*** USB Error: [Errno 32] Pipe error ***

[rfb]

Freshly updated STLink2

[45228.161514] usb 1-2.4: new full-speed USB device number 15 using xhci_hcd
[45228.266791] usb 1-2.4: New USB device found, idVendor=0483, idProduct=3748
[45228.266793] usb 1-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[45228.266794] usb 1-2.4: Product: STM32 STLink
[45228.266795] usb 1-2.4: Manufacturer: STMicroelectronics
[45228.266797] usb 1-2.4: SerialNumber: Uÿl�I\xffffffc2\xffffff80IU7��\xffffffc2\xffffff87

> python3 pystlink.py  -d
Successfully connected to ST-Link/V2
  USB > f1 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (read_version)
  USB > f1 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (read_version)
  USB < 27 07 83 04 48 37
  USB > f5 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (leave_state)
  USB < 01 00
  USB > f7 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (read_target_voltage)
  USB < ed 05 00 00 ca 08 00 00
  USB > f2 43 01 00 00 00 00 00 00 00 00 00 00 00 00 00 (set_swd_freq)
  USB < 80 00
  USB > f2 30 a3 00 00 00 00 00 00 00 00 00 00 00 00 00 (enter_debug_swd)
  USB < 09 00
  USB > f2 22 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (read_coreid)
*** USB Error: [Errno 32] Pipe error ***

** added method names to debugging output

[rfb]

adding retry and tout options to the xfer call in read_coreid has no effect

[jxltom]

Call Pystlink()._connector._dev.reset() may help...

[hugokernel]

Hi,
Same problem here.
Freshly updated to V2J31S7 and I have the same error.

> ./pystlink -d
Successfully connected to ST-Link/V2
  USB > f1 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  USB < 27 c7 83 04 48 37
  USB > f5 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  USB < 01 00
  USB > f7 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  USB < d9 05 00 00 fb 07 00 00
  USB > f2 43 01 00 00 00 00 00 00 00 00 00 00 00 00 00
  USB < 80 00
  USB > f2 30 a3 00 00 00 00 00 00 00 00 00 00 00 00 00
  USB < 09 00
  USB > f2 22 00 00 00 00 00 00 00 00 00 00 00 00 00 00
*** USB Error: [Errno 32] Pipe error ***

No problem with OpenOCD.