HappyCodingRobot/Makefile

## arduino.mk
#_______________________________________________________________________________
#
#                         (modified) Arduino makefile
#_______________________________________________________________________________
#                                                                version jan_0.6
#
# Copyright (C) 2011, 2012, 2013 Tim Marston <tim@ed.am>.
#
# 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 general purpose makefile for use with Arduino hardware and
# software.  It works with the arduino-1.0 and later software releases.  It
# should work GNU/Linux and OS X.  To download the latest version of this
# makefile visit the following website where you can also find documentation on
# it's use.  (The following text can only really be considered a reference.)
#
#   http://ed.am/dev/make/arduino-mk
#
# This makefile can be used as a drop-in replacement for the Arduino IDE's
# build system.  To use it, just copy arduino.mk in to your project directory.
# Or, you could save it somewhere (I keep mine at ~/src/arduino.mk) and create
# a symlink to it in your project directory, named "Makefile".  For example:
#
#   $ ln -s ~/src/arduino.mk Makefile
#
# The Arduino software (version 1.0 or later) is required.  On GNU/Linux you
# can probably install the software from your package manager.  If you are
# using Debian (or a derivative), try `apt-get install arduino`.  Otherwise,
# you can download the Arduino software manually from http://arduino.cc/.  It
# is suggested that you install it at ~/opt/arduino (or /Applications on OS X)
# if you are unsure.
#
# If you downloaded the Arduino software manually and unpacked it somewhere
# other than ~/opt/arduino (or /Applications), you will need to set up the
# ARDUINODIR environment variable to be the path where you unpacked it.  (If
# unset, ARDUINODIR defaults to some sensible places).  You could set this in
# your ~/.profile by adding something like this:
#
#   export ARDUINODIR=~/somewhere/arduino-1.0
#
# For each project, you will also need to set BOARD to the type of Arduino
# you're building for.  Type `make boards` for a list of acceptable values.
# For example:
#
#   $ export BOARD=uno
#   $ make
#
# You may also need to set SERIALDEV if it is not detected correctly.
#
# The presence of a .ino (or .pde) file causes the arduino.mk to automatically
# determine values for SOURCES, TARGET and LIBRARIES.  Any .c, .cc and .cpp
# files in the project directory (or any "util" or "utility" subdirectories)
# are automatically included in the build and are scanned for Arduino libraries
# that have been #included.  Note, there can only be one .ino (or .pde) file in
# a project directory and if you want to be compatible with the Arduino IDE, it
# should be called the same as the directory name.
#
# Alternatively, if you want to manually specify build variables, create a
# Makefile that defines SOURCES and LIBRARIES and then includes arduino.mk.
# (There is no need to define TARGET).  You can also specify the BOARD here, if
# the project has a specific one.  Here is an example Makefile:
#
#   SOURCES := main.cc other.cc
#   LIBRARIES := EEPROM
#   BOARD := pro5v
#   include ~/src/arduino.mk
#
# Here is a complete list of configuration parameters:
#
# ARDUINODIR   The path where the Arduino software is installed on your system.
#
# ARDUINOCONST The Arduino software version, as an integer, used to define the
#              ARDUINO version constant.  This defaults to 100 if undefined.
#
# AVRDUDECONF  The avrdude.conf to use.  If undefined, this defaults to a guess
#              based on where avrdude is.  If set empty, no avrdude.conf is
#              passed to avrdude (so the system default is used).
#
# AVRDUDEFLAGS Specify any additional flags for avrdude.  The usual flags,
#              required to build the project, will be appended to this.
#
# AVRTOOLSPATH A space-separated list of directories that is searched in order
#              when looking for the avr build tools.  This defaults to PATH,
#              followed by subdirectories in ARDUINODIR.
#
# BOARD        Specify a target board type.  Run `make boards` to see available
#              board types.
#
# CPPFLAGS     Specify any additional flags for the compiler.  The usual flags,
#              required to build the project, will be appended to this.
#
# LINKFLAGS    Specify any additional flags for the linker.  The usual flags,
#              required to build the project, will be appended to this.
#
# LIBRARIES    A list of Arduino libraries to build and include.  This is set
#              automatically if a .ino (or .pde) is found.
#
# LIBRARYPATH  A space-separated list of directories that is searched in order
#              when looking for Arduino libraries.  This defaults to "libs",
#              "libraries" (in the project directory), then your sketchbook
#              "libraries" directory, then the Arduino libraries directory.
#
# SERIALDEV    The POSIX device name of the serial device that is the Arduino.
#              If unspecified, an attempt is made to guess the name of a
#              connected Arduino's serial device, which may work in some cases.
#
# SERIALMON    The name of the serial monitor program.
#              If unspecified, 'screen' is used as default program.
#
# SOURCES      A list of all source files of whatever language.  The language
#              type is determined by the file extension.  This is set
#              automatically if a .ino (or .pde) is found.
#
# TARGET       The name of the target file.  This is set automatically if a
#              .ino (or .pde) is found, but it is not necessary to set it
#              otherwise.
#
# This makefile also defines the following goals for use on the command line
# when you run make:
#
# all          This is the default if no goal is specified.  It builds the
#              target.
#
# target       Builds the target.
#
# eeprom       Builds the eeprom file for the target.
#
# upload       Uploads the target (building it, as necessary) to an attached
#              Arduino.
#
# clean        Deletes files created during the build.
#
# boards       Display a list of available board names, so that you can set the
#              BOARD environment variable appropriately.
#
# monitor      Start `screen` on the serial device.  This is meant to be an
#              equivalent to the Arduino serial monitor.
#
# size         Displays size information about the built target.
#
# bootloader   Burns the bootloader for your board to it.
#
# <file>       Builds the specified file, either an object file or the target,
#              from those that that would be built for the project.
#_______________________________________________________________________________
#

