BUILD_BASE  = build
FW_DIR      = firmware

TARGET = app

STARTUP = startup_stm32f10x_ld_vl.S

TARGET_OUT = $(addprefix $(BUILD_BASE)/,$(TARGET).elf)
FW_OUT = $(addprefix $(FW_DIR)/,$(TARGET).hex)

STLINK_FLASH = "C:\Program Files (x86)\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-LINK_CLI.exe"
STLINK_FLAGS = -c SWD -p $(FW_OUT) -Rst -Run

MODULES   = user SPL SPL/src SPL/inc CoreSupport
SRC_DIR   = $(MODULES)
BUILD_DIR = $(addprefix build/,$(MODULES))

SRC       = $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.c))
OBJ       = $(patsubst %.c,build/%.o,$(SRC))
INCLUDES  = $(addprefix -I ,$(SRC_DIR))

LD_SCRIPT   = stm32f103c8_flash.ld
LDFLAGS = -T$(LD_SCRIPT) -Wl,--gc-sections,-Map=$@.map,-cref,-u,Reset_Handler $(INCLUDES)

CFLAGS  =   -specs=nano.specs -ffunction-sections -fdata-sections -mcpu=cortex-m3 -mthumb -Wall -g -O2 \
            -fomit-frame-pointer -fverbose-asm -mfloat-abi=soft -D__STACK_SIZE=0x0100 -D__HEAP_SIZE=0x0000 \
            -DSTM32F103C8 -DSTM32F10X_MD -DUSE_STDPERIPH_DRIVER -DRUN_FROM_FLASH=1

ASFLAGS = -Wa,-adhlns=$@.lst -c -fmessage-length=0 -mcpu=cortex-m3 -mfloat-abi=soft

OBJCPFLAGS = -O ihex
OBJSIZEFLAGS = --format=berkeley

CC=arm-none-eabi-gcc.exe
LD=arm-none-eabi-gcc.exe
AR=arm-none-eabi-ar.exe
AS=arm-none-eabi-as.exe
OBJCP=arm-none-eabi-objcopy.exe
OBJDP=arm-none-eabi-objdump.exe
OBJSIZE=arm-none-eabi-size.exe

V ?= $(VERBOSE)
ifeq ("$(V)","1")
Q :=
vecho := @true
else
Q := @
vecho := @echo
endif

vpath %.c $(SRC_DIR)

define compile-objects
build/%.o: %.c
    $(vecho) $(CC) $(INCLUDES) $(CFLAGS)  -c $$< -o $$@
    $(Q) $(CC) $(INCLUDES) $(CFLAGS)  -c $$< -o $$@
endef

.PHONY: all checkdirs clean flash

all: checkdirs $(TARGET_OUT) $(FW_OUT)

checkdirs: $(BUILD_DIR) $(FW_DIR)

$(TARGET_OUT):$(OBJ)
    $(vecho) $(LD) $(LDFLAGS) $(OBJ) -o $@
    $(Q) $(LD) $(LDFLAGS) $(OBJ) -o $@

$(FW_OUT):$(TARGET_OUT)
    $(OBJCP) $(OBJCPFLAGS) $< $@
    $(OBJSIZE) $(OBJSIZEFLAGS) $< $@

$(BUILD_DIR):
    $(Q) md $(subst /,\,$@)

$(FW_DIR):
    $(Q) md $(subst /,\,$@)

$(foreach bdir,$(BUILD_DIR),$(eval $(call compile-objects,$(bdir))))

flash: all
    $(STLINK_FLASH) $(STLINK_FLAGS)

clean:
    $(Q) rm -rf $(BUILD_DIR)
    $(Q) rm -rf $(BUILD_BASE)
    $(Q) rm -rf $(FW_DIR)