#############  program name
	TARGET	= PIR_NEW

# program version
	VER_MAJOR	= 0
	VER_MINOR	= 1

	TOOL	= arm-none-eabi-

# compile options 
	MCU			= cortex-m3
	OPTIMIZE	= -O2
	USE_LTO		= NO

# Select family 
	CHIP		= LPC1756

#defines
	DEFS	= -D$(CHIP)
	DEFS	+= -DVER_MAJOR=$(VER_MAJOR)
	DEFS	+= -DVER_MINOR=$(VER_MINOR)

###########################################################
#  common part for all my cortex-m3 projects
###########################################################

	BASE		= ../
	CC			= $(TOOL)gcc
	CXX			= $(TOOL)g++
	LD			= $(TOOL)gcc
	AS			= $(CC) -x assembler-with-cpp
	OBJCOPY		= $(TOOL)objcopy
	OBJDUMP		= $(TOOL)objdump
	SIZE		= $(TOOL)size -d
	FLASHER		= openocd
	RM			= rm -f
	CP			= cp
	MD			= mkdir

#  dirs
	SRCDIR		= $(BASE)
	OBJDIR		= obj
	EXEDIR		= exe
	LSTDIR		= lst
	PRJDIR		= prj
	BAKDIR		= bak

#files
	HEX		= $(EXEDIR)/$(TARGET).hex
	BIN		= $(EXEDIR)/$(TARGET).bin
	ELF		= $(EXEDIR)/$(TARGET).elf
	MAP		= $(LSTDIR)/$(TARGET).map
	LSS		= $(LSTDIR)/$(TARGET).lss
	OK		= $(EXEDIR)/$(TARGET).ok

	COMMON	= $(BASE)/codesourcery

# CMSIS
	CM3DIR		= $(BASE)/cmsis \
				  $(BASE)/cmsis_boot
	LPC17DIRS	= $(BASE)/lpc17xx_lib 
 
# linker script (chip dependent)
	LD_SCRIPT	= $(CHIP).ld

# source directories (all *.c, *.cpp and *.S files included)
	DIRS	:= $(SRCDIR)
	DIRS	+= $(CM3DIR)
	DIRS	+= $(LPC17DIRS)
	DIRS	+= $(COMMON)
	DIRS	+= $(BASE)
	DIRS	+= $(BASE)/log
	DIRS	+= $(BASE)/at45db081
	DIRS	+= $(BASE)/fatfs
	DIRS	+= $(BASE)/freemodbus
	DIRS	+= $(BASE)/freertos
	DIRS	+= $(BASE)/h
	DIRS	+= $(BASE)/in_out
	DIRS	+= $(BASE)/LPCUSB
	DIRS	+= $(BASE)/syscals 
	
# includes
	INCS	:= $(patsubst %, -I "%", $(DIRS))
	
# individual source files
	SRCS	:= $(BASE)main.c
	SRCS	+= $(BASE)eeprom.c
	SRCS	+= $(BASE)rtc_cal.c
	

#calc obj files list
	OBJS	:= $(SRCS)
	OBJS	+= $(wildcard $(addsuffix /*.cpp, $(DIRS)))
	OBJS	+= $(wildcard $(addsuffix /*.c, $(DIRS)))
	OBJS	+= $(wildcard $(addsuffix /*.S, $(DIRS)))
	OBJS	:= $(notdir $(OBJS))
	OBJS	:= $(OBJS:.cpp=.o)
	OBJS	:= $(OBJS:.c=.o)
	OBJS	:= $(OBJS:.S=.o)
	OBJS	:= $(patsubst %, $(OBJDIR)/%, $(OBJS))

#files to archive
	ARCFILES	= \
		$(SRCDIR) \
		$(PRJDIR) \
		$(SCMDIR) \
		$(BASE)/makefile \
		$(BASE)/.cproject \
		$(BASE)/.project

# flags
	FLAGS	= -mcpu=$(MCU) -mthumb
	FLAGS	+= $(INCS)
	FLAGS	+= -MD
	FLAGS	+= $(DEFS)
	FLAGS	+= -Wa,-adhlns=$(addprefix $(LSTDIR)/, $(notdir $(addsuffix .lst, $(basename $<))))

	AFLAGS	= $(FLAGS)

	WARN	=  -Wall -Wextra
	WARN	+= -Wshadow -Wcast-qual -Wcast-align
	WARN	+= -Wredundant-decls
	WARN	+= -Wpointer-arith
#	WARN	+= -Wunreachable-code
#	WARN	+= -pedantic
	
	CFLAGS	= $(FLAGS)
	CFLAGS	+= $(OPTIMIZE)
	CFLAGS	+= -std=gnu99
	CFLAGS	+= -g
	CFLAGS	+=-I$(BASE)/freertos/portable
	CFLAGS	+=-I$(BASE)/freertos/include
	CFLAGS	+=-I$(BASE)/lpc17xx_lib/include
	CFLAGS	+=-I$(BASE)/at45db081/header
	CFLAGS	+=-I$(BASE)/cmsis_boot/
	CFLAGS	+=-I$(BASE)/fatfs/
	CFLAGS	+=-I$(BASE)/freemodbus/include
	CFLAGS	+=-I$(BASE)/freemodbus/port
	CFLAGS	+=-I$(BASE)/freemodbus/rtu
	CFLAGS	+=-I$(BASE)/freemodbus/ascii
	CFLAGS	+=-I$(BASE)/h
	CFLAGS	+=-I$(BASE)/log
	CFLAGS	+=-I$(BASE)/LPCUSB
	CFLAGS	+=-I$(BASE)/
	
