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NAakv.1
NAakv.1
Associate
October 28, 2020
Question

I have a B-L072Z-LRWAN1 board that I can no longer contact over STLink. Is there a way to update the USB driver?

  • October 28, 2020
  • 3 replies
  • 851 views

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3 replies

Tesla DeLorean
Tesla DeLorean
Guru
October 28, 2020

What to address your specific broken situation? Not really much detail to work from to determine if it is even driver related.

My recommendation here would be to strap BOOT0 HIGH so your broken code doesn't run, trying to connect/erase with STM32 Cube Programmer. Make sure the connection speed is a couple of MHz, for a CM0(+) device.

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NAakv.1
NAakv.1Author
Associate
October 29, 2020

When I try to debug, I get the error: OpenOCD child process termination. Reason Unplugged target, STLlink already in use or USB driver not installed. I try different nodes and get the same response, so it is definitely a PC issue. Also, TeraTerm does not see the nodes (I tried two).

Tesla DeLorean
Tesla DeLorean
Guru
October 29, 2020

So no ST-LINK or COM ports populate in Device Manager?

​

Try a different cable, charging cables will not work. Need to have a data cable, connected to center top end of the board opposite end to LoRa antenna.​

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NAakv.1
NAakv.1Author
Associate
October 29, 2020

Faulty cable! thanks for your help. All is good.

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