Touchgfx TFT Display Flickering Issue

[Chandan Bhatia1]

Hello, I am using display TCXD050ABLON (Data sheet Attached) with STM32F746. As per datasheet I did below LTDC setting and still display is flickering badly.

Few screen shots of display setting as per datasheet is below.

Few Images of flickering display is as below.

Any suggestions?

[Chandan Bhatia1]

@Alexandre RENOUX​  did you get the chance to check this? As we are making intial samples of pcb and I m facing this big problem.

[Chandan Bhatia1]

@Alexandre RENOUX​  did you get the chance to check ?

[Martin KJELDSEN]

Hey,

Fill me in here. When is the flickering occuring? Is there a pattern? Is it sometimes flicker free? Can i see a video? You could be dealing with memory contention issues on your bus - Try hal.lockDMAToFrontPorch(true); just to make sure that DMA2D is not accessing RAM while LTDC is. It's a good handle to rule out memory issues, anyway.

/Martin

[Chandan Bhatia1]

hi @Martin KJELDSEN​  I think , Please checking using below link. Unable to attach video here.

https://drive.google.com/file/d/1elOU3V3f6hYkxnab2KKErTV5uTpqgvfk/view?usp=sharing

Also below are my LTDC settings.

 

[Martin KJELDSEN]

You need to give me access to that file :) Requested.

[Martin KJELDSEN]

Okay, that definitely looks like an LTDC configuration issue, yeah. Can you show me what the intended output is? e.g. from simulator

[Chandan Bhatia1]

@Martin KJELDSEN​ Even i m thinking same. Did you check my LTDC settings?

Below is output image:

[Martin KJELDSEN]

I have to get back to you tomorrow on the settings - Need to cross check some things and can't spend the time right now. ok?

[Martin KJELDSEN]

Have you tried making anything else run on this display? A simple example of just writing pixels to the framebuffer, for instance.

[Chandan Bhatia1]

I didn't try simple pixel, just tried multiple combination of polarity LTDC setting. Actually pcb is manufacturing in some other country so need other person help to flash it and test. Due to this issue production deadlines is also shifting.

Please try to check settings tomorrow.