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# Part of Grbl
# Copyright (c) 2009-2011 Simen Svale Skogsrud
# Grbl is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# Grbl is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with Grbl. If not, see <>.
# This is a prototype Makefile. Modify it according to your needs.
# You should at least check the settings for
# DEVICE ....... The AVR device you compile for
# CLOCK ........ Target AVR clock rate in Hertz
# OBJECTS ...... The object files created from your source files. This list is
# usually the same as the list of source files with suffix ".o".
# PROGRAMMER ... Options to avrdude which define the hardware you use for
# uploading to the AVR and the interface where this hardware
# is connected.
# FUSES ........ Parameters for avrdude to flash the fuses appropriately.
DEVICE = atmega328p
CLOCK = 16000000
PROGRAMMER = -c avrisp2 -P usb
OBJECTS = main.o motion_control.o gcode.o spindle_control.o serial.o protocol.o stepper.o \
eeprom.o settings.o planner.o nuts_bolts.o limits.o print.o
# FUSES = -U hfuse:w:0xd9:m -U lfuse:w:0x24:m
FUSES = -U hfuse:w:0xd2:m -U lfuse:w:0xff:m
# update that line with this when programmer is back up:
# FUSES = -U hfuse:w:0xd7:m -U lfuse:w:0xff:m
# Tune the lines below only if you know what you are doing:
AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE) -B 10 -F
COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -I. -ffunction-sections
# symbolic targets:
all: grbl.hex
$(COMPILE) -c $< -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.
$(COMPILE) -S $< -o $@
flash: all
$(AVRDUDE) -U flash:w:grbl.hex:i
# Xcode uses the Makefile targets "", "clean" and "install"
install: flash fuse
# if you use a bootloader, change the command below appropriately:
load: all
bootloadHID grbl.hex
rm -f grbl.hex main.elf $(OBJECTS)
# file targets:
main.elf: $(OBJECTS)
$(COMPILE) -o main.elf $(OBJECTS) -lm -Wl,--gc-sections
grbl.hex: main.elf
rm -f grbl.hex
avr-objcopy -j .text -j .data -O ihex main.elf grbl.hex
avr-objdump -h main.elf | grep .bss | ruby -e 'puts "\n\n--- Requires %s bytes of SRAM" %[0-9a-f]+\s/)[0].to_i(16)'
avr-size *.hex *.elf *.o
# If you have an EEPROM section, you must also create a hex file for the
# EEPROM and add it to the "flash" target.
# Targets for code debugging and analysis:
disasm: main.elf
avr-objdump -d main.elf
$(COMPILE) -E main.c