ARDUINO_DIR?="external/ArduinoCore-avr"
NANOPB_DIR?="external/nanopb"

CC=avr-gcc
CXX=avr-g++
OBJCOPY=avr-objcopy
OBJDUMP=avr-objdump
BINSIZE=avr-size
OUT=./bin/
NAME=collar

CFLAGS?=-Datmega328p\
				-Dmega328p\
				-mmcu=atmega328p\
				-Wl,--gc-sections\
				-DF_CPU=16000000L\
				-DARDUINO=200\
				-DARDUINO_AVR_NANO\
				-DARDUINO_ARCH_AVR\
				-Os\
				-ffunction-sections\
				-fdata-sections\
				-MMD\
				-flto\
				-fno-fat-lto-objects\
		  	-fuse-linker-plugin

INC_DIRS?=-I./$(ARDUINO_DIR)/libraries/SPI/src\
					-I./$(ARDUINO_DIR)/cores/arduino\
					-I./$(ARDUINO_DIR)/variants/eightanaloginputs\
					-I./libraries/arduino-LoRa/src\
					-I./libraries/TinyGPSPlus/src\
					-I./$(NANOPB_DIR)\
					-I./protobuf\
					-I./$(ARDUINO_DIR)/libraries/SoftwareSerial/src/

SRC_FILES?=./$(ARDUINO_DIR)/cores/arduino/main.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/wiring_digital.c\
					 ./$(ARDUINO_DIR)/cores/arduino/wiring_analog.c\
					 ./$(ARDUINO_DIR)/cores/arduino/WInterrupts.c\
					 ./$(ARDUINO_DIR)/cores/arduino/hooks.c\
					 ./$(ARDUINO_DIR)/cores/arduino/wiring.c\
           ./$(ARDUINO_DIR)/cores/arduino/HardwareSerial.cpp\
           ./$(ARDUINO_DIR)/cores/arduino/HardwareSerial0.cpp\
           ./$(ARDUINO_DIR)/cores/arduino/HardwareSerial1.cpp\
           ./$(ARDUINO_DIR)/cores/arduino/HardwareSerial2.cpp\
           ./$(ARDUINO_DIR)/cores/arduino/HardwareSerial3.cpp\
					 ./$(ARDUINO_DIR)/libraries/SPI/src/SPI.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/WString.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/Print.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/Stream.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/new.cpp\
					 ./$(ARDUINO_DIR)/cores/arduino/abi.cpp\
					 ./$(ARDUINO_DIR)/libraries/SoftwareSerial/src/SoftwareSerial.cpp\
					 ./libraries/arduino-LoRa/src/LoRa.cpp\
					 ./libraries/TinyGPSPlus/src/TinyGPS++.cpp\
					 ./$(NANOPB_DIR)/pb_encode.c\
					 ./$(NANOPB_DIR)/pb_decode.c\
					 ./$(NANOPB_DIR)/pb_common.c\
					 ./gateway/message.pb.c

build: $(OUT)$(NAME).hex

$(OUT)$(NAME).hex: $(OUT)$(NAME).elf
	$(OBJCOPY) -R .eeprom -O ihex $(OUT)$(NAME).elf $(OUT)$(NAME).hex
$(OUT)eep.hex: $(OUT)$(NAME).elf
	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $(OUT)$(NAME).elf $(OUT)eep.hex
$(OUT)$(NAME).elf: protobuf bin
	$(CC) $(CFLAGS) -o $(OUT)$(NAME).elf collar.cpp $(INC_DIRS) $(SRC_FILES) 

protobuf:
	mkdir -p protobuf/gateway
	python external/nanopb/generator/nanopb_generator.py gateway/message.proto -D protobuf

bin: 
	mkdir bin

flash:
	avrdude -v -patmega328p -carduino -P/dev/ttyUSB0 -b115200 -D -Uflash:w:$(OUT)$(NAME).hex:i
clean:
	rm -r protobuf
	rm -r bin