Makefile

## 
# Makefile for Arduino feauturing the ATmega328P microcontroller.
#
# Notes for Makefile Noobs:
#
#	All makefile rules are structured like this:
# 		target:	prerequisites
#		<TAB> 	recipe
#
#	$@ means target
#	$^ means all prerequesites
#
##


# specify compiler
CC = avr-gcc

# specify programmer
PROGRAMMER = arduino

# overriding baudrate
BAUDRATE = 57600		# Arduino Nano
# BAUDRATE = 115200		# Arduino Uno

# specify mcu
MCU_MODEL = ATmega328P

# specify compiler flags
CFLAGS ?= -Os -DF_APU=16000000UL -mmcu=atmega328p -Wall -Wextra -Werror -std=c99

# specify linker flags
LDFLAGS ?= -mmcu=atmega328p

# specify USB path to Arduino
#ARDUINO_USB ?= /dev/ttyACM0
ARDUINO_USB ?= /dev/ttyUSB0


all: main.hex ioexample.run

main.hex: main.run
	@echo "generating hexfile .."
	avr-objcopy -O ihex -R .eeprom main.run main.hex

main.run: main.o hal/pin.o hal/serial.o
	@echo "linking compiled files to main.run .."
	$(CC) $(LDFLAGS) -o $@ $^

main.o: main.c
	@echo "compiling main.c .."
	$(CC) $(CFLAGS) -c -o $@ $<

hal/pin.o: hal/pin.c hal/pin.h
	@echo "compiling pin.c .."
	$(CC) $(CFLAGS) -c -o $@ $<

hal/serial.o: hal/serial.c hal/serial.h
	@echo "compiling serial.c .."
	$(CC) $(CFLAGS) -c -o $@ $<

upload: main.hex
	@echo "flashing hex file to microcontroller .."
	avrdude -F -V -c ${PROGRAMMER} -p ${MCU_MODEL} -P ${ARDUINO_USB} -b ${BAUDRATE} -U flash:w:main.hex  

ioexample.run: linuxSerialClient/ioexample.cpp
	@echo "compiling linux serial client as 'ioexample' .."
	g++ -std=c++17 -Wall -Wextra  linuxSerialClient/ioexample.cpp -o ioexample.run  

clean:
	@echo "cleaning up .."
	rm -rf *.o **/*.o *.run **/*.run *.hex **/*.hex

# specify all targets that are not files
.PHONY: clean upload all