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Graduate
February 17, 2025
Solved

STM32 Stuck in boot mode

  • February 17, 2025
  • 1 reply
  • 598 views

LopsidedCoder_0-1739809281448.jpeg

I'm using the STM32H753ZIT6 NUCLEO Board. For some reason the User LED's are on by default even without any code on it. I tried to press the reset button but it would just blink the led's. I read on another forum to short the BOOT0 and Vdd pins but was hesitant to try that. The board works fine sometimes but it tends to give random/no outputs some times. 

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    Best answer by TDK

    The LEDs will only turn on if the program running on the microcontroller turns them on. I'm not seeing a problem here, or a reason to believe they are misbehaving.

    1 reply

    Super User
    February 17, 2025

    What makes you think it's stuck in boot mode?

    The default program uses the LEDs on the board. Pressing the blue user button will cycle them.

    Graduate
    February 17, 2025

    My bad on that. The reason I thought this was a problem is because I have another board which runs fine but does not turn on the user LED's when I connect it to my laptop. What I feel is happening is that its stuck. Could you please correct me if I'm wrong?

    TDKAnswer
    Super User
    February 17, 2025

    The LEDs will only turn on if the program running on the microcontroller turns them on. I'm not seeing a problem here, or a reason to believe they are misbehaving.