Hi I have been using 480x272 Resistive display in my TouchGFX project The project has been created using CubeMx for STM32F746G discovery board controller We have used the stm32f746G board display configuration for Resistive display.

[STM-User]

While running of resistive display,some oscillations on the texts appeared on the screen

Sometimes noise came on display.I have attached the video that shows the display noise

Capacitive touch parameters(Vsync,Hsync) have been used for Resistive touch screen

Is there any difference in Resistive and capacitive screen sync parameters ?

And what could be the reason for the display noise on screen while running .

Display Init parameters in touchGfx hardware Lcd init code

HorizontalSync = 40;

VerticalSync = 9;

AccumulatedHBP = 53;

AccumulatedVBP = 11;

AccumulatedActiveW = 533;

AccumulatedActiveH = 283;

TotalWidth = 565;

TotalHeigh = 285;

[chaaalyy]

For me, that looks like a problem with cache configuration... Two years ago i made a gui with STemWin on a f746 disco board and there have been many bugs in the libraries. So when i enabled D-cache at initialization, immediately i got the same behaviour...

I would give this a try: Search for the call to SCB_EnableDCache and replace it with SCB_DisableDCache just for testing, if the problem still occurs.

/Charly

[STM-User]

Thanks for your reply

As you said, I disabled the Dcache in my code.still the problem not solved