PROJECT_NAME := project_name

export OUTPUT_FILENAME

MAKEFILE_NAME := $(MAKEFILE_LIST)
MAKEFILE_DIR := $(dir $(MAKEFILE_NAME) ) 


#############################################################################################
#                                       USER CONFIGS                                        #
#############################################################################################

#SDK
BASE_SDK_PATH := ../nrf51-IoT-SDK/

#Source path
SOURCE_PATH := ../src/

#GNU ARM toolchain
GNU_INSTALL_ROOT := $(BASE_SDK_PATH)../gcc-arm-toolchain
GNU_VERSION := 4.8.3
GNU_PREFIX := arm-none-eabi

#############################################################################################
#                                       /USER CONFIGS                                       #
#############################################################################################

TEMPLATE_PATH = $(BASE_SDK_PATH)components/toolchain/gcc

MK := mkdir
RM := rm -rf

#echo suspend
ifeq ("$(VERBOSE)","1")
NO_ECHO := 
else
NO_ECHO := @
endif

# Toolchain commands
CC       		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-gcc"
AS       		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-as"
AR       		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-ar" -r
LD       		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-ld"
NM       		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-nm"
OBJDUMP  		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-objdump"
OBJCOPY  		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-objcopy"
SIZE    		:= "$(GNU_INSTALL_ROOT)/bin/$(GNU_PREFIX)-size"

#function for removing duplicates in a list
remduplicates = $(strip $(if $1,$(firstword $1) $(call remduplicates,$(filter-out $(firstword $1),$1))))

#############################################################################################
#                                  Place Source Files Here                                  #
#############################################################################################

#recursive wildcard function
rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))

#adds all c files in SOURCE_PATH as source files recursivelly
C_SOURCE_FILES += $(call rwildcard, $(SOURCE_PATH), *.c)

#############################################################################################
#                                 /Place Source Files Here                                  #
#############################################################################################

#source common to all targets
C_SOURCE_FILES += \
$(BASE_SDK_PATH)components/iot/context_manager/iot_context_manager.c \
$(BASE_SDK_PATH)components/libraries/button/app_button.c \
$(BASE_SDK_PATH)components/libraries/timer/app_timer.c \
$(BASE_SDK_PATH)components/libraries/util/app_error.c \
$(BASE_SDK_PATH)components/libraries/gpiote/app_gpiote.c \
$(BASE_SDK_PATH)components/libraries/trace/app_trace.c \
$(BASE_SDK_PATH)components/libraries/mem_manager/mem_manager.c \
$(BASE_SDK_PATH)components/libraries/scheduler/app_scheduler.c \
$(BASE_SDK_PATH)components/libraries/util/nrf_assert.c \
$(BASE_SDK_PATH)components/softdevice/common/softdevice_handler/softdevice_handler.c \
$(BASE_SDK_PATH)components/drivers_nrf/simple_uart/simple_uart.c \
$(BASE_SDK_PATH)components/drivers_nrf/hal/nrf_delay.c \
$(BASE_SDK_PATH)external/lwip/src/port/nrf_platform_port.c \
$(BASE_SDK_PATH)components/toolchain/system_nrf51.c \
$(BASE_SDK_PATH)components/ble/common/ble_conn_params.c \
$(BASE_SDK_PATH)components/ble/common/ble_advdata.c \
$(BASE_SDK_PATH)components/ble/common/ble_srv_common.c \

#assembly files common to all targets
ASM_SOURCE_FILES  = $(BASE_SDK_PATH)components/toolchain/gcc/gcc_startup_nrf51.s

#assembly files common to all targets
LIBS  = $(BASE_SDK_PATH)components/ble/ble_6lowpan/lib/ble_6lowpan.a
LIBS += $(BASE_SDK_PATH)external/lwip/lib/liblwip.a

