#
# Copyright 2011 Alan Burlison, alan@bleaklow.com.  All rights reserved.
# Subsequently modified by Matthieu Weber, matthieu.weber@jyu.fi.
# Use is subject to license terms.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#  1. Redistributions of source code must retain the above copyright notice,
#     this list of conditions and the following disclaimer.
#
#  2. Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions and the following disclaimer in the documentation
#     and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY ALAN BURLISON "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL ALAN BURLISON OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Makefile for building Arduino projects outside of the Arduino environment
#
# This makefile should be included into a per-project Makefile of the following
# form:
#
# ----------
# BOARD = mega
# PORT = /dev/term/0
# INC_DIRS = ../common
# LIB_DIRS = ../libraries/Task ../../libraries/VirtualWire
# include ../../Makefile.master
# ----------
#
# Where:
#   BOARD    : Arduino board type, from $(ARD_HOME)/hardware/boards.txt
#   PORT     : USB port
#   INC_DIRS : List pf directories containing header files
#   LIB_DIRS : List of directories containing library source
#
# Before using this Makefile you can adjust the following macros to suit
# your environment, either by editing this file directly or by defining them in
# the Makefile that includes this one, in which case they will override the
# definitions below:
#   ARD_REV      : arduino software revision, e.g. 0017, 0018
#   ARD_HOME     : installation directory of the Arduino software.
#   ARD_BIN      : location of compiler binaries
#   AVRDUDE      : location of avrdude executable
#   AVRDUDE_CONF : location of avrdude configuration file
#   PROGRAMMER   : avrdude programmer type
#   MON_TERM     : terminal command for serial monitor
#   MON_CMD      : serial monitor command
#   MON_SPEED    : serial monitor speed
#

# Global configuration.
ARD_REV ?= 100
ARD_HOME ?= /usr/local/arduino
ARD_BIN ?= /usr/bin
AVRDUDE ?= $(ARD_HOME)/hardware/tools/avrdude
AVRDUDE_CONF ?= $(ARD_HOME)/hardware/tools/avrdude.conf
MON_TERM ?= xterm
MON_SPEED ?= 57600
MON_CMD ?= picocom
PORT ?= $(HOME)/dev/arduino
BOARD ?= atmega328


### Nothing below here should require editing. ###

# Check for the required definitions.

ifndef BOARD
    $(error $$(BOARD) not defined)
endif
ifndef PORT
    $(error $$(PORT) not defined)
endif

# Version-specific settings
ARD_BOARDS = $(ARD_HOME)/hardware/arduino/boards.txt
ARD_SRC_DIR = $(ARD_HOME)/hardware/arduino/cores/arduino
ARD_MAIN = $(ARD_SRC_DIR)/main.cpp

# Standard macros.
SKETCH = $(notdir $(CURDIR))
BUILD_DIR = build
VPATH = $(LIB_DIRS)

# Macros derived from boards.txt
MCU := $(shell sed -n 's/$(BOARD)\.build\.mcu=\(.*\)/\1/p' < $(ARD_BOARDS))
F_CPU := $(shell sed -n 's/$(BOARD)\.build\.f_cpu=\(.*\)/\1/p' < $(ARD_BOARDS))
UPLOAD_SPEED := \
    $(shell sed -n 's/$(BOARD)\.upload\.speed=\(.*\)/\1/p' < $(ARD_BOARDS))
PROGRAMMER := \
    $(shell sed -n 's/$(BOARD)\.upload\.protocol=\(.*\)/\1/p' < $(ARD_BOARDS))
ARD_VAR := \
	$(shell sed -n 's/$(BOARD)\.build\.variant=\(.*\)/\1/p' < $(ARD_BOARDS))
USB_PID := \
	$(shell sed -n 's/$(BOARD)\.build\.pid=\(.*\)/\1/p' < $(ARD_BOARDS))
USB_VID := \
	$(shell sed -n 's/$(BOARD)\.build\.vid=\(.*\)/\1/p' < $(ARD_BOARDS))

# More Version-specific settings
ARD_VAR_DIR = $(ARD_HOME)/hardware/arduino/variants/$(ARD_VAR)

# Build tools.
CC = $(ARD_BIN)/avr-gcc
CXX = $(ARD_BIN)/avr-g++
CXXFILT = $(ARD_BIN)/avr-c++filt
OBJCOPY = $(ARD_BIN)/avr-objcopy
OBJDUMP = $(ARD_BIN)/avr-objdump
AR = $(ARD_BIN)/avr-ar
SIZE = $(ARD_BIN)/avr-size
NM = $(ARD_BIN)/avr-nm
MKDIR = mkdir -p
RM = rm -rf
MV = mv -f
LN = ln -f

