JLink USB is suddenly not detected in nRF52833/nRF9160 DK

[choehyunho]

Hi teams,

Recently, I upgraded JLink driver to 7.5x and suddenly all of my nRF DK boards are not detected via USB.

All of my 4 DKs shows the same symptom. LED5 near JLink FPGA chip is fast blinking continuously.

But, in device manager in Windows 10, there is no USB device is shown (even the yellow banged mis-detected/mis-configured device is not exist).

But still, my other SEGGER Jlink Base is working.

How can I fix this?

[Albrecht Markus Schellenberger]

Hello,

Have you updated your JLink drivers via the Command Line Tools? If not, please do so (use version 10.13.0) and check if that makes any difference.

For verification, you should get the following output from a terminal after the installation:

 

user@pc MINGW64 ~/ncs/v1.6.0
$ nrfjprog --version
nrfjprog version: 10.13.0
JLinkARM.dll version: 7.50a

Regards,

Markus

[choehyunho]

I have updated nrfjprog as you recommended, but no difference.

First of all, DK boards has not recognised as USB device.

And, with further testing, this only happens when I connect DK on external USB hub.

When I connect DK directly to PC, it works fine.

Strange thing is that in the previous JLink version, there was no problem even it was connected via hub.

Should I ask question to Segger company?

But I think this should be noticed to this forum, because other JLink devices are works fine after upgrade.