STM32H750B-DK: White Screen / Freeze after enabling TIM15 in CubeMX - Persists even after reverting

[Dri_Zzl]

Hi everyone,

I am working on a TouchGFX project using the STM32H750B-DK Discovery Board. The project works perfectly fine (UI is shown, everything runs smooth).

The Issue:

As soon as I enable a Timer in CubeMX (e.g., TIM15 or TIM3 in Input Capture mode) and regenerate the code, the display stays white after flashing. The application seems to crash or hang completely during initialization.

Observation:

Even if I disable the Timer in CubeMX again and regenerate the code, the display remains white.

It seems that the first modification permanently breaks the project configuration (likely LTDC, QSPI, or MPU settings), and I have to restore a backup to get it working again.

Has anyone experienced this behavior where simply touching the configuration breaks the board initialization permanently?

Thanks for any help!

[TDK]

Use a tool like WinMerge to diff the changes in the code between the original and what you have now. It would identify the issue quickly.