#includes common to all targets
INC_PATHS  = -I$(BASE_SDK_PATH)components/toolchain/gcc
INC_PATHS += -I$(BASE_SDK_PATH)components/toolchain
INC_PATHS += -I$(BASE_SDK_PATH)/examples/bsp
INC_PATHS += -I$(SOURCE_PATH)
INC_PATHS += -I$(BASE_SDK_PATH)components/softdevice/s1xx_iot/headers
INC_PATHS += -I$(BASE_SDK_PATH)components/ble/common
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/button
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/include
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/include/ipv4
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/include/ipv6
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/include/netif
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/port
INC_PATHS += -I$(BASE_SDK_PATH)external/lwip/src/port/arch
INC_PATHS += -I$(BASE_SDK_PATH)components/ble/ble_6lowpan
INC_PATHS += -I$(BASE_SDK_PATH)components/iot/include
INC_PATHS += -I$(BASE_SDK_PATH)components/ble/ble_services/ble_ipsp
INC_PATHS += -I$(BASE_SDK_PATH)components/softdevice/common/softdevice_handler
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/timer
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/gpiote
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/trace
INC_PATHS += -I$(BASE_SDK_PATH)components/drivers_nrf/simple_uart
INC_PATHS += -I$(BASE_SDK_PATH)components/drivers_nrf/hal
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/mem_manager
INC_PATHS += -I$(BASE_SDK_PATH)components/iot/context_manager
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/scheduler
INC_PATHS += -I$(BASE_SDK_PATH)components/libraries/util

OBJECT_DIRECTORY = _build
LISTING_DIRECTORY = $(OBJECT_DIRECTORY)
OUTPUT_BINARY_DIRECTORY = $(OBJECT_DIRECTORY)

# Sorting removes duplicates
BUILD_DIRECTORIES := $(sort $(OBJECT_DIRECTORY) $(OUTPUT_BINARY_DIRECTORY) $(LISTING_DIRECTORY) )

#flags common to all targets
CFLAGS  = -DNRF51
CFLAGS += -DBOARD_PCA10001
CFLAGS += -DBLE_STACK_SUPPORT_REQD
CFLAGS += -DS110
CFLAGS += -D__HEAP_SIZE=512
CFLAGS += -DSOFTDEVICE_PRESENT
CFLAGS += -mcpu=cortex-m0
CFLAGS += -mthumb -mabi=aapcs --std=gnu99
CFLAGS += -Wall -Werror -O3
CFLAGS += -mfloat-abi=soft
# keep every function in separate section. This will allow linker to dump unused functions
CFLAGS += -ffunction-sections -fdata-sections -fno-strict-aliasing
CFLAGS += -flto -fno-builtin

# keep every function in separate section. This will allow linker to dump unused functions
LDFLAGS += -Xlinker -Map=$(LISTING_DIRECTORY)/$(OUTPUT_FILENAME).map
LDFLAGS += -mthumb -mabi=aapcs -L $(TEMPLATE_PATH) -T$(LINKER_SCRIPT)
LDFLAGS += -mcpu=cortex-m0
# let linker to dump unused sections
LDFLAGS += -Wl,--gc-sections
# use newlib in nano version
LDFLAGS += --specs=nano.specs -lc -lnosys

# Assembler flags
ASMFLAGS += -x assembler-with-cpp
ASMFLAGS += -DNRF51
ASMFLAGS += -DBOARD_PCA10001
ASMFLAGS += -DBLE_STACK_SUPPORT_REQD
ASMFLAGS += -DS110
ASMFLAGS += -D__HEAP_SIZE=512
ASMFLAGS += -DSOFTDEVICE_PRESENT
#default target - first one defined
default: clean nrf51822_xxaa_s1xx_iot

#building all targets
all: clean
	$(NO_ECHO)$(MAKE) -f $(MAKEFILE_NAME) -C $(MAKEFILE_DIR) -e cleanobj
	$(NO_ECHO)$(MAKE) -f $(MAKEFILE_NAME) -C $(MAKEFILE_DIR) -e nrf51822_xxaa_s1xx_iot 

