega8 

#  Fuse Low Byte      = 0xe1 (1MHz internal), 0xe3 (4MHz internal), 0xe4 (8MHz internal)

#  Fuse High Byte     = 0xd9 

#  Factory default is 0xe1 for low byte and 0xd9 for high byte

# Check this with make rdfuses

rdfuses:

	./prg_fusebit_uc -r

# use internal RC oscillator 1 Mhz

wrfuse1mhz:

	./prg_fusebit_uc -w 1

# use internal RC oscillator 4 Mhz

wrfuse4mhz:

	./prg_fusebit_uc -w 4

# use external 3-8 Mhz crystal

# Warning: you can not reset this to intenal unless you connect a crystal!!

wrfusecrystal:

	@echo "Warning: The external crystal setting can not be changed back without a working crystal"

	@echo "         You have 3 seconds to abort this with crtl-c"

	@sleep 3

	./prg_fusebit_uc -w 0

#-------------------

clean:

	rm -f *.o *.map *.out *.hex

#-------------------