# default arduino software directory, check software exists
ifndef ARDUINODIR
ARDUINODIR := $(firstword $(wildcard ~/opt/arduino /usr/share/arduino \
	/Applications/Arduino.app/Contents/Resources/Java \
	$(HOME)/Applications/Arduino.app/Contents/Resources/Java))
endif
ifeq "$(wildcard $(ARDUINODIR)/hardware/arduino/boards.txt)" ""
$(error ARDUINODIR is not set correctly; arduino software not found)
endif

# default arduino version
ARDUINOCONST ?= 100

# default path for avr tools
AVRTOOLSPATH ?= $(subst :, , $(PATH)) $(ARDUINODIR)/hardware/tools \
	$(ARDUINODIR)/hardware/tools/avr/bin

# default path to find libraries
LIBRARYPATH += libraries libs $(SKETCHBOOKDIR)/libraries $(ARDUINODIR)/libraries

# default serial device to a poor guess (something that might be an arduino)
SERIALDEVGUESS := 0
ifndef SERIALDEV
SERIALDEV := $(firstword $(wildcard \
	/dev/ttyACM? /dev/ttyUSB? /dev/tty.usbserial* /dev/tty.usbmodem*))
SERIALDEVGUESS := 1
endif

# default serial device monitor program
ifndef SERIALMON
SERIALMON := screen
endif

# no board?
ifndef BOARD
ifneq "$(MAKECMDGOALS)" "boards"
ifneq "$(MAKECMDGOALS)" "clean"
$(error BOARD is unset.  Type 'make boards' to see possible values)
endif
endif
endif

# obtain board parameters from the arduino boards.txt file
BOARDSFILE := $(ARDUINODIR)/hardware/arduino/boards.txt
readboardsparam = $(shell sed -ne "s/$(BOARD).$(1)=\(.*\)/\1/p" $(BOARDSFILE))
BOARD_BUILD_MCU := $(call readboardsparam,build.mcu)
BOARD_BUILD_FCPU := $(call readboardsparam,build.f_cpu)
BOARD_BUILD_VARIANT := $(call readboardsparam,build.variant)
BOARD_UPLOAD_SPEED := $(call readboardsparam,upload.speed)
BOARD_UPLOAD_PROTOCOL := $(call readboardsparam,upload.protocol)
BOARD_USB_VID := $(call readboardsparam,build.vid)
BOARD_USB_PID := $(call readboardsparam,build.pid)
BOARD_BOOTLOADER_UNLOCK := $(call readboardsparam,bootloader.unlock_bits)
BOARD_BOOTLOADER_LOCK := $(call readboardsparam,bootloader.lock_bits)
BOARD_BOOTLOADER_LFUSES := $(call readboardsparam,bootloader.low_fuses)
BOARD_BOOTLOADER_HFUSES := $(call readboardsparam,bootloader.high_fuses)
BOARD_BOOTLOADER_EFUSES := $(call readboardsparam,bootloader.extended_fuses)
BOARD_BOOTLOADER_PATH := $(call readboardsparam,bootloader.path)
BOARD_BOOTLOADER_FILE := $(call readboardsparam,bootloader.file)

# obtain preferences from the IDE's preferences.txt
PREFERENCESFILE := $(firstword $(wildcard \
	$(HOME)/.arduino/preferences.txt $(HOME)/Library/Arduino/preferences.txt))
ifneq "$(PREFERENCESFILE)" ""
readpreferencesparam = $(shell sed -ne "s/$(1)=\(.*\)/\1/p" $(PREFERENCESFILE))
SKETCHBOOKDIR := $(call readpreferencesparam,sketchbook.path)
endif

# invalid board?
ifeq "$(BOARD_BUILD_MCU)" ""
ifneq "$(MAKECMDGOALS)" "boards"
ifneq "$(MAKECMDGOALS)" "clean"
$(error BOARD is invalid.  Type 'make boards' to see possible values)
endif
endif
endif

# auto mode?
INOFILE := $(wildcard *.ino *.pde)
ifdef INOFILE
ifneq "$(words $(INOFILE))" "1"
$(error There is more than one .pde or .ino file in this directory!)
endif

# automatically determine sources and target
TARGET := $(basename $(INOFILE))
SOURCES := $(INOFILE) \
	$(wildcard *.c *.cc *.cpp *.C) \
	$(wildcard $(addprefix src/, *.c *.cc *.cpp *.C)) \
	$(wildcard $(addprefix util/, *.c *.cc *.cpp *.C)) \
	$(wildcard $(addprefix utility/, *.c *.cc *.cpp *.C))

