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Repka123_
Associate

‎2024-11-01 07:37 PM

I am trying to create a BLDC Controller project based on VESC using the STM32F405RGT6 microcontroller. I have successfully flashed the bootloader and uploaded the firmware using STLink. However, when I connect the IC to my laptop via USB, the IC is detected and can run the firmware only for a few moments (around 2 minutes) before disconnecting. What could be the issue?


Screenshot 2024-11-02 091902.png

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4 REPLIES 4
Tesla DeLorean
Guru

‎2024-11-02 04:52 AM

Pulling too much power or reseting. Perhaps scope supply vs NRST

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liaifat85
Senior III

‎2024-11-02 05:54 AM

Check the output of the  AMS1117-3.3 voltage regulator. If the regulator overheats or becomes unstable, the microcontroller could reset or disconnect.

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PGump.1
Senior III
In response to liaifat85

‎2024-11-03 05:12 AM

Hi,

There are 1002 possible reasons why this is happening -

  1. bad hardware
    ...

     1002. memory leak.

I hope this helps.

Kind regards
Pedro

AI = Artificial Intelligence, NI = No Intelligence, RI = Real Intelligence.
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gbm
Lead III
In response to PGump.1

‎2024-11-03 10:35 AM

Ordinary lockup of USB stack due to calling transmit routine from the main loop?... Just wild guess, not really enough info for a reasonable answer.

My STM32 stuff on github - compact USB device stack and more: https://github.com/gbm-ii/gbmUSBdevice
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