Tip for STM32 developers: Convert your project from C to C++ with STM32CubeMX and Open System Workbench for STM32

We have compiled this tip for developers who work with the Workbench for STM and want to compile their project with C++.

Generate The C code in the STM32CubeMX according to the hardware configuration for the System Workbench for STM32. C++ code generation is not supported here.

Image 1: STM32CubeMX Code Generation – Project Settings

Open the created project with the System Workbench for STM32 (e.g. by double-clicking on the .project (File in the generated project folder).

Create The project. Error messages may still occur.

Convert Convert the C project to a C++ project using the System Workbench for STM32; use the context menu to do this.

Image 2: Project context menu in the project browser

Check The C++ project settings (normally nothing needs to be changed). The path settings are automatically copied from the previous C settings.

Image 3: C++ Project Settings

Name in the project browser main.c in main.cpp um.

Image 4: Project browser view

Add the following lines in main.h in addition:

…

#ifndef __MAIN_H

#define __MAIN_H

#ifdef __cplusplus

 external ""C" {

#endif

…

#ifdef __cplusplus }

#endif

#endif /* __MAIN_H */

Image 5: Code view main.h

Add the following lines in main.cpp in addition:

… /* Private function prototypes -----------------------------------------------*/

#ifdef __cplusplus

external ""C" {

#endif

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

#ifdef __cplusplus }

#endif

…

Image 6: Code view main.cpp

Clean the The project and its mistakes.

Create The project; no more errors should occur.
However, any potential warning signs should still be checked.

Further information

MicroConsult Training & Coaching on the topic of microcontrollers

MicroConsult Training & Coaching for C++ Programming

MicroConsult expertise on the topic of microcontrollers