# automatically determine included libraries
LIBRARIES := $(filter $(notdir $(wildcard $(addsuffix /*, $(LIBRARYPATH)))), \
	$(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(SOURCES)))

endif

# software
findsoftware = $(firstword $(wildcard $(addsuffix /$(1), $(AVRTOOLSPATH))))
CC := $(call findsoftware,avr-gcc)
CXX := $(call findsoftware,avr-g++)
LD := $(call findsoftware,avr-ld)
AR := $(call findsoftware,avr-ar)
OBJCOPY := $(call findsoftware,avr-objcopy)
OBJDUMP := $(call findsoftware,avr-objdump)
AVRDUDE := $(call findsoftware,avrdude)
AVRSIZE := $(call findsoftware,avr-size)

# directories
ARDUINOCOREDIR := $(ARDUINODIR)/hardware/arduino/cores/arduino
LIBRARYDIRS := $(foreach lib, $(LIBRARIES), \
	$(firstword $(wildcard $(addsuffix /$(lib), $(LIBRARYPATH)))))
LIBRARYDIRS += $(addsuffix /utility, $(LIBRARYDIRS))

# files
TARGET := $(if $(TARGET),$(TARGET),a.out)
OBJECTS := $(addsuffix .o, $(basename $(SOURCES)))
DEPFILES := $(patsubst %, .dep/%.dep, $(SOURCES))
ARDUINOLIB := .lib/arduino.a
ARDUINOLIBOBJS := $(foreach dir, $(ARDUINOCOREDIR) $(LIBRARYDIRS), \
	$(patsubst %, .lib/%.o, $(wildcard $(addprefix $(dir)/, *.c *.cpp))))
BOOTLOADERHEX := $(addprefix \
	$(ARDUINODIR)/hardware/arduino/bootloaders/$(BOARD_BOOTLOADER_PATH)/, \
	$(BOARD_BOOTLOADER_FILE))

# avrdude confifuration
ifeq "$(AVRDUDECONF)" ""
ifeq "$(AVRDUDE)" "$(ARDUINODIR)/hardware/tools/avr/bin/avrdude"
AVRDUDECONF := $(ARDUINODIR)/hardware/tools/avr/etc/avrdude.conf
else
AVRDUDECONF := $(wildcard $(AVRDUDE).conf)
endif
endif

# flags
CPPFLAGS += -Os -Wall -fno-exceptions -ffunction-sections -fdata-sections
CPPFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
CPPFLAGS += -mmcu=$(BOARD_BUILD_MCU)
CPPFLAGS += -DF_CPU=$(BOARD_BUILD_FCPU) -DARDUINO=$(ARDUINOCONST)
CPPFLAGS += -DUSB_VID=$(BOARD_USB_VID) -DUSB_PID=$(BOARD_USB_PID)
CPPFLAGS += -I. -Iutil -Iutility -I $(ARDUINOCOREDIR)
CPPFLAGS += -I $(ARDUINODIR)/hardware/arduino/variants/$(BOARD_BUILD_VARIANT)/
CPPFLAGS += $(addprefix -I , $(LIBRARYDIRS))
CPPDEPFLAGS = -MMD -MP -MF .dep/$<.dep
CPPINOFLAGS := -x c++ -include $(ARDUINOCOREDIR)/Arduino.h
AVRDUDEFLAGS += $(addprefix -C , $(AVRDUDECONF)) -DV
AVRDUDEFLAGS += -p $(BOARD_BUILD_MCU) -P $(SERIALDEV)
AVRDUDEFLAGS += -c $(BOARD_UPLOAD_PROTOCOL) -b $(BOARD_UPLOAD_SPEED)
LINKFLAGS += -Os -Wl,--gc-sections -mmcu=$(BOARD_BUILD_MCU)

# figure out which arg to use with stty (for OS X, GNU and busybox stty)
STTYFARG := $(shell stty --help 2>&1 | \
	grep -q 'illegal option' && echo -f || echo -F)

# include dependencies
ifneq "$(MAKECMDGOALS)" "clean"
-include $(DEPFILES)
endif

# default rule
.DEFAULT_GOAL := all

#_______________________________________________________________________________
#                                                                          RULES

.PHONY:	all target upload clean boards monitor size bootloader

all: target size

target: $(TARGET).hex

eeprom: target $(TARGET).eep

upload: target
	@echo "\nUploading to board..."
	@test -n "$(SERIALDEV)" || { \
		echo "error: SERIALDEV could not be determined automatically." >&2; \
		exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) || { \
		echo "*GUESSING* at serial device:" $(SERIALDEV); \
		echo; }
ifeq "$(BOARD_BOOTLOADER_PATH)" "caterina"
	stty $(STTYFARG) $(SERIALDEV) speed 1200
	sleep 1
else
	stty $(STTYFARG) $(SERIALDEV) hupcl
endif
	@echo "# writing flash.."
	$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(TARGET).hex:i
ifneq ("$(wildcard $(TARGET).eep)","")
#	EEP_FILE_EXISTS = 1
	@echo "# writing eeprom .."
	$(AVRDUDE) $(AVRDUDEFLAGS) -U eeprom:w:$(TARGET).eep:i
else
#	EEP_FILE_EXISTS = 0
	@echo "! no eeprom file found."
endif

