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Makefile
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Makefile
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# simple AVR Makefile
#
# written by michael cousins (http://github.com/mcous)
# released to the public domain
# Makefile
#
# targets:
# all: compiles the source code
# test: tests the isp connection to the mcu
# flash: writes compiled hex file to the mcu's flash memory
# fuse: writes the fuse bytes to the MCU
# disasm: disassembles the code for debugging
# clean: removes all .hex, .elf, and .o files in the source code and library directories
# parameters (change this stuff accordingly)
# project name
PRJ = main
# avr mcu
MCU = atmega328p
# mcu clock frequency
CLK = 8000000
# avr programmer (and port if necessary)
# e.g. PRG = usbtiny -or- PRG = arduino -P /dev/tty.usbmodem411
PRG = usbtiny
# fuse values for avr: low, high, and extended
# these values are from an Arduino Uno (ATMega328P)
# see http://www.engbedded.com/fusecalc/ for other MCUs and options
LFU = 0xFF
HFU = 0xDE
EFU = 0x05
# program source files (not including external libraries)
SRC = $(PRJ).cpp
# where to look for external libraries (consisting of .c/.cpp files and .h files)
# e.g. EXT = ../../EyeToSee ../../YouSART
EXT =
#################################################################################################
# \/ stuff nobody needs to worry about until such time that worrying about it is appropriate \/ #
#################################################################################################
# include path
INCLUDE := $(foreach dir, $(EXT), -I$(dir))
# c flags
CFLAGS = -Wall -Os -DF_CPU=$(CLK) -mmcu=$(MCU) $(INCLUDE)
# any aditional flags for c++
CPPFLAGS =
# executables
AVRDUDE = avrdude -c $(PRG) -p $(MCU)
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size --format=avr --mcu=$(MCU)
CC = avr-gcc
# generate list of objects
CFILES = $(filter %.c, $(SRC))
EXTC := $(foreach dir, $(EXT), $(wildcard $(dir)/*.c))
CPPFILES = $(filter %.cpp, $(SRC))
EXTCPP := $(foreach dir, $(EXT), $(wildcard $(dir)/*.cpp))
OBJ = $(CFILES:.c=.o) $(EXTC:.c=.o) $(CPPFILES:.cpp=.o) $(EXTCPP:.cpp=.o)
# user targets
# compile all files
all: $(PRJ).hex
# test programmer connectivity
test:
$(AVRDUDE) -v
# flash program to mcu
flash: all
$(AVRDUDE) -U flash:w:$(PRJ).hex:i
# write fuses to mcu
fuse:
$(AVRDUDE) -U lfuse:w:$(LFU):m -U hfuse:w:$(HFU):m -U efuse:w:$(EFU):m
# generate disassembly files for debugging
disasm: $(PRJ).elf
$(OBJDUMP) -d $(PRJ).elf
# remove compiled files
clean:
rm -f *.hex *.elf *.o
$(foreach dir, $(EXT), rm -f $(dir)/*.o;)
# other targets
# objects from c files
.c.o:
$(CC) $(CFLAGS) -c $< -o $@
# objects from c++ files
.cpp.o:
$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
# elf file
$(PRJ).elf: $(OBJ)
$(CC) $(CFLAGS) -o $(PRJ).elf $(OBJ)
# hex file
$(PRJ).hex: $(PRJ).elf
rm -f $(PRJ).hex
$(OBJCOPY) -j .text -j .data -O ihex $(PRJ).elf $(PRJ).hex
$(SIZE) $(PRJ).elf