About

This project is used to develop applications for the STM32 - ST's ARM Cortex-M3(4) MCUs. It uses cmake and GCC, along with newlib (libc), STM32CubeMX or ChibiOS.

Requirements

• cmake >= 2.8
• GCC toolchain with newlib (optional).
• STM32CubeMX package for STM32F1, STM32F2 or STM32F4 families.

Project contains

• CMake common toolchain file, that configures cmake to use the arm toolchain.
• CMake toolchain file that can generate a tunable linker script
• CMake STM32 family-specific toolchain file, that configures family-specific parameters.
• CMake modules to find and configure CMSIS and STM32HAL components.
• CMake modules to find and configure ChibiOS components.
• CMake project template.

Examples

• stm32-blinky - blink LED using timers and PWM.
• stm32-newlib - show date using uart and libc functions from newlib.
• stm32-chibios - blink led using ChibiOS/NIL.

Usage

First of all you need to configure toolchain and libraries, you can do this by editing gcc_stm32.cmake or, preferably, by passing it through the command line.

Configuration

• TOOLCHAIN_PREFIX - where toolchain is located, default: /usr
• TARGET_TRIPLET - toolchain target triplet, default: arm-none-eabi
• STM32_CHIP - STM32 device code, e.g. STM32F407VG or STM32F103VG
• STM32_FAMILY - STM32 family (F0, F1, F4, etc.) currently, F1, F2 and F4 family are supported. Note: If STM32_CHIP variable is set, STM32_FAMILY is optional.
• STM32Cube_DIR - path to STM32CubeMX directory default: /opt/STM32Cube_FW_F1_V1.1.0 /opt/STM32Cube_FW_F2_V1.1.0 /opt/STM32Cube_FW_F4_V1.6.0

To use the toolchain, you'll need to copy contents of the cmake folder into cmake's modules path, or use the CMAKE_MODULE_PATH variable.

Common usage

cmake -DSTM32_CHIP=<chip> -DCMAKE_TOOLCHAIN_FILE=<path_to_gcc_stm32.cmake> -DCMAKE_BUILD_TYPE=Debug <path_to_source_dir>

Where <chip> is the STM32 chip name (e.g. STM32F100C8, STM32F407IG).

This command will generate Makefile for project. For a Release build, change CMAKE_BUILD_TYPE.

The script will try to detect chip parameters automatically from the chip name (type, flash/ram size), or, you can set these directly with these variables:

• STM32_CHIP_TYPE - family-dependent chip type. Global variable STM32_CHIP_TYPES contains list of valid types for current family (e.g 207xG)
• STM32_FLASH_SIZE - chip flash size (e.g. 64K)
• STM32_RAM_SIZE - chip RAM size (e.g. 4K)

Usage with Eclipse CDT:

cmake -DSTM32_CHIP=<chip> -DCMAKE_TOOLCHAIN_FILE=<path_to_gcc_stm32.cmake> -DCMAKE_BUILD_TYPE=Debug -G "Eclipse CDT4 - Unix Makefiles" <path_to_source_dir>

Building

• To build elf file: make
• To build .hex: make <project name>.hex
• To build .bin: make <project name>.bin

Linker script & variables

You can use cmake variables below to tune the generated linker. To specify a custom linker script, set STM32_LINKER_SCRIPT (you can still use these variables in your custom script).

• STM32_FLASH_ORIGIN - Start address of flash (default: 0x08000000)
• STM32_RAM_ORIGIN - Start address of RAM (default: 0x20000000)
• STM32_FLASH_SIZE - Flash size (default: from chip name)
• STM32_RAM_SIZE - RAM size (default: from chip name)
• STM32_MIN_STACK_SIZE - Minimum stack size for error detection at link-time (default: 512 bytes)
• STM32_MIN_HEAP_SIZE - Minimum heap size for error detection at link-time (default: 0 bytes)
• STM32_CCRAM_ORIGIN - Start address of Core-Coupled RAM (only for F4 family) (default: 0x10000000)
• STM32_CCRAM_SIZE - Core-Coupled RAM size (only for F4 family) (default: 64 KiB)

Useful cmake macros

• STM32_GET_CHIP_TYPE(CHIP CHIP_TYPE) - gets chip type from chip name.
• STM32_GET_CHIP_PARAMETERS(CHIP FLASH_SIZE RAM_SIZE) - gets chip ram/flash size from chip name.
• STM32_SET_FLASH_PARAMS(TARGET ...) - sets chip flash/ram parameters for target.
• STM32_SET_CHIP_DEFINITIONS(TARGET CHIP_TYPE) - sets chip family and type-specific compiler flags for target.
• STM32_SET_TARGET_PROPERTIES(TARGET) - sets all needed parameters and compiler flags for target.
• STM32_GENERATE_LIBRARIES(NAME SOURCES LIBRARIES) - generates libraries for all chip types in family. Resulting libraries stored in LIBRARIES and have names in ${NAME}${FAMILY}${CHIP_TYPE} format.

ChibiOS Support

This project also supports ChibiOS v3.x.x (both nil and rt kernels).

CMake modules for ChibiOS can find specified ChibiOS components using the COMPONENTS directive.

See project stm32-chibios for example usage.