clean:
	rm -f $(OBJECTS)
	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(ARDUINOLIB) *~
	rm -rf .lib .dep

boards:
	@echo "Available values for BOARD:"
	@sed -nEe '/^#/d; /^[^.]+\.name=/p' $(BOARDSFILE) | \
		sed -Ee 's/([^.]+)\.name=(.*)/\1            \2/' \
			-e 's/(.{12}) *(.*)/\1 \2/'

monitor:
	@test -n "$(SERIALDEV)" || { \
		echo "error: SERIALDEV could not be determined automatically." >&2; \
		exit 1; }
	@test -n `which screen` || { \
		echo "error: can't find GNU screen, you might need to install it." >&2 \
		exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) || { \
		echo "*GUESSING* at serial device:" $(SERIALDEV); \
		echo; }
	$(SERIALMON) $(SERIALDEV)

size: $(TARGET).elf
	echo && $(AVRSIZE) --format=avr --mcu=$(BOARD_BUILD_MCU) $(TARGET).elf

bootloader:
	@echo "Burning bootloader to board..."
	@test -n "$(SERIALDEV)" || { \
		echo "error: SERIALDEV could not be determined automatically." >&2; \
		exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) || { \
		echo "*GUESSING* at serial device:" $(SERIALDEV); \
		echo; }
	stty $(STTYFARG) $(SERIALDEV) hupcl
	$(AVRDUDE) $(AVRDUDEFLAGS) -U lock:w:$(BOARD_BOOTLOADER_UNLOCK):m
	$(AVRDUDE) $(AVRDUDEFLAGS) -eU lfuse:w:$(BOARD_BOOTLOADER_LFUSES):m
	$(AVRDUDE) $(AVRDUDEFLAGS) -U hfuse:w:$(BOARD_BOOTLOADER_HFUSES):m
ifneq "$(BOARD_BOOTLOADER_EFUSES)" ""
	$(AVRDUDE) $(AVRDUDEFLAGS) -U efuse:w:$(BOARD_BOOTLOADER_EFUSES):m
endif
ifneq "$(BOOTLOADERHEX)" ""
	$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(BOOTLOADERHEX):i
endif
	$(AVRDUDE) $(AVRDUDEFLAGS) -U lock:w:$(BOARD_BOOTLOADER_LOCK):m

# building the target

$(TARGET).hex: $(TARGET).elf
	$(OBJCOPY) -O ihex -R .eeprom $< $@

.INTERMEDIATE: $(TARGET).elf

$(TARGET).elf: $(ARDUINOLIB) $(OBJECTS)
	$(CC) $(LINKFLAGS) $(OBJECTS) $(ARDUINOLIB) -lm -o $@

%.o: %.c
	mkdir -p .dep/$(dir $<)
	$(COMPILE.c) $(CPPDEPFLAGS) -o $@ $<

%.o: %.cpp
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

%.o: %.cc
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

%.o: %.C
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

%.o: %.ino
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $(CPPINOFLAGS) $<

%.o: %.pde
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $(CPPINOFLAGS) $<

%.eep: %.elf
	$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
	--change-section-lma .eeprom=0 -O ihex $< $@
#	--no-change-warnings \
	@$(OBJDUMP) -h -j.eeprom $(TARGET).elf >/dev/null 2>/dev/null; rc=$$?; \
	if [ $$rc -gt 0 ]; then \
	echo "## EEPROM empty, removing file: $(TARGET).eep"; rm $(TARGET).eep; \
	fi

# building the arduino library

$(ARDUINOLIB): $(ARDUINOLIBOBJS)
	$(AR) rcs $@ $?

.lib/%.c.o: %.c
	mkdir -p $(dir $@)
	$(COMPILE.c) -o $@ $<

.lib/%.cpp.o: %.cpp
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

.lib/%.cc.o: %.cc
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

.lib/%.C.o: %.C
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

# Local Variables:
# mode: makefile
# tab-width: 4
# End:

## Makefile
# Hey Emacs, this is a -*- makefile -*-
#
# see: http://ed.am/dev/make/arduino-mk
#
#   SOURCES := main.c other.cpp
#   LIBRARIES := EEPROM SPI Adafruit_GFX Adafruit_ST7735
#   LIBRARYPATH :=
#   CPPFLAGS := -std=c++11 -Wl,-Map=foo.map -Wa,-aln=OUT.s
#   SERIALMON := cutecom
#
#LIBRARIES := SPI RF24
BOARD := pro5v328
SERIALDEV := /dev/ttyUSB0