# Compiler flags.
INC_FLAGS = \
    $(addprefix -I,$(INC_DIRS)) $(addprefix -I,$(LIB_DIRS)) -I$(ARD_SRC_DIR) -I$(ARD_VAR_DIR)
ARD_FLAGS = -mmcu=$(MCU) -DF_CPU=$(F_CPU) -DARDUINO=$(ARD_REV)
ifeq ($(BOARD),leonardo)
    ARD_FLAGS += -DUSB_PID=$(USB_PID) -DUSB_VID=$(USB_VID)
endif
C_CXX_FLAGS = \
    -Wall -Wextra -Wundef -Wno-unused-parameter \
    -fdiagnostics-show-option -g -Wa,-adhlns=$(BUILD_DIR)/$*.lst 
C_FLAGS = \
    $(C_CXX_FLAGS) -std=gnu99 -Wstrict-prototypes -Wno-old-style-declaration
CXX_FLAGS = $(C_CXX_FLAGS)

# Optimiser flags.
#     optimise for size, unsigned by default, pack data.
#     separate sections, drop unused ones, shorten branches, jumps.
#     don't inline, vectorise loops. no exceptions.
#     no os preamble, use function calls in prologues.
# http://gcc.gnu.org/onlinedocs/gcc-4.3.5/gcc/
# http://www.tty1.net/blog/2008-04-29-avr-gcc-optimisations_en.html
OPT_FLAGS = \
     -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums \
    -ffunction-sections -fdata-sections -Wl,--gc-sections,--relax \
    -fno-inline-small-functions -fno-tree-scev-cprop -fno-exceptions \
    -ffreestanding -mcall-prologues

# Build parameters.
IMAGE = $(BUILD_DIR)/$(SKETCH)
ARD_C_SRC = $(wildcard $(ARD_SRC_DIR)/*.c)
ARD_CXX_SRC = $(wildcard $(ARD_SRC_DIR)/*.cpp)
ARD_C_OBJ = $(patsubst %.c,%.o,$(notdir $(ARD_C_SRC)))
ARD_CXX_OBJ = $(patsubst %.cpp,%.o,$(notdir $(ARD_CXX_SRC)))
ARD_LIB = arduino
ARD_AR = $(BUILD_DIR)/lib$(ARD_LIB).a
ARD_AR_OBJ = $(ARD_AR)($(ARD_C_OBJ) $(ARD_CXX_OBJ))
ARD_LD_FLAG = -l$(ARD_LIB)

# Workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34734
$(ARD_AR)(Tone.o) : CXX_FLAGS += -w

# Sketch libraries.
LIB_C_SRC = $(foreach ld,$(LIB_DIRS),$(wildcard $(ld)/*.c))
LIB_CXX_SRC = $(foreach ld,$(LIB_DIRS),$(wildcard $(ld)/*.cpp))
LIB_SRC = $(LIB_C_SRC) $(LIB_CXX_SRC)
ifneq "$(strip $(LIB_C_SRC) $(LIB_CXX_SRC))" "" 
	LIB_C_OBJ = $(patsubst %.c,%.o,$(notdir $(LIB_C_SRC)))
	LIB_CXX_OBJ = $(patsubst %.cpp,%.o,$(notdir $(LIB_CXX_SRC)))
	LIB_LIB = library
	LIB_AR = $(BUILD_DIR)/lib$(LIB_LIB).a
	LIB_AR_OBJ = $(LIB_AR)($(LIB_C_OBJ) $(LIB_CXX_OBJ))
	LIB_LD_FLAG = -l$(LIB_LIB)
endif

# Sketch PDE source.
SKT_PDE_SRC = $(wildcard *.pde *.ino)
ifneq "$(strip $(SKT_PDE_SRC))" ""
	SKT_PDE_OBJ = $(BUILD_DIR)/$(SKETCH)_pde.o
endif

# C and C++ source.
SKT_C_SRC = $(wildcard *.c)
SKT_CXX_SRC = $(wildcard *.cpp)
ifneq "$(strip $(SKT_C_SRC) $(SKT_CXX_SRC))" ""
	SKT_C_OBJ = $(patsubst %.c,%.o,$(SKT_C_SRC))
	SKT_CXX_OBJ = $(patsubst %.cpp,%.o,$(SKT_CXX_SRC))
	SKT_LIB = sketch
	SKT_AR = $(BUILD_DIR)/lib$(SKT_LIB).a
	SKT_AR_OBJ = $(SKT_AR)($(SKT_C_OBJ) $(SKT_CXX_OBJ))
	SKT_LD_FLAG = -l$(SKT_LIB)
endif