#target for printing all targets
help:
	@echo following targets are available:
	@echo 	nrf51822_xxaa_s1xx_iot


C_SOURCE_FILE_NAMES = $(notdir $(C_SOURCE_FILES))
C_PATHS = $(call remduplicates, $(dir $(C_SOURCE_FILES) ) )
C_OBJECTS = $(addprefix $(OBJECT_DIRECTORY)/, $(C_SOURCE_FILE_NAMES:.c=.o) )

ASM_SOURCE_FILE_NAMES = $(notdir $(ASM_SOURCE_FILES))
ASM_PATHS = $(call remduplicates, $(dir $(ASM_SOURCE_FILES) ))
ASM_OBJECTS = $(addprefix $(OBJECT_DIRECTORY)/, $(ASM_SOURCE_FILE_NAMES:.s=.o) )

vpath %.c $(C_PATHS)
vpath %.s $(ASM_PATHS)

OBJECTS = $(C_OBJECTS) $(ASM_OBJECTS)

nrf51822_xxaa_s1xx_iot: OUTPUT_FILENAME := nrf51822_xxaa_s1xx_iot
nrf51822_xxaa_s1xx_iot: LINKER_SCRIPT=$(BASE_SDK_PATH)components/toolchain/gcc/gcc_nrf51_s1xx_iot_xxaa.ld
nrf51822_xxaa_s1xx_iot: $(BUILD_DIRECTORIES) $(OBJECTS)
	@echo Linking target: $(OUTPUT_FILENAME).out
	$(NO_ECHO)$(CC) $(LDFLAGS) $(OBJECTS) $(LIBS) -o $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out
	$(NO_ECHO)$(MAKE) -f $(MAKEFILE_NAME) -C $(MAKEFILE_DIR) -e finalize

## Create build directories
$(BUILD_DIRECTORIES):
	echo $(MAKEFILE_NAME)
	$(MK) $@

# Create objects from C SRC files
$(OBJECT_DIRECTORY)/%.o: %.c
	@echo Compiling file: $(notdir $<)
	$(NO_ECHO)$(CC) $(CFLAGS) $(INC_PATHS) -c -o $@ $<

# Assemble files
$(OBJECT_DIRECTORY)/%.o: %.s
	@echo Compiling file: $(notdir $<)
	$(NO_ECHO)$(CC) $(ASMFLAGS) $(INC_PATHS) -c -o $@ $<


# Link
$(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out: $(BUILD_DIRECTORIES) $(OBJECTS)
	@echo Linking target: $(OUTPUT_FILENAME).out
	$(NO_ECHO)$(CC) $(LDFLAGS) $(OBJECTS) $(LIBS) -o $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out


## Create binary .bin file from the .out file
$(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).bin: $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out
	@echo Preparing: $(OUTPUT_FILENAME).bin
	$(NO_ECHO)$(OBJCOPY) -O binary $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).bin

## Create binary .hex file from the .out file
$(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).hex: $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out
	@echo Preparing: $(OUTPUT_FILENAME).hex
	$(NO_ECHO)$(OBJCOPY) -O ihex $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).hex

finalize: genbin genhex echosize

genbin:
	@echo Preparing: $(OUTPUT_FILENAME).bin
	$(NO_ECHO)$(OBJCOPY) -O binary $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).bin

## Create binary .hex file from the .out file
genhex: 
	@echo Preparing: $(OUTPUT_FILENAME).hex
	$(NO_ECHO)$(OBJCOPY) -O ihex $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).hex

echosize:
	-@echo ""
	$(NO_ECHO)$(SIZE) $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out
	-@echo ""

clean:
	$(RM) $(BUILD_DIRECTORIES)

cleanobj:
	$(RM) $(BUILD_DIRECTORIES)/*.o

flash: $(MAKECMDGOALS)
	@echo Flashing: $(OUTPUT_BINARY_DIRECTORY)/$<.hex
	nrfjprog --reset --program $(OUTPUT_BINARY_DIRECTORY)/$<.hex