OpenH7XXI with 10.1 inch capacitive LCD(D) display with Touchgfx

[lavanya]

Hi all,

currently I am Working with STM32H743BIT6 & TouchGFX  

I am facing issue with screen flickering,

I am using OpenH7XXI-C board with 7inch capacitive LCD(F) display (Working Fine No issue )

But With  10.1inch capacitive LCD(D) display (NOT Working)

If i display any img i am getting flickering screen.

but If i display without any img, only backround boxs with different colours,No flickering is there.

Tried changing LTDC as per datasheet But No use. 

Any guidance on this topic is really appriciated :)

[Osman SOYKURT]

Hello @lavanya ,

It could be interesting to measure the render time. Does the happens no matter what the size of your image is? Does the flickering happens where you're image is placed?
Which framebuffer strategy are you using? Single or Double framebuffer? What color format are you using in your project?

[lavanya]

Thank you for the response @Osman SOYKURT ,

>>Does the happens no matter what the size of your image is?

If I display img or background boxes there is No flickering, Whenever I update screen I am getting flickering image  (I am updating progress bar every 200msec).

if I change 200msec to 1sec I am getting flickering every 1sec.

>>Which framebuffer strategy are you using

Double framebuffer

>>What color format are you using in your project?

RGB565 and also tried with RGB888 No use same flickering is there 

I tried changing LTDC parameters as per datasheet but not getting stable screen while refreshing the screen. 

@STea  @STOne-32  Any guidance ?

[Osman SOYKURT]

Hello @lavanya,

Ok thanks for these extra information. I would recommend double checking the values set for your screen like Horizontal/Vertical Front/Back Porch. We have a documentation where you could also find additional clues for your issue.