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Tobe
Tobe
Senior III
March 15, 2024
Solved

G431 will run (somewhat) with debugger, but not on its own.

  • March 15, 2024
  • 3 replies
  • 1668 views

I have made a prototype, and it runs as just after upload. But when i just turn on the power, it wont. It does not matter if the st-linkv3 ist connected or not. When i reset it, via the NRST pin, it also wont run.

I already used the HSE and HSI, and checked on a nucleo, that my code is working (it does).

I dont know how i further can investigate this. The level of NRST is clean and the level is good.

Best answer by Tobe

It works:

I had to set nSWBOOT0 to 0. See picture attached.

Thanks a lot.

3 replies

mƎALLEm
mƎALLEm
Technical Moderator
March 15, 2024

Hello,

What about Boot pin? connected to VDD or GND?

See for example this thread: https://community.st.com/t5/stm32-mcus-products/stm32h723zgt6-will-not-reboot-after-powering-off/m-p/650457

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
    Tobe
    TobeAuthor
    Senior III
    March 15, 2024

    Neither: It is connected to RX of a CAN chip. See attached the waveforms.

    pink is Boot0 pin, blue is 3.3V of STM

     

    mƎALLEm
    mƎALLEm
    Technical Moderator
    March 15, 2024

    Hello,

    Neither: It is connected to RX of a CAN chip. See attached the waveforms.

     

    Sorry.. I didn't catch that point!  How did you connect Boot pin? which CAN chip? could you please share schematics?

    pink is Boot0 pin, blue is 3.3V of STM

    Pink signal is rising. It should be connected to the ground. Why BOOT pin voltage is changing?

    To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
    Tesla DeLorean
    Tesla DeLorean
    Guru
    March 15, 2024

    BOOTx pins or settings?

    Get a USART working very early in the Reset Handler so you can express signs-of-life. Could perhaps use GPIO/LEDs at as simpler level. Have Hard Fault and Error Handlers output actionable data.

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    Tobe
    TobeAuthorAnswer
    Senior III
    March 15, 2024

    It works:

    I had to set nSWBOOT0 to 0. See picture attached.

    Thanks a lot.

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