# last step:
include ../arduino.mk
	#_______________________________________________________________________________
	#
	# (modified) Arduino makefile
	#_______________________________________________________________________________
	# version jan_0.6
	#
	# Copyright (C) 2011, 2012, 2013 Tim Marston <tim@ed.am>.
	#
	# 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 general purpose makefile for use with Arduino hardware and
	# software. It works with the arduino-1.0 and later software releases. It
	# should work GNU/Linux and OS X. To download the latest version of this
	# makefile visit the following website where you can also find documentation on
	# it's use. (The following text can only really be considered a reference.)
	#
	# http://ed.am/dev/make/arduino-mk
	#
	# This makefile can be used as a drop-in replacement for the Arduino IDE's
	# build system. To use it, just copy arduino.mk in to your project directory.
	# Or, you could save it somewhere (I keep mine at ~/src/arduino.mk) and create
	# a symlink to it in your project directory, named "Makefile". For example:
	#
	# $ ln -s ~/src/arduino.mk Makefile
	#
	# The Arduino software (version 1.0 or later) is required. On GNU/Linux you
	# can probably install the software from your package manager. If you are
	# using Debian (or a derivative), try `apt-get install arduino`. Otherwise,
	# you can download the Arduino software manually from http://arduino.cc/. It
	# is suggested that you install it at ~/opt/arduino (or /Applications on OS X)
	# if you are unsure.
	#
	# If you downloaded the Arduino software manually and unpacked it somewhere
	# other than ~/opt/arduino (or /Applications), you will need to set up the
	# ARDUINODIR environment variable to be the path where you unpacked it. (If
	# unset, ARDUINODIR defaults to some sensible places). You could set this in
	# your ~/.profile by adding something like this:
	#
	# export ARDUINODIR=~/somewhere/arduino-1.0
	#
	# For each project, you will also need to set BOARD to the type of Arduino
	# you're building for. Type `make boards` for a list of acceptable values.
	# For example:
	#
	# $ export BOARD=uno
	# $ make
	#
	# You may also need to set SERIALDEV if it is not detected correctly.
	#
	# The presence of a .ino (or .pde) file causes the arduino.mk to automatically
	# determine values for SOURCES, TARGET and LIBRARIES. Any .c, .cc and .cpp
	# files in the project directory (or any "util" or "utility" subdirectories)
	# are automatically included in the build and are scanned for Arduino libraries
	# that have been #included. Note, there can only be one .ino (or .pde) file in
	# a project directory and if you want to be compatible with the Arduino IDE, it
	# should be called the same as the directory name.
	#
	# Alternatively, if you want to manually specify build variables, create a
	# Makefile that defines SOURCES and LIBRARIES and then includes arduino.mk.
	# (There is no need to define TARGET). You can also specify the BOARD here, if
	# the project has a specific one. Here is an example Makefile:
	#
	# SOURCES := main.cc other.cc
	# LIBRARIES := EEPROM
	# BOARD := pro5v
	# include ~/src/arduino.mk
	#
	# Here is a complete list of configuration parameters:
	#
	# ARDUINODIR The path where the Arduino software is installed on your system.
	#
	# ARDUINOCONST The Arduino software version, as an integer, used to define the
	# ARDUINO version constant. This defaults to 100 if undefined.
	#
	# AVRDUDECONF The avrdude.conf to use. If undefined, this defaults to a guess
	# based on where avrdude is. If set empty, no avrdude.conf is
	# passed to avrdude (so the system default is used).
	#
	# AVRDUDEFLAGS Specify any additional flags for avrdude. The usual flags,
	# required to build the project, will be appended to this.
	#
	# AVRTOOLSPATH A space-separated list of directories that is searched in order
	# when looking for the avr build tools. This defaults to PATH,
	# followed by subdirectories in ARDUINODIR.
	#
	# BOARD Specify a target board type. Run `make boards` to see available
	# board types.
	#
	# CPPFLAGS Specify any additional flags for the compiler. The usual flags,
	# required to build the project, will be appended to this.
	#
	# LINKFLAGS Specify any additional flags for the linker. The usual flags,
	# required to build the project, will be appended to this.
	#
	# LIBRARIES A list of Arduino libraries to build and include. This is set
	# automatically if a .ino (or .pde) is found.
	#
	# LIBRARYPATH A space-separated list of directories that is searched in order
	# when looking for Arduino libraries. This defaults to "libs",
	# "libraries" (in the project directory), then your sketchbook
	# "libraries" directory, then the Arduino libraries directory.
	#
	# SERIALDEV The POSIX device name of the serial device that is the Arduino.
	# If unspecified, an attempt is made to guess the name of a
	# connected Arduino's serial device, which may work in some cases.
	#
	# SERIALMON The name of the serial monitor program.
	# If unspecified, 'screen' is used as default program.
	#
	# SOURCES A list of all source files of whatever language. The language
	# type is determined by the file extension. This is set
	# automatically if a .ino (or .pde) is found.
	#
	# TARGET The name of the target file. This is set automatically if a
	# .ino (or .pde) is found, but it is not necessary to set it
	# otherwise.
	#
	# This makefile also defines the following goals for use on the command line
	# when you run make:
	#
	# all This is the default if no goal is specified. It builds the
	# target.
	#
	# target Builds the target.
	#
	# eeprom Builds the eeprom file for the target.
	#
	# upload Uploads the target (building it, as necessary) to an attached
	# Arduino.
	#
	# clean Deletes files created during the build.
	#
	# boards Display a list of available board names, so that you can set the
	# BOARD environment variable appropriately.
	#
	# monitor Start `screen` on the serial device. This is meant to be an
	# equivalent to the Arduino serial monitor.
	#
	# size Displays size information about the built target.
	#
	# bootloader Burns the bootloader for your board to it.
	#
	# <file> Builds the specified file, either an object file or the target,
	# from those that that would be built for the project.
	#_______________________________________________________________________________
	#

