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MMerc.1
MMerc.1
Associate III
September 3, 2020
Solved

Screen Tearing

Hi,

I am using the following screen and CPU : 4DLCD-70800480 and STM32F746BGT.

I configured the LTDC and TouchGFX parameter settings but the screen tears ...

I have attached all the configuration.

Best Regards

This topic has been closed for replies.
Alexandre RENOUX
Alexandre RENOUXBest answer
Visitor II
September 8, 2020

Your clock tree seems strange to me.

The LCD-TFT clock and the SDMMC clock looks wrong. If you look at the F746G-DISCO AT, the LCD-TFT clock is at 9.6 MHz. Try with this value and also try to avoid having clocks with a high number of decimals in any case.

/Alexandre

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4 replies

Alexandre RENOUX
Alexandre RENOUX
Visitor II
September 7, 2020

Hello,

Did you have a look at the F746G-DISCO Application Template in the Designer ?

What kind of tearing do you notice ? Could you provide a picture of the issue ?

/Alexandre

MMerc.1
MMerc.1Author
Associate III
September 7, 2020

Hi Alexandre,

I have attached some photos of the problem.

As you can see, it makes a tear when I change screens (no animation is used).

Best regards

Alexandre RENOUX
Alexandre RENOUXBest answer
Visitor II
September 8, 2020

Your clock tree seems strange to me.

The LCD-TFT clock and the SDMMC clock looks wrong. If you look at the F746G-DISCO AT, the LCD-TFT clock is at 9.6 MHz. Try with this value and also try to avoid having clocks with a high number of decimals in any case.

/Alexandre

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