#    MIT License
#
#    Copyright (c) 2018, Alexey Dynda
#
#    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.
#
#################################################################
# Makefile to build ssd1306 examples for different platforms
#
# Accept the following parameters:
# CC
# CXX
# STRIP
# AR
# MCU
# FREQUENCY
#
# ADAFRUIT=y                                  - compile Adafruit GFX module
# ADAFRUIT_DIR=path_to_adafruit_gfx_library

default: all

DESTDIR ?=
BLD ?= ../bld
PROJECT ?= ssd1306_demo
PROJECTS = $(subst /,,$(wildcard */))
BACKSLASH?=/
OUTFILE?=$(BLD)/$(PROJECT).out
MKDIR?=mkdir -p
convert=$(subst /,$(BACKSLASH),$1)

.SUFFIXES: .bin .out .hex .srec

$(BLD)/%.o: %.c
	-$(MKDIR) $(call convert,$(dir $@))
	$(CC) -std=gnu11 $(CCFLAGS) $(CCFLAGS-$@) $(CCFLAGS-$(basename $(notdir $@))) -c $< -o $@

$(BLD)/%.o: %.ino
	-$(MKDIR) $(call convert,$(dir $@))
	$(CXX) -std=c++11 $(CCFLAGS) $(CXXFLAGS) -x c++ -c $< -o $@

$(BLD)/%.o: %.cpp
	-$(MKDIR) $(call convert,$(dir $@))
	$(CXX) -std=c++11 $(CCFLAGS) $(CXXFLAGS) $(CCFLAGS-$(basename $(notdir $@))) -c $< -o $@

############### OPTIONS #######################

ifeq ($(ADAFRUIT),y)
ADAFRUIT_DIR ?= $(shell readlink -f ~)/Arduino/libraries/Adafruit_GFX_Library

INCLUDES += -I$(ADAFRUIT_DIR)

CCFLAGS-Adafruit_GFX= -DARDUINO=100

SRCS += \
       $(ADAFRUIT_DIR)/Adafruit_GFX.cpp
endif


# ************* Common defines ********************

INCLUDES += \
	-I./$(PROJECT) \
	-I../src

CXXFLAGS +=  -fno-rtti

CCFLAGS += -MD -g -Os -w -ffreestanding $(INCLUDES) -Wall -Werror \
	-Wl,--gc-sections -ffunction-sections -fdata-sections \
	$(EXTRA_CCFLAGS)

.PHONY: clean ssd1306 all help

SRCS += main.cpp \
       $(wildcard $(PROJECT)/*.cpp) \
       $(wildcard $(PROJECT)/*.ino)

OBJS = $(addprefix $(BLD)/, $(addsuffix .o, $(basename $(SRCS))))

LDFLAGS += -L$(BLD) -lssd1306

####################### Compiling library #########################

ssd1306:
	$(MAKE) -C ../src -f Makefile.$(platform) MCU=$(MCU) SDL_EMULATION=$(SDL_EMULATION) \
	                     ADAFRUIT=$(ADAFRUIT)

all: $(OUTFILE)

$(OUTFILE): $(OBJS) ssd1306
	-$(MKDIR) $(call convert,$(dir $@))
	$(CC) -o $(OUTFILE) $(CCFLAGS) $(OBJS) $(LDFLAGS)

clean:
	rm -rf $(BLD)
	rm -f *~ *.out *.bin *.hex *.srec *.s *.o *.pdf *core

help:
	@echo "Makefile accepts the following options:"
	@echo "    ADAFRUIT=y/n       Enables compilation of Adafruit GFX library"
	@echo "    ADAFRUIT_DIR=path  Path to Adafruit GFX library"
	@echo "    SDL_EMULATION=y/n  Enables SDL emulator in the library"
	@echo "    FREQUENCY=N        Frequency in Hz"
	@echo "    MCU=mcu_code       Specifies MCU to compile for (valid for AVR)"

-include $(OBJS:%.o=%.d)