STM32CubeIDE adding code to main.c - code disappears

[chriskuku]

Is there a rule where to put code into main.c so that it stays there permanently? It happended to me now a couple of times that I added an interrupt callback function which suddenly disappeared. Are there areas in main.c where to safely put those?

[Foued_KH · Accepted solution]

Hello @chriskuku​,

You should add the functions in the User Code section:

/* USER CODE BEGIN  */
(..)
/* USER CODE END  */

Ensure that following option is checked: "Keep User Code when re-generating". In this case, the user sections defined by STM32CubeMX are preserved.

Note that when upgrading to a new version of STM32CubeMX, make sure to always backup your projects before loading the new project (especially when the project includes user code).

I hope that this brings some help to you.

Foued