	# default arduino software directory, check software exists
	ifndef ARDUINODIR
	ARDUINODIR := $(firstword $(wildcard ~/opt/arduino /usr/share/arduino \
	/Applications/Arduino.app/Contents/Resources/Java \
	$(HOME)/Applications/Arduino.app/Contents/Resources/Java))
	endif
	ifeq "$(wildcard $(ARDUINODIR)/hardware/arduino/boards.txt)" ""
	$(error ARDUINODIR is not set correctly; arduino software not found)
	endif

	# default arduino version
	ARDUINOCONST ?= 100

	# default path for avr tools
	AVRTOOLSPATH ?= $(subst :, , $(PATH)) $(ARDUINODIR)/hardware/tools \
	$(ARDUINODIR)/hardware/tools/avr/bin

	# default path to find libraries
	LIBRARYPATH += libraries libs $(SKETCHBOOKDIR)/libraries $(ARDUINODIR)/libraries

	# default serial device to a poor guess (something that might be an arduino)
	SERIALDEVGUESS := 0
	ifndef SERIALDEV
	SERIALDEV := $(firstword $(wildcard \
	/dev/ttyACM? /dev/ttyUSB? /dev/tty.usbserial* /dev/tty.usbmodem*))
	SERIALDEVGUESS := 1
	endif

	# default serial device monitor program
	ifndef SERIALMON
	SERIALMON := screen
	endif

	# no board?
	ifndef BOARD
	ifneq "$(MAKECMDGOALS)" "boards"
	ifneq "$(MAKECMDGOALS)" "clean"
	$(error BOARD is unset. Type 'make boards' to see possible values)
	endif
	endif
	endif

	# obtain board parameters from the arduino boards.txt file
	BOARDSFILE := $(ARDUINODIR)/hardware/arduino/boards.txt
	readboardsparam = $(shell sed -ne "s/$(BOARD).$(1)=\(.*\)/\1/p" $(BOARDSFILE))
	BOARD_BUILD_MCU := $(call readboardsparam,build.mcu)
	BOARD_BUILD_FCPU := $(call readboardsparam,build.f_cpu)
	BOARD_BUILD_VARIANT := $(call readboardsparam,build.variant)
	BOARD_UPLOAD_SPEED := $(call readboardsparam,upload.speed)
	BOARD_UPLOAD_PROTOCOL := $(call readboardsparam,upload.protocol)
	BOARD_USB_VID := $(call readboardsparam,build.vid)
	BOARD_USB_PID := $(call readboardsparam,build.pid)
	BOARD_BOOTLOADER_UNLOCK := $(call readboardsparam,bootloader.unlock_bits)
	BOARD_BOOTLOADER_LOCK := $(call readboardsparam,bootloader.lock_bits)
	BOARD_BOOTLOADER_LFUSES := $(call readboardsparam,bootloader.low_fuses)
	BOARD_BOOTLOADER_HFUSES := $(call readboardsparam,bootloader.high_fuses)
	BOARD_BOOTLOADER_EFUSES := $(call readboardsparam,bootloader.extended_fuses)
	BOARD_BOOTLOADER_PATH := $(call readboardsparam,bootloader.path)
	BOARD_BOOTLOADER_FILE := $(call readboardsparam,bootloader.file)

	# obtain preferences from the IDE's preferences.txt
	PREFERENCESFILE := $(firstword $(wildcard \
	$(HOME)/.arduino/preferences.txt $(HOME)/Library/Arduino/preferences.txt))
	ifneq "$(PREFERENCESFILE)" ""
	readpreferencesparam = $(shell sed -ne "s/$(1)=\(.*\)/\1/p" $(PREFERENCESFILE))
	SKETCHBOOKDIR := $(call readpreferencesparam,sketchbook.path)
	endif

	# invalid board?
	ifeq "$(BOARD_BUILD_MCU)" ""
	ifneq "$(MAKECMDGOALS)" "boards"
	ifneq "$(MAKECMDGOALS)" "clean"
	$(error BOARD is invalid. Type 'make boards' to see possible values)
	endif
	endif
	endif

	# auto mode?
	INOFILE := $(wildcard .ino .pde)
	ifdef INOFILE
	ifneq "$(words $(INOFILE))" "1"
	$(error There is more than one .pde or .ino file in this directory!)
	endif

	# automatically determine sources and target
	TARGET := $(basename $(INOFILE))
	SOURCES := $(INOFILE) \
	$(wildcard .c .cc .cpp .C) \
	$(wildcard $(addprefix src/, .c .cc .cpp .C)) \
	$(wildcard $(addprefix util/, .c .cc .cpp .C)) \
	$(wildcard $(addprefix utility/, .c .cc .cpp .C))

