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##
## Makefile to create firmware image including arduino sources
##
##
# Arduino variant
#
VARIANT=mega
# CPU model
#
MCU=atmega2560
# CPU Frequency
#
F_CPU=16000000L
# Serial port used for uploading and monitoring
#
SERIAL=/dev/ttyACM0
BAUD=115200
# Name of image to produce (can be arbitrary)
#
TARGET=firmware
# Toolchain and flags
#
CC=avr-gcc
CFLAGS=-Os -Wall -ffunction-sections -fdata-sections -mmcu=$(MCU) -DF_CPU=$(F_CPU) -MMD -DUSB_VID=0x2341 -DUSB_PID=0x8037 -DARDUINO=106
CXX=avr-g++
CXXFLAGS=$(CFLAGS)
LD=avr-gcc
LDFLAGS= -Os -Wl,--gc-sections -mmcu=$(MCU)
AR=avr-ar
AS=avr-as
ASFLAGS=-mmcu=$(MCU)
OC=avr-objcopy
OCFLAGS=
OD=avr-objdump
AVRDUDE=avrdude
AVRDUDEFLAGS= -DV -p $(MCU) -P $(SERIAL) -c stk500v2 -b 115200
AVRSIZE=avr-size
# Derived variables
SOURCEDIRS=\
src \
ext/arduino/core \
$(wildcard ext/arduino/lib/*)
INCLUDES=\
include \
ext/arduino/core \
ext/arduino/variants/$(VARIANT) \
$(wildcard ext/arduino/lib/*)
SOURCES=\
$(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.c)) \
$(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.cpp))
OBJECTS=$(addsuffix .o, $(basename $(SOURCES)))
# Rules
all: $(TARGET).hex
$(TARGET).hex: $(TARGET).elf
$(OC) $(OCFLAGS) -O ihex -R .eeprom $< $@
$(TARGET).elf: $(OBJECTS)
$(LD) $(LDFLAGS) -o $@ $^
# Sources
%.o: %.c
$(CC) $(CFLAGS) -I$(dir $<) $(addprefix -I, $(INCLUDES)) -o $@ -c $<
%.o: %.cpp
$(CXX) $(CXXFLAGS) -I$(dir $<) $(addprefix -I, $(INCLUDES)) -o $@ -c $<
# Utility rules
size: $(TARGET).hex
$(AVRSIZE) --format=avr --mcu=$(MCU) $(TARGET).elf
upload: $(TARGET).hex
$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(TARGET).hex:i
monitor:
cu -l $(SERIAL) -s $(BAUD) --parity=none -h
clean:
@rm -f *.o
@for dir in $(SOURCEDIRS); do \
rm -f $$dir/*.o; \
rm -f $$dir/*.d; \
done
@rm -f $(TARGET).hex
@rm -f $(TARGET).elf
@rm -f $(GDBINITFILE)
.PHONY: clean
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