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