Troubleshooting LTDC

[GK28]

Hello,

I am developing a GUI application with TouchGFX which I would like to run on a STM32F767ZI connected via LTDC to a display with RGB888 interface.

The display datasheet: https://newhavendisplay.com/content/specs/NHD-5.0-800480AF-ASXP.pdf

I am having problems with the configuration in CubeMX. I followed the guide in AN4861 to configure the LTDC but I am still having problems.

With my current configuration, when I set the background for the LTDC to red, and the Layer 1 to transparent (alpha = 0), I can see that the display correctly displays a red background.

When I set the Layer 1 to opaque (alpha = 255) with a red background, the display always shows a black background with a TV static like white rectangle on the top of the screen. It doesn't matter if I added TouchGFX as a Middleware or not, it always displays the same thing.

Current configuration attached.

Thanks in advance for the help!

[GK28]

I am inserting the attached photos directly. I added a picture of the screen with a static rectangle when the layer 1 is enabled and a picture of the background for the LTDC working currently when layer 1 is set to transparent.

LTDC configuration

LTDC configurationLTDC pins

Static rectangle with Layer 1 enabledBackground works with layer 1 set to transparent