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STM32F769-Disco with STemWin - Problem refreshing TFT

Question asked by Luis Pereira on Apr 4, 2018
Latest reply on Apr 16, 2018 by Clive One

Hello,

 

I have a STM32F769-Disco, which I am using to study the STM32F7 peripherals for a project. I am now trying to test USB and Ethernet peripherals, writing some text do the display and here I found my problems. I can write successfully to display using emWin, but after some time, I cannot update anything on the TFT. I tried with GUI_DispStringAt, and it stop writing. I tried with Text widget with callbacks, and nothing worked. So I tried this simple code:

 

    GUI_DispStringAt("HELLO", 10, 20);
    GUI_DispStringAt("HELLO2", 10, 50);
    while (1) {

        GUI_Delay(100);

        GUI_DispStringAt("HELLO3", 10, 70);

   }

And "HELLO" and "HELLO2" are written, "HELLO3" never show up.

 

I want to note that I have a board, made my me, with an STM32F7 and a RGB screen. The code above work as expected, with all 3 "Hello" written. So I'm thinking this is a problem with the communication with discovery screen? Maybe DSI?

 

Thanks for you attention on this subject.

Sincerely

Luis Pereira

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