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I have a hard problem with a STM32. After uploading my own code to the STM32 it is not posibble to reconnect with them.

The error feedback: 17:18:34 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

I'm working with the STM32H735VGT6, connected with ST-link V2, software **STM32CUBEIDE **and STM32CubeProgrammer.

What can cause this problem? How do I reconnect to the STM32?

I have tried:

  1. Make BOOT0 HIGH, without results.
  2. I have removed several STM32 from the PCB again and placed a new one, after which it works. After my software has been uploaded, things go wrong and the STM32 can no longer be reached.

Option that I will try with new STM32:

  • Uploading blinking software.
Elektro17
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1 Answers1

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You probably have reprogrammed the SWD pins and they are not available for debugging (PA13 & PA14). You need to *connect under reset in STM cube programming or STMCubeIDE. Sometimes it is needed to keep NRST line manually low when the probe connects to ther uC.

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