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Makefile
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Makefile
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##########################################################################################################################
# Top level Makefile based on GCC for FreeRTOS build on STM32F4 based board.
# Copyright (C) 2020-2021
#
# Author: DigitallyAmar (@digitallyamar)
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
# ------------------------------------------------
# Generic Makefile (based on gcc)
#
# ChangeLog :
# 2020-10-28 - first version
# ------------------------------------------------
##########################################################################################################################
######################################
# target
######################################
TARGET = STM32_BareMetal
######################################
# building variables
######################################
# Select debug or retail build
DEBUG = 1
# optimization
OPT = -Og
#######################################
# paths
#######################################
# source path
SOURCES_DIR = \
# Build path
BUILD_DIR = build
######################################
# source
######################################
# C sources
C_SOURCES = \
src/main.c
# ASM sources
ASM_SOURCES = \
src/startup.s
#######################################
# binaries
#######################################
BINPATH = ~/tools/gcc-arm-none-eabi-6-2017-q2-update/bin
PREFIX = arm-none-eabi-
AS = $(BINPATH)/$(PREFIX)gcc -x assembler-with-cpp
CC = $(BINPATH)/$(PREFIX)gcc
CP = $(BINPATH)/$(PREFIX)objcopy
AR = $(BINPATH)/$(PREFIX)ar
SZ = $(BINPATH)/$(PREFIX)size
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 =
# AS includes
AS_INCLUDES =
# C includes
C_INCLUDES =
# 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"$(@:%.o=%.d)" -MT"$(@:%.o=%.d)"
#######################################
# LDFLAGS
#######################################
# link script
LDSCRIPT = STM32F407VET_FLASH.ld
# libraries
LIBS = -lc -lm -lnosys
LIBDIR =
LDFLAGS = $(MCU) -specs=nano.specs -T$(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)
$(info ************ Building C Files ************)
$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
$(info ************ Building AS Files ************)
$(AS) -c $(CFLAGS) $< -o $@
$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
$(info ************ Link objects & build ELF Files ************)
$(CC) $(OBJECTS) $(LDFLAGS) -o $@
$(info ************ Calling SZ ************)
$(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 -rf .dep $(BUILD_DIR)