# makefile, written by guido socher
MCU=atmega8
CC=avr-gcc
OBJCOPY=avr-objcopy
# optimize for size:
CFLAGS=-g -mmcu=$(MCU) -Wall -Wstrict-prototypes -Os -mcall-prologues
#-------------------
all: avrm8ledtest.hex
#-------------------
help:
@echo "Usage: make all|load|load_pre|rdfuses|wrfuse1mhz|wrfuse4mhz|wr fuse8mhz|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."
#-------------------
avrm8ledtest.hex : avrm8ledtest.out
$(OBJCOPY) -R .eeprom -O ihex avrm8ledtest.out avrm8ledtest.hex
avrm8ledtest.out : avrm8ledtest.o
$(CC) $(CFLAGS) -o avrm8ledtest.out -Wl,-Map,avrm8ledtest.map avrm8ledtest.o
avrm8ledtest.o : avrm8ledtest.c
$(CC) $(CFLAGS) -Os -c avrm8ledtest.c
# you need to erase first before loading the program.
# load (program) the software into the eeprom:
load: avrm8ledtest.hex
uisp -dlpt=/dev/parport0 --erase -dprog=dapa
uisp -dlpt=/dev/parport0 --upload if=avrm8ledtest.hex -dprog=dapa -v=3 --hash=32
# here is a pre-compiled version in case you have trouble with
# your development environment
load_pre: avrm8ledtest_pre.hex
uisp -dlpt=/dev/parport0 --erase -dprog=dapa
uisp -dlpt=/dev/parport0 --upload if=avrm8ledtest_pre.hex -dprog=dapa -dno-poll -v=3 --hash=32
#-------------------
# 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:
uisp -dlpt=/dev/parport0 -dprog=dapa --rd_fuses
@echo " "
@echo "Explanation: Fuse Low Byte: 0xe1 (1MHz intern), 0xe3 (4MHz intern), 0xe4 (8MHz intern)"
@echo " Fuse High Byte should be 0xd9"
# use internal RC oscillator 1 Mhz
wrfuse1mhz:
uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=0xe1
# use internal RC oscillator 4 Mhz
wrfuse4mhz:
uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=0xe3
# use internal RC oscillator 8 Mhz
wrfuse8mhz:
uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=0xe4
# 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
uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=0xee
#-------------------
clean:
rm -f *.o *.map *.out *t.hex
#-------------------
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