JLink USB is suddenly not detected in nRF52833/nRF9160 DK

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

choehyunho — Tue, 10 Aug 2021 10:27:09 GMT

To verify USB hub problem, I removed all connected devices and clean up enumerations from my desktop.

After re-enumerating devices one by one, I confirmed nRF DKs are detected properly.

I will try to monitor whether similar problem happens again, but for now, the problem is caused by hub, not DK board.

I'll leave results if further issue exists.

Thank you.

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

Albrecht Markus Schellenberger — Fri, 06 Aug 2021 09:08:32 GMT

Hello,

[quote user="choehyunho"]All these boards are work fine, only my several 52833 DKs, and 9160 DK is not working on this hub.[/quote]

Are you using several devices connected to the USB hub at the same time or does this also happen if only one of the nRF52833/nRF9160 DKs is powered-up?

[quote user="choehyunho"]Any idea or suggestion?[/quote]

I wonder if this has anything to do with voltage drops that our DKs can’t handle? Do you have the possibility to test this with another USB hub?

By the way: I will be on vacation for the next couple of weeks. If you need any more support concerning this issue, I recommend you to create a new case referring to this one. One of my colleagues will help you then.

Regards,

Markus

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

choehyunho — Thu, 05 Aug 2021 11:27:52 GMT

Mostly agree to you.

The JLink device driver installed to PC is not related to this problem.

DK board just blinks LED fast only, as if it is not connected to USB port at all.

I think even the USB device enumeration is not progress at all.

The strange point is that I use several USB-serial ports and JLink devices at the same USB hub, including 2 JLink Base debuggers and even the similar DK from other H/W vendor (Dialog).

All these boards are work fine, only my several 52833 DKs, and 9160 DK is not working on this hub.

Any idea or suggestion?

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

Albrecht Markus Schellenberger — Thu, 05 Aug 2021 11:06:29 GMT

Thanks a lot for the feedback!

[quote user="choehyunho"]And, with further testing, this only happens when I connect DK on external USB hub.[/quote]

I’m honestly a little bit unsure if this has something to do with the J-Link driver. Because when powering on your DK’s, you should at least get a COM-port in the Device Manager (which then probably wouldn’t be recognised as such when no J-Link drivers are installed).

[quote user="choehyunho"]

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?

[/quote]

The DK’s I’m using myself are as well connected to an USB hub, but this one has external power supply. Switching that off, I lose connection to my board(s). So my wage guess here would be that this might be a problem with the USB hub itself.

Regards,

Markus

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

choehyunho — Wed, 04 Aug 2021 06:04:29 GMT

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.

RE: JLink USB is suddenly not detected in nRF52833/nRF9160 DK

Albrecht Markus Schellenberger — Mon, 02 Aug 2021 12:36:34 GMT

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