TouchFX Zephyr Integration Font Issue

[karsparskambala]

Hi,

I am working on integrating TouchGFX into Zephyr and have made some progress. However, I am currently facing an issue where the text appears scattered and displayed strangely.

I have enabled DMA2D, and the font data is stored in external QSPI flash and loaded into external internal SRAM. My board is the STM32H750B-DK.

Any help or tips would be greatly appreciated. Could you possibly guess the reason by looking at the image? The texts are displayed better after I press the reset button following the initial flash

[MM..1 · Accepted solution]

Try disable DCACHE

[karsparskambala]

Yes, that's it! Thank you very much! After disabling the DCACHE, the font issue is solved. Does this mean that all TouchGFX applications with text disable the DCACHE?

[GaetanGodart]

Hello @karsparskambala ,

You can use DCache with TouchGFX (with every RTOS), I don't know why it did not work this time.
My best guess would be that the MPU (memory protection unit) was not configured properly.

Regards,