	# automatically determine included libraries
	LIBRARIES := $(filter $(notdir $(wildcard $(addsuffix /*, $(LIBRARYPATH)))), \
	$(shell sed -ne "s/^ \# include [<\"]\(.\)\.h[>\"]/\1/p" $(SOURCES)))

	endif

	# software
	findsoftware = $(firstword $(wildcard $(addsuffix /$(1), $(AVRTOOLSPATH))))
	CC := $(call findsoftware,avr-gcc)
	CXX := $(call findsoftware,avr-g++)
	LD := $(call findsoftware,avr-ld)
	AR := $(call findsoftware,avr-ar)
	OBJCOPY := $(call findsoftware,avr-objcopy)
	OBJDUMP := $(call findsoftware,avr-objdump)
	AVRDUDE := $(call findsoftware,avrdude)
	AVRSIZE := $(call findsoftware,avr-size)

	# directories
	ARDUINOCOREDIR := $(ARDUINODIR)/hardware/arduino/cores/arduino
	LIBRARYDIRS := $(foreach lib, $(LIBRARIES), \
	$(firstword $(wildcard $(addsuffix /$(lib), $(LIBRARYPATH)))))
	LIBRARYDIRS += $(addsuffix /utility, $(LIBRARYDIRS))

	# files
	TARGET := $(if $(TARGET),$(TARGET),a.out)
	OBJECTS := $(addsuffix .o, $(basename $(SOURCES)))
	DEPFILES := $(patsubst %, .dep/%.dep, $(SOURCES))
	ARDUINOLIB := .lib/arduino.a
	ARDUINOLIBOBJS := $(foreach dir, $(ARDUINOCOREDIR) $(LIBRARYDIRS), \
	$(patsubst %, .lib/%.o, $(wildcard $(addprefix $(dir)/, .c .cpp))))
	BOOTLOADERHEX := $(addprefix \
	$(ARDUINODIR)/hardware/arduino/bootloaders/$(BOARD_BOOTLOADER_PATH)/, \
	$(BOARD_BOOTLOADER_FILE))

	# avrdude confifuration
	ifeq "$(AVRDUDECONF)" ""
	ifeq "$(AVRDUDE)" "$(ARDUINODIR)/hardware/tools/avr/bin/avrdude"
	AVRDUDECONF := $(ARDUINODIR)/hardware/tools/avr/etc/avrdude.conf
	else
	AVRDUDECONF := $(wildcard $(AVRDUDE).conf)
	endif
	endif

	# flags
	CPPFLAGS += -Os -Wall -fno-exceptions -ffunction-sections -fdata-sections
	CPPFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
	CPPFLAGS += -mmcu=$(BOARD_BUILD_MCU)
	CPPFLAGS += -DF_CPU=$(BOARD_BUILD_FCPU) -DARDUINO=$(ARDUINOCONST)
	CPPFLAGS += -DUSB_VID=$(BOARD_USB_VID) -DUSB_PID=$(BOARD_USB_PID)
	CPPFLAGS += -I. -Iutil -Iutility -I $(ARDUINOCOREDIR)
	CPPFLAGS += -I $(ARDUINODIR)/hardware/arduino/variants/$(BOARD_BUILD_VARIANT)/
	CPPFLAGS += $(addprefix -I , $(LIBRARYDIRS))
	CPPDEPFLAGS = -MMD -MP -MF .dep/$<.dep
	CPPINOFLAGS := -x c++ -include $(ARDUINOCOREDIR)/Arduino.h
	AVRDUDEFLAGS += $(addprefix -C , $(AVRDUDECONF)) -DV
	AVRDUDEFLAGS += -p $(BOARD_BUILD_MCU) -P $(SERIALDEV)
	AVRDUDEFLAGS += -c $(BOARD_UPLOAD_PROTOCOL) -b $(BOARD_UPLOAD_SPEED)
	LINKFLAGS += -Os -Wl,--gc-sections -mmcu=$(BOARD_BUILD_MCU)

	# figure out which arg to use with stty (for OS X, GNU and busybox stty)
	STTYFARG := $(shell stty --help 2>&1 \| \
	grep -q 'illegal option' && echo -f \|\| echo -F)

	# include dependencies
	ifneq "$(MAKECMDGOALS)" "clean"
	-include $(DEPFILES)
	endif

	# default rule
	.DEFAULT_GOAL := all

	#_______________________________________________________________________________
	# RULES

	.PHONY: all target upload clean boards monitor size bootloader

	all: target size

	target: $(TARGET).hex

	eeprom: target $(TARGET).eep

	upload: target
	@echo "\nUploading to board..."
	@test -n "$(SERIALDEV)" \|\| { \
	echo "error: SERIALDEV could not be determined automatically." >&2; \
	exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) \|\| { \
	echo "GUESSING at serial device:" $(SERIALDEV); \
	echo; }
	ifeq "$(BOARD_BOOTLOADER_PATH)" "caterina"
	stty $(STTYFARG) $(SERIALDEV) speed 1200
	sleep 1
	else
	stty $(STTYFARG) $(SERIALDEV) hupcl
	endif
	@echo "# writing flash.."
	$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(TARGET).hex:i
	ifneq ("$(wildcard $(TARGET).eep)","")
	# EEP_FILE_EXISTS = 1
	@echo "# writing eeprom .."
	$(AVRDUDE) $(AVRDUDEFLAGS) -U eeprom:w:$(TARGET).eep:i
	else
	# EEP_FILE_EXISTS = 0
	@echo "! no eeprom file found."
	endif

