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Makefile
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Makefile
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######################################
# target
######################################
TARGET = usb_audio_i2s
# To build for STM32F411CEU6 versus STM32F401CCU6
# set ASM_SOURCES, CPU_DEF and LDSCRIPT below
# STM32F411CEU6 Black Pill (512kB flash, 256kB RAM, 100MHz)
#CPU_DEF = STM32F411xE
#ASM_SOURCES = startup_stm32f411ceux.s
#LDSCRIPT = STM32F411CEUX_FLASH.ld
# STM32F401CCU6 Black Pill (256kB flash, 64kB RAM, 84MHz)
CPU_DEF = STM32F401xC
ASM_SOURCES = startup_stm32f401ccux.s
LDSCRIPT = STM32F401CCUX_FLASH.ld
######################################
# building variables
######################################
# debug build?
DEBUG = 0
# optimization
OPT = -O2
#######################################
# paths
#######################################
# Build path
BUILD_DIR = build
######################################
# source
######################################
# C sources
C_SOURCES = \
src/main.c \
src/usart.c \
src/usbd_conf.c \
src/usbd_desc.c \
src/usbd_audio_if.c \
src/stm32f4xx_it.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pcd.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pcd_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_usb.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2s.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2s_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_tim.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_tim_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rcc.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rcc_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash_ramfunc.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_gpio.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cortex.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal.c \
drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_exti.c \
drivers/BSP/bsp_misc.c \
drivers/BSP/bsp_audio.c \
src/system_stm32f4xx.c \
stm32_usb/Core/Src/usbd_core.c \
stm32_usb/Core/Src/usbd_ctlreq.c \
stm32_usb/Core/Src/usbd_ioreq.c \
stm32_usb/Class/AUDIO/Src/usbd_audio.c
#######################################
# binaries
#######################################
PREFIX = arm-none-eabi-
# The gcc compiler bin path can be either defined in make command via GCC_PATH variable (> make GCC_PATH=xxx)
# either it can be added to the PATH environment variable.
ifdef GCC_PATH
CC = $(GCC_PATH)/$(PREFIX)gcc
AS = $(GCC_PATH)/$(PREFIX)gcc -x assembler-with-cpp
CP = $(GCC_PATH)/$(PREFIX)objcopy
SZ = $(GCC_PATH)/$(PREFIX)size
else
CC = $(PREFIX)gcc
AS = $(PREFIX)gcc -x assembler-with-cpp
CP = $(PREFIX)objcopy
SZ = $(PREFIX)size
endif
HEX = $(CP) -O ihex
BIN = $(CP) -O binary -S
#######################################
# CFLAGS
#######################################
# cpu
CPU = -mcpu=cortex-m4
# fpu
FPU = -mfpu=fpv4-sp-d16
# float-abi
FLOAT-ABI = -mfloat-abi=hard
# mcu
MCU = $(CPU) -mthumb $(FPU) $(FLOAT-ABI)
# macros for gcc
# AS defines
AS_DEFS =
# C defines
C_DEFS = \
-DUSE_HAL_DRIVER \
-DUSE_FULL_ASSERT \
-D$(CPU_DEF) \
-DDEBUG_FEEDBACK_ENDPOINT
#-DUSE_MCLK_OUT
# Reference manual F411 RM0383 page 585, when MCLK output is enabled, MCLK = 256 x Fs
# AS includes
AS_INCLUDES =
# C includes
C_INCLUDES = \
-Iinc \
-Idrivers/STM32F4xx_HAL_Driver/Inc \
-Idrivers/STM32F4xx_HAL_Driver/Inc/Legacy \
-Istm32_usb/Core/Inc \
-Istm32_usb/Class/AUDIO/Inc \
-Idrivers/CMSIS/Device/ST/STM32F4xx/Include \
-Idrivers/CMSIS/Include \
-Idrivers/BSP
# compile gcc flags
ASFLAGS = $(MCU) $(AS_DEFS) $(AS_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections
CFLAGS = $(MCU) $(C_DEFS) $(C_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections
ifeq ($(DEBUG), 1)
CFLAGS += -g -gdwarf-2
endif
# Generate dependency information
CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
#######################################
# LDFLAGS
#######################################
# libraries
LIBS = -lc -lm -lnosys
LIBDIR =
LDFLAGS = $(MCU) -specs=nano.specs -u _printf_float -T$(LDSCRIPT) $(LIBDIR) $(LIBS) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map,--cref -Wl,--gc-sections
# default action: build all
all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin
#######################################
# build the application
#######################################
# list of objects
OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
vpath %.c $(sort $(dir $(C_SOURCES)))
# list of ASM program objects
OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
vpath %.s $(sort $(dir $(ASM_SOURCES)))
$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
$(AS) -c $(CFLAGS) $< -o $@
$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
$(CC) $(OBJECTS) $(LDFLAGS) -o $@
$(SZ) $@
$(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
$(HEX) $< $@
$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
$(BIN) $< $@
$(BUILD_DIR):
mkdir $@
#######################################
# clean up
#######################################
clean:
-rm -fR $(BUILD_DIR)
#######################################
# Flash binary
#######################################
flash:
-st-flash --reset write $(BUILD_DIR)/$(TARGET).bin 0x08000000
#######################################
# dependencies
#######################################
-include $(wildcard $(BUILD_DIR)/*.d)
# *** EOF ***