CPU = cortex-m4
CROSS_COMPILE ?= arm-none-eabi-

NRF_PATH := nrf5sdk/
INCLUDES += $(NRF_PATH)components/
INCLUDES += $(NRF_PATH)modules/nrfx/mdk/
INCLUDES += $(NRF_PATH)components/libraries/strerror/
INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/nrf52/
INCLUDES += $(NRF_PATH)components/toolchain/cmsis/include/
INCLUDES += $(NRF_PATH)components/libraries/util/
INCLUDES += $(NRF_PATH)components/libraries/balloc/
INCLUDES += $(NRF_PATH)components/libraries/ringbuf/
INCLUDES += $(NRF_PATH)modules/nrfx/hal/
INCLUDES += $(NRF_PATH)components/libraries/bsp/
INCLUDES += $(NRF_PATH)components/libraries/log/
INCLUDES += $(NRF_PATH)modules/nrfx/
INCLUDES += $(NRF_PATH)components/libraries/experimental_section_vars/
INCLUDES += $(NRF_PATH)components/softdevice/s132/headers/
INCLUDES += $(NRF_PATH)components/libraries/delay/
INCLUDES += $(NRF_PATH)integration/nrfx/
INCLUDES += $(NRF_PATH)components/libraries/atomic/
INCLUDES += $(NRF_PATH)components/boards/
INCLUDES += $(NRF_PATH)components/libraries/memobj/
INCLUDES += $(NRF_PATH)components/softdevice/common/
INCLUDES += $(NRF_PATH)external/fprintf/
INCLUDES += $(NRF_PATH)components/libraries/log/src/

NRF_C_SRCS += $(NRF_PATH)components/boards/boards.c
NRF_C_SRCS += $(NRF_PATH)modules/nrfx/mdk/system_nrf52.c
NRF_C_OBJS = $(patsubst $(NRF_PATH)%,$(OBJ_DIR)/%,$(patsubst %.c,%.o,$(NRF_C_SRCS)))

NRF_A_SRCS = $(NRF_PATH)modules/nrfx/mdk/gcc_startup_nrf52.S
NRF_A_OBJS = $(patsubst $(NRF_PATH)%,$(OBJ_DIR)/%,$(patsubst %.S,%.o,$(NRF_A_SRCS)))

C_FLAGS += -DBOARD_PCA10040
C_FLAGS += -DBSP_DEFINES_ONLY
C_FLAGS += -DCONFIG_GPIO_AS_PINRESET
C_FLAGS += -DFLOAT_ABI_HARD
C_FLAGS += -DNRF52
C_FLAGS += -DNRF52832_XXAA
C_FLAGS += -DNRF52_PAN_74
C_FLAGS += -DNRF_SD_BLE_API_VERSION=7
C_FLAGS += -DS132
C_FLAGS += -DSOFTDEVICE_PRESENT
C_FLAGS += -mcpu=$(CPU)
C_FLAGS += -mthumb -mabi=aapcs
C_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
C_FLAGS += -fno-builtin -fshort-enums
C_FLAGS += -D__HEAP_SIZE=8192
C_FLAGS += -D__HEAP_SIZE=8192

# Assembler flags common to all targets
A_FLAGS += -g$(OPT)
A_FLAGS += -mcpu=$(CPU)
A_FLAGS += -mthumb -mabi=aapcs
A_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
A_FLAGS += -DBOARD_PCA10040
A_FLAGS += -DBSP_DEFINES_ONLY
A_FLAGS += -DCONFIG_GPIO_AS_PINRESET
A_FLAGS += -DFLOAT_ABI_HARD
A_FLAGS += -DNRF52
A_FLAGS += -DNRF52832_XXAA
A_FLAGS += -DNRF52_PAN_74
A_FLAGS += -DNRF_SD_BLE_API_VERSION=7
A_FLAGS += -DS132
A_FLAGS += -DSOFTDEVICE_PRESENT
A_FLAGS += -D__HEAP_SIZE=8192
A_FLAGS += -D__HEAP_SIZE=8192

LINKER_SCRIPT = blinky_gcc_nrf52.ld
# Linker flags
LD_FLAGS += -O$(OPT) -g$(OPT)
LD_FLAGS += -mthumb -mabi=aapcs -L$(NRF_PATH)modules/nrfx/mdk -T$(LINKER_SCRIPT)
LD_FLAGS += -mcpu=$(CPU)
LD_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
LD_FLAGS += -Wl,--gc-sections
LD_FLAGS += --specs=nano.specs

.PHONY: package flash flash_softdevice erase

package: $(TARGET_HEX) $(THIS_MAKEFILE)
	nrfutil pkg generate --hw-version 52 --application-version 1 --application $(TARGET_HEX) --sd-req 0xCB --sd-id 0xCB --key-file keys/private.key $(TARGET_PACKAGE)

flash: $(TARGET_HEX) $(THIS_MAKEFILE)
	@echo Flashing: $(TARGET_HEX)
	nrfjprog -f nrf52 --program $(TARGET_HEX) --sectorerase
	nrfjprog -f nrf52 --reset

flash_softdevice:
	@echo Flashing: $(NRF_PATH)/components/softdevice/s132/hex/s132_nrf52_7.0.1_softdevice.hex
	nrfjprog -f nrf52 --program $(NRF_PATH)/components/softdevice/s132/hex/s132_nrf52_7.0.1_softdevice.hex --sectorerase
	nrfjprog -f nrf52 --reset

erase:
	nrfjprog -f nrf52 --eraseall

$(OBJ_DIR)/%.d: $(NRF_PATH)/%.S
	@mkdir -p $(dir $@)
	$(CPP) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(C_FLAGS) $(CPP_FLAGS) $(patsubst $(OBJ_DIR)/%.d,$(NRF_PATH)/%.S,$@)

$(OBJ_DIR)/%.o: $(NRF_PATH)/%.c
	@mkdir -p $(dir $@)
	$(CC) -std=c99 -MP -MD -c -o $@ $< $(C_FLAGS) $(CPP_FLAGS)

$(OBJ_DIR)/%.o: $(NRF_PATH)/%.S
	@mkdir -p $(dir $@)
	$(CC) -c $(ASMFLAGS) $< -o $@