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Preface

We use STM32CubeMX because it’s very easy to use and provides HAL and startup code.
If you do not use an STM32 or want to use STM32CubeMX just skip the Create a Project stage and write your own startup code.

Prerequisites

  • CLion 2022.2.3
  • Stm32CubeMX 6.6.1
  • CMake 3.24.2
  • IAR Embedded Workbench for ARM 9.30.1 (with license)
  • STM32F3-Discovery
  • OpenOCD

Create a Project

Start Stm32CubeMX, open board selector, STM32F3-Discovery, and create the project. Important changes:

Pin Modes

Project Settings

Code Generator Settings

Then generate the project.

Clion Toolchains Settings

Clion Settings Toolchains

  1. In CLion, navigate to Settings | Build, Execution, Deployment | Toolchains
    On Windows, create a new MinGW toolchain or select an existing one. Use bundled MinGW and CMake or configure the path to your installation.

  2. Select the debugger: you can use the bundled GDB or a custom GDB version, for example, the debugger from GNU ARM Embedded Toolchain.

CLion CMake Settings

  1. Open the project in CLion (ignore CMake errors).
  2. Configure CMakeLists.txt for your project.
  3. Configure toolchain-iar-9-arm.cmake to match your IAR installation path.
    set(IAR_TOOLCHAIN_ROOT "C:/Program Files/IAR Systems/Embedded Workbench 9.0/arm")
  4. Configure CMakePresets.json to use the toolchain created earlier."toolchain": "CMake 3.24"
  5. Right-click CMakeLists.txt in the project tree and click Load CMake Project
  6. In CLion, navigate to Settings | Build, Execution, Deployment | CMake and enable the Default preset profile Clion Settings CMake
  7. Add your code to main() and cppMain functions

Alternative to steps 4 - 6: In CLion, navigate to Settings | Build, Execution, Deployment | CMake
Create a new profile or select an existing one and Under CMake options: add:
-DCMAKE_TOOLCHAIN_FILE=$CMakeProjectDir$/toolchain-iar-9-arm.cmake

Debug

  1. Open Run Configurations
    1. Drop existing one(s)
    2. Create OpenOCD Download & Run
    3. Click “Assist”, find your board, or closest to your config
    4. Click “Copy to Project & Use”
      Run Configuration Settings
    5. Open OpenOCD config file and add to the very end
  2. (Optional) Enable semi-hosting via .gdbinit
  3. Set breakpoint to the very beginning of main()
  4. Click debug button
  5. Wait
  6. Debugger works
  7. Enjoy!

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CLion project stub with IAR toolchain

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