Associate III

Question

Display flickering STM32F746

Hello, I am using STM32F746 with FMC SDRAM, QSPI flash, DMA2D. I observed my display is flicking. You can check video using below link.

Any suggestions for solving this issue.

I am using custom board with MCU 746 with below software with version :

Thanks

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Senior

Change (reduce) the LCD-Clock Speed and test.

Associate III

I tried.. Kinda same

A

Anonymous

Move widget, which is flickering, to top, above other widgets

Like this

Visitor II

Hello Chandan Bhatia,

From the look of your video, I suppose that you have created your project from scratch with a custom display.

I believe it's related to the DMA2D. First check your MPU settings.

Also uncomment all the lines where you have SCB_CleanInvalidateDCache(); (They should be located in STM32DMA.cpp and TouchGFXHAL.cpp).

/Alexandre

Associate III

@Alexandre RENOUX Hi, I am using custom board with MCU 746 with below software with version :

Below are the settings for DMA2D

In My project, I searched for SCB_CleanInvalidateDCache(), but I am not directly calling it anywhere.

I didn't enable MPU. Check my system view.

Visitor II

MPU needs to be enabled. Please refer to the Application Template F746-DISCO available in TouchGFX Designer.

/Alexandre

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