	clean:
	rm -f $(OBJECTS)
	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).eep $(ARDUINOLIB) *~
	rm -rf .lib .dep

	boards:
	@echo "Available values for BOARD:"
	@sed -nEe '/^#/d; /^[^.]+\.name=/p' $(BOARDSFILE) \| \
	sed -Ee 's/([^.]+)\.name=(.*)/\1 \2/' \
	-e 's/(.{12}) (.)/\1 \2/'

	monitor:
	@test -n "$(SERIALDEV)" \|\| { \
	echo "error: SERIALDEV could not be determined automatically." >&2; \
	exit 1; }
	@test -n `which screen` \|\| { \
	echo "error: can't find GNU screen, you might need to install it." >&2 \
	exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) \|\| { \
	echo "GUESSING at serial device:" $(SERIALDEV); \
	echo; }
	$(SERIALMON) $(SERIALDEV)

	size: $(TARGET).elf
	echo && $(AVRSIZE) --format=avr --mcu=$(BOARD_BUILD_MCU) $(TARGET).elf

	bootloader:
	@echo "Burning bootloader to board..."
	@test -n "$(SERIALDEV)" \|\| { \
	echo "error: SERIALDEV could not be determined automatically." >&2; \
	exit 1; }
	@test 0 -eq $(SERIALDEVGUESS) \|\| { \
	echo "GUESSING at serial device:" $(SERIALDEV); \
	echo; }
	stty $(STTYFARG) $(SERIALDEV) hupcl
	$(AVRDUDE) $(AVRDUDEFLAGS) -U lock:w:$(BOARD_BOOTLOADER_UNLOCK):m
	$(AVRDUDE) $(AVRDUDEFLAGS) -eU lfuse:w:$(BOARD_BOOTLOADER_LFUSES):m
	$(AVRDUDE) $(AVRDUDEFLAGS) -U hfuse:w:$(BOARD_BOOTLOADER_HFUSES):m
	ifneq "$(BOARD_BOOTLOADER_EFUSES)" ""
	$(AVRDUDE) $(AVRDUDEFLAGS) -U efuse:w:$(BOARD_BOOTLOADER_EFUSES):m
	endif
	ifneq "$(BOOTLOADERHEX)" ""
	$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(BOOTLOADERHEX):i
	endif
	$(AVRDUDE) $(AVRDUDEFLAGS) -U lock:w:$(BOARD_BOOTLOADER_LOCK):m

	# building the target

	$(TARGET).hex: $(TARGET).elf
	$(OBJCOPY) -O ihex -R .eeprom $< $@

	.INTERMEDIATE: $(TARGET).elf

	$(TARGET).elf: $(ARDUINOLIB) $(OBJECTS)
	$(CC) $(LINKFLAGS) $(OBJECTS) $(ARDUINOLIB) -lm -o $@

	%.o: %.c
	mkdir -p .dep/$(dir $<)
	$(COMPILE.c) $(CPPDEPFLAGS) -o $@ $<

	%.o: %.cpp
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

	%.o: %.cc
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

	%.o: %.C
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $<

	%.o: %.ino
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $(CPPINOFLAGS) $<

	%.o: %.pde
	mkdir -p .dep/$(dir $<)
	$(COMPILE.cpp) $(CPPDEPFLAGS) -o $@ $(CPPINOFLAGS) $<

	%.eep: %.elf
	$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
	--change-section-lma .eeprom=0 -O ihex $< $@
	# --no-change-warnings \
	@$(OBJDUMP) -h -j.eeprom $(TARGET).elf >/dev/null 2>/dev/null; rc=$$?; \
	if [ $$rc -gt 0 ]; then \
	echo "## EEPROM empty, removing file: $(TARGET).eep"; rm $(TARGET).eep; \
	fi

	# building the arduino library

	$(ARDUINOLIB): $(ARDUINOLIBOBJS)
	$(AR) rcs $@ $?

	.lib/%.c.o: %.c
	mkdir -p $(dir $@)
	$(COMPILE.c) -o $@ $<

	.lib/%.cpp.o: %.cpp
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

	.lib/%.cc.o: %.cc
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

	.lib/%.C.o: %.C
	mkdir -p $(dir $@)
	$(COMPILE.cpp) -o $@ $<

	# Local Variables:
	# mode: makefile
	# tab-width: 4
	# End:
	# Hey Emacs, this is a -- makefile --
	#
	# see: http://ed.am/dev/make/arduino-mk
	#
	# SOURCES := main.c other.cpp
	# LIBRARIES := EEPROM SPI Adafruit_GFX Adafruit_ST7735
	# LIBRARYPATH :=
	# CPPFLAGS := -std=c++11 -Wl,-Map=foo.map -Wa,-aln=OUT.s
	# SERIALMON := cutecom
	#
	#LIBRARIES := SPI RF24
	BOARD := pro5v328
	SERIALDEV := /dev/ttyUSB0

	# last step:
	include ../arduino.mk