Background corrupted during transition

[CPink.1]

I am having an issue with transitions between screens. I’m using a cover transition but as soon as the transition starts the background turns to noise however the new screen covers it gradually as expected.

 

The program is running from QSPI flash on a stm32h750 dev board with a LCD connected to the FMC. The double frame buffers resides in the internal AXI sram.

I have tried adding an animation buffer also in the AXI sram, but it had no effect.

Has anyone had corrupted background like this or can recommend something I should check?

[CPink.1]

I had some success!

If I set the entire AXI sram to 0s on boot, instead of noise in the background it is all black. It's like the second buffer isn't getting used except when transitioning. Maybe it’s a bug with TouchGFX? i'm using 4.17.

After changing from double buffer to single the problem goes away and everything looks as it should.

Anyone else had problems with double buffering?

[jee]

Hi,

As well as you, but I'm using external RAM. When I use the Double Frame Buffer, the issue will happen.

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[Romain DIELEMAN]

Hi,

Are you also working on a ST development kit ? Could you maybe share your project or your setup to see if I can replicate it ?

/Romain

[Mello]

Good morning,

I send you here my project, I interface an incremental rotary encoder with a tft screen and I use touchgfx for the user interface (a menu).

if I change button with the encoder the screen does this (in the video) I don't know what this phenomenon is called, can someone tell me more?

ps: I thought it was because of the noise of the encoder so I removed it and I changed the button softwarly and it gave the same result.

thank you