	CFLAGS	+= -ffunction-sections -fdata-sections
	CFLAGS	+= $(WARN)
	CFLAGS	+= -Wimplicit
	CFLAGS	+= -Wnested-externs 

	CXXFLAGS	= $(FLAGS)
	CXXFLAGS	+= $(OPTIMIZE)
	CXXFLAGS	+= -g
	CXXFLAGS	+= -fno-exceptions -fno-rtti
	CXXFLAGS	+= -ffunction-sections -fdata-sections
	CXXFLAGS	+= -fno-threadsafe-statics
	CXXFLAGS	+= -funsigned-bitfields -fshort-enums
	CXXFLAGS	+= $(WARN)
	CXXFLAGS	+= -Winline

	LD_FLAGS	= -mcpu=$(MCU)
	LD_FLAGS	+= -mthumb
	LD_FLAGS	+= -nostartfiles 
	LD_FLAGS	+= -g
	LD_FLAGS	+=	-lc
	LD_FLAGS	+=	-lm
	LD_FLAGS	+= -Wl,-Map="$(MAP)"
	LD_FLAGS	+= -Wl,--gc-sections
	LD_FLAGS	+= -T$(LD_SCRIPT)

ifeq ($(USE_LTO),YES)
	CFLAGS		+= -flto
	CXXFLAGS	+= -flto
	LD_FLAGS	+= -flto $(OPTIMIZE)
endif

########       openocd command-line

# reset all hardware by SRST 
	oocd_params_srst	= -c "reset_config srst_only"
	oocd_params_srst	+= -c "adapter_nsrst_assert_width 10"
	oocd_params_srst	+= -c "adapter_nsrst_delay 2"

# debug level (d0..d3)
	oocd_params		= -d0
# interface and board/target settings (using the OOCD target-library here)
#	oocd_params		+= -c "fast enable"
	oocd_params		+= -f interface/jlink.cfg
	oocd_params		+= -f $(COMMON)/lpc1766.cfg
	#oocd_params		+= $(oocd_params_srst)
	oocd_params		+= -c init -c targets

	oocd_params_program	= $(oocd_params)
# commands to prepare flash-write
	oocd_params_program	+= -c "halt"
# flash-write and -verify
	oocd_params_program	+= -c "flash write_image erase $(ELF)"
# openOCD adds CSUM in addresses 0x1C..0x1F for write only, not for verify
# TODO: Insert CSUM into $(EXEDIR)/$(TARGET).bin by srecord 
#	oocd_params_program	+= -c "verify_image $(ELF)"
# reset target
	oocd_params_program	+= -c "reset run"
# terminate OOCD after programming
	oocd_params_program	+= -c shutdown

# just reset 
	oocd_params_reset	= $(oocd_params)
	oocd_params_reset	+= -c "reset run"
	oocd_params_reset	+= -c shutdown

.SILENT :

.PHONY: all start dirs build clean program reset archive

############# targets

all : start dirs $(ELF) $(BIN) $(LSS) $(OK)

build: clean all

start:
	@echo --- building $(TARGET)

$(LSS): $(ELF) makefile
	@echo --- making asm-lst...
#	@$(OBJDUMP) -dStC $(ELF) > $(LSS)
	@$(OBJDUMP) -dC $(ELF) > $(LSS)

$(OK): $(ELF)
	@$(SIZE) $(ELF)
	@echo "Errors: none"

$(ELF):	$(OBJS) makefile
	@echo --- linking...
	$(LD) $(LD_FLAGS) $(OBJS) -o "$(ELF)"

$(HEX): $(ELF)
	@echo --- make hex...
	@$(OBJCOPY) -O ihex $(ELF) $(HEX)

$(BIN): $(ELF)
	@echo --- make binary...
	@$(OBJCOPY) -O binary $(ELF) $(BIN)

program: $(ELF)
	@echo "Programming with OPENOCD"
	$(FLASHER) $(oocd_params_program)

reset:
	@echo Resetting device
	$(FLASHER) $(oocd_params_reset)

VPATH := $(DIRS)

$(OBJDIR)/%.o: %.cpp makefile
	@echo --- compiling $<...
	$(CXX) -c $(CXXFLAGS) -o $@ $<

$(OBJDIR)/%.o: %.c makefile
	@echo --- compiling $<...
	$(CC) -c $(CFLAGS) -o $@ $<

$(OBJDIR)/%.o: %.S makefile
	@echo --- assembling $<...
	$(AS) -c $(AFLAGS) -o $@ $<

dirs: $(OBJDIR) $(EXEDIR) $(LSTDIR) $(BAKDIR)

$(OBJDIR):
	-@$(MD) $(OBJDIR)

$(EXEDIR):
	-@$(MD) $(EXEDIR)

$(LSTDIR):
	-@$(MD) $(LSTDIR)

$(BAKDIR):
	-@$(MD) $(BAKDIR)

clean:
	-@$(RM) $(OBJDIR)/*.d 2>/dev/null
	-@$(RM) $(OBJDIR)/*.o 2>/dev/null
	-@$(RM) $(LSTDIR)/*.lst 2>/dev/null
	-@$(RM) $(ELF)
	-@$(RM) $(HEX)
	-@$(RM) $(LSS)
	-@$(RM) $(MAP)

archive:
	@echo --- archiving...
	7z a $(BAKDIR)/$(TARGET)_`date +%Y-%m-%d,%H-%M-%S` $(ARCFILES)
	@echo --- done!

# dependencies
ifeq (,$(findstring build,$(MAKECMDGOALS)))
 ifeq (,$(findstring clean,$(MAKECMDGOALS)))
  ifeq (,$(findstring dirs,$(MAKECMDGOALS)))
  -include $(wildcard $(OBJDIR)/*.d) 
  endif
 endif
endif