Graphical glitches (Shadows) in my GUI

Question

Hello,

I'm facing a problem with my GUI-Application.

All objects in my GUI have some kind of "shadow".

I used a custom board (stm32f746) with the "HelloWorld"-Example (which I modified in colors and display size, adapted from the STM32F746G-DISCO Examples you provided).

SDRAM and LTDC-Settings seems to be correct.

I tried different displays, all with the same problem.

I wonder if anyone knows whats wrong here.

Thanks, Peter

Answer 1

Hi Peter,

based on the provided images I assume either some timing problem (LTDC settings, pixel frequency too high) or some kind of electrical problem. Can try to use different / shorter cable between display and MCU?

Additional idea: Can you try another power supply (laboratory power supply, not USB)?

Best regards,

Manfred.