Often in transparent areas, in random locations, false pixels can appear. can cause such a problem?

Hello Sozde.1,

Do you have the same issue on the simulator ? Also can you try see what is invalidated when running the simulator ? (press F2 when the simulator is running)

F429 is not powerful enough to be used efficiently with huge display like 1024x600. I don't know if it could have an impact in your case but it's important to take that into account.

Your display is an LTDC display ? Please provide more information about your current setup (software versions, board, external flash, external ram, etc.)

/Alexandre

Dear Alexandre,

simulator works normally.

I did not observe any changes with the F2 key.

We use our own coreboard.

CPU STM32F429IET

SRAM IS42S16400J-7TLI

FHASH M29W256GL70N6

TFT ‎NHD-10.1-1024600AF-ASXV#-CTP-ND‎ 10.1" TFT w/CAPTOUCH

We used it on a 7 inch screen (800x480) before. there was no problem.

We are currently planning to test with STM32F746IET.

we couldn't understand my hardware or software problem!

What do you recommend. thanks.

Keil v5.29 (ARM Compiler v5.06 update 6 (build750)

TouchGFX Designer 4.15.0

Hello Soner,

Did you check your clocks ? What's your display clock speed ? Are your framebuffers in external SRAM ? What's the bandwidth of this SRAM ? Same for Flash.

I suspect your clock frequencies are two low and the bandwidth is limited.

/Alexandre