# Definitions.
define run-cc
	@ $(CC) $(ARD_FLAGS) $(INC_FLAGS) -M -MT '$@($%)' -MF $@_$*.dep $<
	$(CC) -c $(C_FLAGS) $(OPT_FLAGS) $(ARD_FLAGS) $(INC_FLAGS) \
	    $< -o $(BUILD_DIR)/$%
	@ $(AR) rc $@ $(BUILD_DIR)/$%
	@ $(RM) $(BUILD_DIR)/$%
	@ $(CXXFILT) < $(BUILD_DIR)/$*.lst > $(BUILD_DIR)/$*.lst.tmp
	@ $(MV) $(BUILD_DIR)/$*.lst.tmp $(BUILD_DIR)/$*.lst
endef

define run-cxx
	@ $(CXX) $(ARD_FLAGS) $(INC_FLAGS) -M -MT '$@($%)' -MF $@_$*.dep $<
	$(CXX) -c $(CXX_FLAGS) $(OPT_FLAGS) $(ARD_FLAGS) $(INC_FLAGS) \
	    $< -o $(BUILD_DIR)/$%
	@ $(AR) rc $@ $(BUILD_DIR)/$%
	@ $(RM) $(BUILD_DIR)/$%
	@ $(CXXFILT) < $(BUILD_DIR)/$*.lst > $(BUILD_DIR)/$*.lst.tmp
	@ $(MV) $(BUILD_DIR)/$*.lst.tmp $(BUILD_DIR)/$*.lst
endef

# Rules.
.PHONY : all clean upload monitor upload_monitor

all : $(BUILD_DIR) $(IMAGE).hex

clean :
	$(RM) $(BUILD_DIR)

$(BUILD_DIR) :
	$(MKDIR) $@

$(SKT_PDE_OBJ) : $(SKT_PDE_SRC)
	if [ $(ARD_REV) -ge 100 ]; then \
    echo '#include "Arduino.h"' > $(BUILD_DIR)/$(SKETCH)_pde.cpp; \
	else \
    echo '#include "WProgram.h"' > $(BUILD_DIR)/$(SKETCH)_pde.cpp; \
	fi
	echo '#include "$(SKT_PDE_SRC)"' >> $(BUILD_DIR)/$(SKETCH)_pde.cpp
	$(LN) $(SKT_PDE_SRC) $(BUILD_DIR)/$(SKT_PDE_SRC)
	cd $(BUILD_DIR) && $(CXX) -c $(subst build/,,$(CXX_FLAGS)) \
	    $(OPT_FLAGS) $(ARD_FLAGS) -I.. \
	    $(patsubst -I..%,-I../..%,$(INC_FLAGS)) \
	    $(SKETCH)_pde.cpp -o $(@F)

(%.o) : $(ARD_SRC_DIR)/%.c
	$(run-cc)

(%.o) : $(ARD_SRC_DIR)/%.cpp
	$(run-cxx)

(%.o) : %.c
	$(run-cc)

(%.o) : %.cpp
	$(run-cxx)

$(BUILD_DIR)/%.d : %.c
	$(run-cc-d)

$(BUILD_DIR)/%.d : %.cpp
	$(run-cxx-d)

$(IMAGE).hex : $(ARD_AR_OBJ) $(LIB_AR_OBJ) $(SKT_AR_OBJ) $(SKT_PDE_OBJ)
	$(CC) $(CXX_FLAGS) $(OPT_FLAGS) $(ARD_FLAGS) -L$(BUILD_DIR) \
	    $(SKT_PDE_OBJ) $(SKT_LD_FLAG) $(LIB_LD_FLAG) $(ARD_LD_FLAG) -lm \
	    -o $(IMAGE).elf
	$(OBJCOPY) -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load \
	    --no-change-warnings --change-section-lma .eeprom=0 $(IMAGE).elf \
	    $(IMAGE).eep
	$(OBJCOPY) -O ihex -R .eeprom $(IMAGE).elf $(IMAGE).hex
	$(OBJDUMP) -h -S $(IMAGE).elf | $(CXXFILT) -t > $(IMAGE).lst
	$(SIZE) $(IMAGE).hex

upload : all
	- pkill -f '$(MON_CMD).*$(PORT)'
	- sleep 1  
	- [ $(BOARD) = "leonardo" ] \
	  && ard-reset-arduino --caterina $(PORT) \
		|| stty -F $(PORT) hupcl
	- $(AVRDUDE) -V -C$(AVRDUDE_CONF) -p$(MCU) -c$(PROGRAMMER) -P$(PORT) \
	    -b$(UPLOAD_SPEED) -D -Uflash:w:$(IMAGE).hex:i

monitor :
	LD_LIBRARY_PATH= LD_PRELOAD= \
	    $(MON_TERM) -title '$(BOARD) $(PORT)' \
	    -e '$(MON_CMD) -b $(MON_SPEED) $(PORT)' &

upload_monitor : upload monitor

-include $(wildcard $(BUILD_DIR)/*.dep))
# vim:ft=make