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Visitor II
July 11, 2024
Question

Led staying red on STM32H747I-DISCO

  • July 11, 2024
  • 2 replies
  • 2497 views

Hello, I am wondering why the led (LD10) stays red on the board after plugging in a micro USB cable to power it on (thus I assume that's the reason the screen stays black).
The USB cable is connected to the board (CN2 ST-LINK V3 port) and to a laptop on the other end. The JP6 jumper is on STIk on the back. See the attached pictures for details. Is there anything I did wrong ? Or should I launch something else to make the LED green?

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    2 replies

    Super User
    July 11, 2024

    LD10 being solid red is correct behavior. It indicates the USB has been connected and enumerated.

    TDK_0-1720726476351.png

     

    As for why the screen is black, must not be a program on the board that uses the screen. Has it ever worked? Was the chip erased? Can STM32CubeProgrammer connect, and if so, is the flash programmed?

    TECOAuthor
    Visitor II
    July 12, 2024

    Thanks for your answer.
    As for the screen, I did not do anything with the chip yet, just connected it with the USB cable. So the next step is to install different softwares to set it up?

    Super User
    July 12, 2024

    You're asking how to develop programs for the board? STM32CubeIDE and/or TouchGFX.

    Or if you have a precompiled program and just want to load it, you can use STM32CubeProgrammer.

     

    The chip should come with software installed which uses the screen. You can use the steps I suggested earlier to see if there's a program on the board.

     

    Technical Moderator
    July 12, 2024

    @TECO Correct.

    In the top right of your screenshot, you see two light blue buttons: Erase selected sectors and Full chip erase. Just click on the right one.

    TECOAuthor
    Visitor II
    July 19, 2024

    Thanks for your answer Peter :)