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ST-LINK Firmware version : V2J28M18 issue

Question asked by Dilbert K on May 28, 2017
Latest reply on May 29, 2017 by Dilbert K

Had been struggle this issue for some time without solution.  Hope some from ST would know this.

I am using the AC6 (System Workbench) and using STlink V2 on Nucleo-F411RE.

When I started the debugger, will have following error :

Info : clock speed 1800 kHz

Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED

Info : STLINK v2 JTAG v28 API v2 M v18 VID 0x0483 PID 0x374B

Info : using stlink api v2

I checked the version from ST Utility (V4.0), it show following.  But when I tried to perform ST-Link Upgrade --> Device Connect will show "ERROR" saying STLink not exist !!

ST-LINK Firmware version : V2J28M18


Today, I finally able to get an older version of the Nucleo-F411RE board.  All the problems I experienced are gone....

Info : clock speed 1800 kHz

Info : STLINK v2 JTAG v24 API v2 M v11 VID 0x0483 PID 0x374B

Info : using stlink api v2

ST-LINK Firmware version : V2J24M11


Since I could not even connect to the ST-Link Upgrade software, is there any way to load back older version of ST-Link ??

Suggestion is very welcome.