Ubuntu Raspberry Pi Jlink

[Jerry Easley]

Because I am experiencing Windows 10 stability problems using VSCODE/nRF_CONNECT_EXTENSIONS/nRF_CONNECT_SDK, I am trying to get the Zephyr development kit up and running under UBUNTU on a Raspberry Pi.  I have successfully installed the toolchain and VSCODE and can build the Blinky project without incident.

However, when I attempted to flash my nRF52840_dk I ran into a problem I cannot solve.  When I connect my dk to a USB hub, I don't see it when I do a "lsusb" command.  I have downloaded and (apparently) successfully installed the Segger device drivers, but when I do a "lsmod" command, I don't see any jlink drivers.  When I try to flash the dk it reports that it cannot find a device.

I'm at my wit's end; any help would be greatly appreciated.

Jerry

[Sigurd Hellesvik]

Hi,

Could you be missing udev rules for J-Link?

I have downloaded and (apparently) successfully installed the Segger device drivers

How did you do this?

Try to download and install manually from https://www.segger.com/downloads/jlink/ and/or nRF Command Line Tools

Regards,
Sigurd Hellesvik

[Jerry Easley]

I have done my very best to download ind install the Segger drivers.  Why do I need nRF Command Line Tools?  I don't mind installing them if you will tell me how.  Suppose I successfully downloaded them and installed them what would I use them for?

Regards,

Jerry

[Jerry Easley]

I have already downloaded nRF command line tools; I have two files a .deb and a .tar file; I don't know what to do with them; there are no instructions.

[Sigurd Hellesvik]

Jerry Easley said:

Suppose I successfully downloaded them and installed them what would I use them for?

Our tool nrfjprog can be used to program nRF chips.
It uses J-Link behind the scenes, so it should not be very different.

Only reason I suggest it is that the installer might do something that makes this work for you.

You forgot to answer if you have udev rules for J-Link set up?

Jerry Easley said:

I have two files a .deb and a .tar file; I don't know what to do with them

Found this random guide on google: https://chipwired.com/install-deb-file-raspberry-pi/

Tar files are compressed files, so you can "unzip" them.

tar xvf file.tar.gz

Then a README should appear, which have instructions.

Regards,
Sigurd Hellesvik

[Jerry Easley]

Sorry for the omission; since I don't know whar "udev rules for J-Link set up" is, I think the answer is probably no.

I understand what a tar ball is; the question is, into where should I unpack it?

[Sigurd Hellesvik]

Jerry Easley said:

Sorry for the omission; since I don't know whar "udev rules for J-Link set up" is, I think the answer is probably no.

udev is a linux tool for USB devices and such.  Read more on https://wiki.archlinux.org/title/Udev
If you are missing udev rules for jlink, it could explain why the DKs are not connected to your computer.

Do you have  the file  /etc/udev/rules.d/99-jlink.rules?

Jerry Easley said:

I understand what a tar ball is; the question is, into where should I unpack it?

You can start by extracting it into Downloads/temporary/ and then follow the readme from there.

Regards,
Sigurd Hellesvik

[Jerry Easley]

Hi Sigurd,

Yes I have "/etc/udev/rules.d/99-jlink.rules",