Unable to Flash Blinky

RE: Unable to Flash Blinky

moeinpi — Mon, 11 Nov 2024 15:17:01 GMT

Me too!

RE: Unable to Flash Blinky

patratacus — Fri, 14 Jun 2024 03:57:07 GMT

I had a problem with the 7.94e that got installed automatically with the nRF Command Line Tools install. I went to segger.com and download the latest Jlink software and documentation pack (7.96I as of this post). All of sudden my nRF5340DK Jlink shows up in the JLink Configurator. So I guess it was a driver issue with the older version of Jlink. Now it's working.

RE: Unable to Flash Blinky

calakmul01 — Fri, 31 May 2024 21:42:08 GMT

I had the same issue and resolved it by installing J-link v7.88. Definitely a pattern.

RE: Unable to Flash Blinky

BrettS — Sun, 19 May 2024 06:51:02 GMT

I had an identical experience as robbsadler. New laptop. Issue was resolved by rolling back to J-link v7.88. Also uninstalled v7.88 and re-installed 7.96h. Issue remained solved.

Seems like a pattern.

RE: Unable to Flash Blinky

robbsadler — Sat, 11 May 2024 17:40:42 GMT

I had the same issue going through the nRF Connect SDK Fundamentals course.

I had installed J-Link 7.96g and got the error "ERROR: No debuggers were discovered."

I ran nrfjprog -i and saw no devices connected

Uninstalled J-Link and installed 7.88j and the device showed up and I was able to flash.

Uninstalled J-Link and reinstalled latest and the device still shows up. Something missing in that later version I guess.

Gonna leave a note in the course feedback.

RE: Unable to Flash Blinky

kriswilk — Fri, 23 Feb 2024 13:59:24 GMT

On one hand, I'm very glad to hear that the same process worked for you, too. If you upgrade to 7.94k as I did, does it continue working? It did for me.

On the other hand, I'm hoping Nordic can shed some light on WHY this would be a problem at all, especially if you were using the J-Link installed by the Command Line Tools. That's a problem, especially for a beginner.

In case it matters, the onboard firmware on my DKs was from fall 2022. After all my tinkering and getting everything working, I upgraded the DKs to the latest J-Link firmware (2023-10-30). Everything still working.

Looking forward to hearing what Nordic thinks happened here. Really hoping they can reproduce the problem to investigate it fully.

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Fri, 23 Feb 2024 05:30:36 GMT

You are a lifesaver!

I had JLink 7.94e installed. I believe this was automatically installed during the installation process/instructions.

I then installed 7.88j as you suggested, and it worked!

Hopefully the installation instructions can be updated to use working versions of JLink.

RE: Unable to Flash Blinky

kriswilk — Fri, 23 Feb 2024 04:24:38 GMT

I was just having the EXACT same problem. I have an nRF52840-DK and nRF52-DK, a brand new PC with Windows 11, and had freshly installed VS Code, nRF command line tools, and extension pack for VSC. Was trying the same blinky app from the SDK fundamentals course, following the instructions to the letter.

Only deviation was that I had also installed the latest J-Link Software (7.94k, from yesterday).

I was getting the exact same errors, J-Link Configurator was not seeing either DK, and in Device Manager, there was a "BULK device" and two "USB-Serial" devices (but not the usual "JLink CDC" type). Very weird.

Out of curiosity, I uninstalled JLink 7.94k and installed an older version, 7.88j. Suddenly the DKs were seen by Configurator and all worked fine in VSC.

Then (even more strangely), I uninstalled 7.88j and reinstalled 7.94k, and everything still seems to be working. Need to try rebooting to see if it survives that.

Maybe give this a shot and report back?

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Fri, 23 Feb 2024 01:22:37 GMT

Hello,

I have tried installing everything from scratch on a different PC, and same results:

-- west flash: using runner nrfjprog
-- runners.nrfjprog: Flashing file: \blinky\build\zephyr\merged.hex
ERROR: No debuggers were discovered.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
FATAL ERROR: command exited with status 41: nrfjprog --program '\blinky\build\zephyr\merged.hex' --sectorerase --verify -f NRF53 --coprocessor CP_APPLICATION --snr 1050126393

These are the installation instructions I am following. Is this the correct procedure for installing everything?

developer.nordicsemi.com/.../install_ncs.html

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Thu, 22 Feb 2024 05:56:06 GMT

Hello,

I have tried multiple different use cables for both the nRF5340 and nRF5340DK,

I have verified that the USB is connected to the left side of the DK, and I have tried every USB port on my PC.

and I have verified that SW6 is set to default.

Attached are some pictures for reference.

The only thing left I can try is to install everything on a difference PC.

RE: Unable to Flash Blinky

Einar Thorsrud — Wed, 21 Feb 2024 08:30:31 GMT

Hi,

I see. There are a few things we can check:

Verify that you are using the USB port on the left side on the DK, as thi sis the one that is connected to the onboard debugger.
Verify that SW6 is in the default position

If it still does not work, can you try a different USB cable and avoid any USB hubs? Also, have you done any modifications on the DK? If still no luck, please upload a photo of your DK so that I can see both switch positions and how it is connected.

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Tue, 20 Feb 2024 18:02:43 GMT

Hello,

After opening J-Link Configurator and plugging in my nRF5340 board, the program says no boards found. Do I need an external Jlink device for programming the Development Kits?

I have tried connecting to the nRF5340 dev kit, and the nRF5340 Audio dev kit, with no luck.

Is there a dip switch setting, or button sequence that must be done prior to plugging in these boards?

RE: Unable to Flash Blinky

Einar Thorsrud — Tue, 20 Feb 2024 08:34:43 GMT

Hi,

There seems to be an issue with the debugger. Can you try to re-program the onboard debugger firmware from J-Link Configurator and see if that helps? You should allready have that installed on your computer as part of the J-Link driver pack.

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Tue, 20 Feb 2024 02:47:46 GMT

I have also tried through nRF Connect for desktop using the programmer with a similar issue.

My D: shows Jlink if this helps:

RE: Unable to Flash Blinky

a.calpitojr@gmail.com — Mon, 19 Feb 2024 19:42:16 GMT

Hello,

nothing seems to happen when I try that. Here is a screenshot of what I am seeing.

RE: Unable to Flash Blinky

Einar Thorsrud — Mon, 19 Feb 2024 07:54:21 GMT

Hi,

You get the "ERROR: No debuggers were discovered" error (which is also what status 41 indicate) for some reason.

Can you see if the debugger is found with "nrfjprog -i"?

If that works, can you successfully do an "nrfjprog --recover --coprocessor CP_NETWORK && nrfjprog --recover"?