############################################################################### # # Simple Makefile for Arduino MEGA 2560 C projects # ############################################################################### CC = avr-gcc OBJCOPY = avr-objcopy AVRDUDE = avrdude CODE_FORMATTER = tooling/format-code.sh BOARD = atmega2560 # Use shell command export to define it # Example: export ARDUINO=/dev/ttyACM0 DEVICE = $(ARDUINO) # Build artifacts BINDIR = bin TARGET = $(BINDIR)/$(BOARD)-user-code.ihx ELF = $(BINDIR)/$(BOARD)-user-code.elf # Source files. wildard "uses" all .c files in src directory SRCDIR = src SRC = $(wildcard $(SRCDIR)/*.c) # Define object files from .c files defined above OBJ=$(SRC:.c=.o) # Compiler flags # Note that those beginning with -D are acctually pre-processor macros # -Wall ... -Wfatal-errors All possible warning options # -Os Optimize code. The special option -Os is meant to turn on all -O2 # optimizations that are not expected to increase code size. # -std=c11 use C11 standard CFLAGS = -Wall \ -Wextra \ -Wpedantic \ -Wformat \ -pedantic-errors \ -Werror \ -Wfatal-errors \ -Os \ -mmcu=$(BOARD) \ -DF_CPU=16000000UL \ -DGIT_SHA=\"$(shell git describe --abbrev=6 --dirty --always --tags)\" \ -std=c11 # Linker flags LDFLAGS = -mmcu=$(BOARD) OBJCOPYARGS = -O ihex \ -R .eeprom # FIXME Find out why some Arduinos require -D to write code AVRDUDEARGS = -p $(BOARD) \ -c wiring \ -F \ -P $(DEVICE) \ -b 115200 \ -V \ -D all: $(ELF) $(TARGET) %.o : %.c $(CC) -c $(CFLAGS) -o $*.o $< $(ELF): $(OBJ) $(CC) $(LDFLAGS) $^ -o $@ $(TARGET): $(OBJCOPY) $(OBJCOPYARGS) $(ELF) $(TARGET) clean: #Do not remove .placeholder in BINDIR find $(BINDIR) -type f -not -name '.placeholder' -print0 | xargs -0 rm -f -- rm -f $(SRCDIR)/*.o install: $(AVRDUDE) $(AVRDUDEARGS) -U flash:w:$(TARGET) format: $(CODE_FORMATTER) $(SRC) .PHONY: clean install format