# Generic AVR Makefile

# Brian Mayton <bmayton@media.mit.edu>

#

# This is a basic Makefile for building programs for the AVR.  I usually start

# with this for any new project; it's pretty versatile.

#

# 'make' builds the .hex file.

# 'make install' uses the programmer to load it onto the target chip.

# 'make fuses' programs the fuse bits on the target chip.

# 'make clean' removes all autogenerated files.

# OBJECTS should list all of the object files for the program (e.g. for each

# .c file, list a corresponding .o file here.)  APPLICATION just specifies the

# name of the hex/elf files, and can be whatever you want. 

OBJECTS = \

	analog_exp.o \

	uart.o \

	debug.o \

	onewire.o \

	onewire_hal_bitbang.o \

	excitation.o \

APPLICATION = analog_exp

# Set up which MCU you're using, and what programmer, and the clock speed

# here.

MCU = atmega168p

PROGRAMMER = jtag2isp

F_CPU = 8000000UL

# Make sure you check these fuse settings before actually using them, using

# fuse settings for the wrong clock setup or chip can make it hard to

# reprogram.  http://www.engbedded.com/fusecalc/ is very useful!

EFUSE=0x01

HFUSE=0xD7

LFUSE=0xE2

# Edit these if you want to use different compilers

CC = avr-gcc

OBJCOPY = avr-objcopy

SIZE = avr-size

AVRDUDE = avrdude

# Compiler and linker flags

CFLAGS=-mmcu=$(MCU) -Wall -DF_CPU=$(F_CPU) -I. -funsigned-char \

	-funsigned-bitfields -fpack-struct -fshort-enums -Os -DDEBUG --std=gnu99

LDFLAGS=-mmcu=$(MCU)

all: $(APPLICATION).hex

clean:

	rm -f *.hex *.elf *.o 

%.hex: %.elf

	$(OBJCOPY) -j .text -j .data -O ihex $< $@

$(APPLICATION).elf: $(OBJECTS)

	$(CC) $(LDFLAGS) -o $@ $^

	$(SIZE) -C --mcu=$(MCU) $@

%.o: %.c

	$(CC) $(CFLAGS) -c $< -o $@

install: all

	$(AVRDUDE) -p $(MCU) -c $(PROGRAMMER) -P usb -e \

		-U flash:w:$(APPLICATION).hex

fuses:

	$(AVRDUDE) -p $(MCU) -c $(PROGRAMMER) -P usb -e \

		-U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m \

		-U efuse:w:$(EFUSE):m

.PHONY: all clean install fuses