# -*- mode: makefile -*-
.PHONY: all clean

CC3100_DRV_SRCS = driver.c device.c nonos.c socket.c netapp.c wlan.c

CC3100_PLATFORM_SRCS = spi.c board.c cli_uart.c stm32f4xx_it.c system_stm32f4xx.c stm32f4xx_hal_msp.c

STM32F4_SRCS = stm32f4xx_hal_spi.c stm32f4xx_hal_gpio.c stm32f4xx_hal_cortex.c\
               stm32f4xx_hal.c stm32f4xx_hal_rcc.c stm32f4xx_hal_dma.c \
               stm32f4xx_hal_pwr_ex.c stm32f4_discovery.c stm32f4xx_hal_i2c.c \
               stm32f4xx_hal_uart.c stm32f4xx_hal_tim.c \
               stm32f4xx_hal_tim_ex.c stm32f4xx_hal_rtc_ex.c stm32f4xx_hal_rtc.c

SRCS = main.c mongoose.c startup_utils.c ${CC3100_DRV_SRCS} ${CC3100_PLATFORM_SRCS} ${STM32F4_SRCS}

REPO_ROOT=./../../
CC3100_SDKROOT=/opt/CC3100SDK_1.2.0/cc3100-sdk
STM32CUBEF4_ROOT=/opt/STM32CubeF4
STM32CUBEF4_DRV_PATH=${STM32CUBEF4_ROOT}/Drivers

CC = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy

FP_FLAGS = -mfloat-abi=hard -mfpu=fpv4-sp-d16
ARCH_FLAGS = -mthumb -mcpu=cortex-m4

BUILD_DIR=.build
OUT_DIR=out
PROJECT=example
BOARD=STM32F429xx
STARTUP_SCRIPT=startup_stm32f429xx.s

INCDIRS = $(addprefix -I,$(IPATH))

OBJS = $(addprefix $(BUILD_DIR)/,$(patsubst %.c,%.o,$(SRCS)) $(patsubst %.s,%.o,$(STARTUP_SCRIPT)))

VPATH = ${CC3100_SDKROOT}/simplelink/source\
        ${CC3100_SDKROOT}/platform/stm32discovery\
        ${STM32CUBEF4_ROOT}/Drivers/STM32F4xx_HAL_Driver/Src\
        ${STM32CUBEF4_ROOT}/Drivers/BSP/STM32F4-Discovery\
        ${REPO_ROOT}

# CC3100 SDK and STM32 SDK include headers w/out path, just like
# #include "simplelink.h". As result, we have to add all required directories
# into IPATH

IPATH = . ${CC3100_SDKROOT}/simplelink/include\
        ${CC3100_SDKROOT}/platform/stm32discovery\
        ${STM32CUBEF4_DRV_PATH}/BSP/STM32F4-Discovery\
        ${STM32CUBEF4_DRV_PATH}/STM32F4xx_HAL_Driver/Inc\
        ${STM32CUBEF4_DRV_PATH}/CMSIS/Include\
        ${STM32CUBEF4_DRV_PATH}/CMSIS/Device/ST/STM32F4xx/Include

LDFLAGS	= --static -nostartfiles
LDLIBS = -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
LDSCRIPT = stm32f429xx.ld

INCDIRS = $(addprefix -I,$(IPATH))

CFLAGS = ${FP_FLAGS} ${ARCH_FLAGS} ${INCDIRS}\
         -D${BOARD} -DEXT_LIB_REGISTERED_GENERAL_EVENTS \
         -DSL_FULL\
         -DCS_PLATFORM=6 \
         -D__STM32F407xx_H \
         -DMG_SIMPLELINK_NO_OSI \
         -DMG_ENABLE_MQTT \
         -g -fno-common -ffunction-sections -fdata-sections \

ELF = ${BUILD_DIR}/${PROJECT}.elf
BIN = ${OUT_DIR}/${PROJECT}.bin

all: ${BUILD_DIR} ${OUT_DIR} ${OBJS} ${ELF} ${BIN}

${BUILD_DIR}:
	mkdir -p $@

${OUT_DIR}:
	mkdir -p $@

$(BUILD_DIR)/%.o: %.c
	$(CC) ${CFLAGS} $^ -c -o $@

$(BUILD_DIR)/%.o: %.s
	$(CC) ${CFLAGS} $^ -c -o $@

${ELF}: ${OBJS}
	$(CC) ${ARCH_FLAGS} ${FP_FLAGS} $(LDFLAGS) $(OBJS) $(LDLIBS) -T$(LDSCRIPT) -o $@

${BIN}: ${ELF}
	$(OBJCOPY) -Obinary $^ $@

clean:
	rm -rf ${BUILD_DIR} ${OUT_DIR}