Makefile

# Name: Makefile
# Author: Adam Carmichael <carneeki@carneeki.net>
# Copyright: (C) 2018 Adam Carmichael
# License: MIT

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# This is a prototype Makefile. Modify it according to your needs.
# You should at least check the settings for
# DEVICE ....... The AVR device you compile for
# CLOCK ........ Target AVR clock rate in Hertz
# OBJECTS ...... The object files created from your source files. This list is
#                usually the same as the list of source files with suffix ".o".
# PROGRAMMER ... Options to avrdude which define the hardware you use for
#                uploading to the AVR and the interface where this hardware
#                is connected.
# FUSES ........ Parameters for avrdude to flash the fuses appropriately.

NAME       = opendro
DEVICE     ?= atmega328p
CLOCK      = 16000000
PROGRAMMER ?= -c avrisp2 -P usb
SOURCE    = OpenDRO.ino 
BUILDDIR = build
SOURCEDIR = src
# FUSES      = -U hfuse:w:0xd9:m -U lfuse:w:0x24:m
FUSES      = -U hfuse:w:0xd2:m -U lfuse:w:0xff:m

# Tune the lines below only if you know what you are doing:

AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE) -B 10 -F

# Compile flags for avr-gcc v4.8.1. Does not produce -flto warnings.
# COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -I. -ffunction-sections

# Compile flags for avr-gcc v4.9.2 compatible with the IDE. Or if you don't care about the warnings.
COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -I. -ffunction-sections -flto


OBJECTS = $(addprefix $(BUILDDIR)/,$(notdir $(SOURCE:.c=.o)))

# symbolic targets:
all:	$(NAME).hex

$(BUILDDIR)/%.o: $(SOURCEDIR)/%.c
	$(COMPILE) -MMD -MP -c $< -o $@

.S.o:
	$(COMPILE) -x assembler-with-cpp -c $< -o $(BUILDDIR)/$@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.

#.c.s:
	$(COMPILE) -S $< -o $(BUILDDIR)/$@

flash:	all
	$(AVRDUDE) -U flash:w:$(NAME).hex:i

fuse:
	$(AVRDUDE) $(FUSES)

# Xcode uses the Makefile targets "", "clean" and "install"
install: flash fuse

# if you use a bootloader, change the command below appropriately:
load: all
	bootloadHID $(NAME).hex

clean:
	rm -f $(NAME).hex $(BUILDDIR)/*.o $(BUILDDIR)/*.d $(BUILDDIR)/*.elf

# file targets:
$(BUILDDIR)/main.elf: $(OBJECTS)
	$(COMPILE) -o $(BUILDDIR)/main.elf $(OBJECTS) -lm -Wl,--gc-sections

$(NAME).hex: $(BUILDDIR)/main.elf
	rm -f $(NAME).hex
	avr-objcopy -j .text -j .data -O ihex $(BUILDDIR)/main.elf $(NAME).hex
	avr-size --format=berkeley $(BUILDDIR)/main.elf
# If you have an EEPROM section, you must also create a hex file for the
# EEPROM and add it to the "flash" target.

# Targets for code debugging and analysis:
disasm:	main.elf
	avr-objdump -d $(BUILDDIR)/main.elf

cpp:
	$(COMPILE) -E $(SOURCEDIR)/main.c

# include generated header dependencies
-include $(BUILDDIR)/$(OBJECTS:.o=.d)