Problems with J-Link on nRF5340

RE: Problems with J-Link on nRF5340

Eva Marie Moeller — Fri, 06 Aug 2021 07:20:04 GMT

Hi,

thanks! That solved the problem!

RE: Problems with J-Link on nRF5340

Kenneth — Fri, 06 Aug 2021 07:07:55 GMT

Try to unplug the usb cable from the nRF USB (J3 header), then set the switch to VDD power. Now connect the USB cable for the DK (J2 header) only. See if you can recover the board with the nrfjprog commands then.

Kenneth

RE: Problems with J-Link on nRF5340

Eva Marie Moeller — Fri, 06 Aug 2021 06:21:31 GMT

Hi,

thanks a lot for your reply.

Yes, i've restarted the PC and plugged/unplugged the device multiple times, but it didn't help. Strangely it seems when i tried again today, that the error has changed.

I installed the latest nRF command tools (10_13_0) and tried the given commands:

devzone.nordicsemi.com/.../v10_5F00_13_5F00_0_5F00_log_5F00_recover_5F00_coprocessor.log devzone.nordicsemi.com/.../nrfjprog_5F00_output.txt

Since there appeared a lot of errors i also reinstalled the my previous used nRF command tool version (10_12_2) which lead to the following output/log:

devzone.nordicsemi.com/.../v10_5F00_12_5F00_2_5F00_log_5F00_recover_5F00_coprocessor.log

I also took a picture of the used DK:

the nRF power source is in the "USB" position. I didn't consciously change anything since it last worked.

RE: Problems with J-Link on nRF5340

Kenneth — Thu, 05 Aug 2021 15:11:03 GMT

Sorry to ask, but have you tried the re-start PC and unplug/plugin DK and see if that make any difference?

Possible also re-install the latest nRF command tools to see if that make any difference. You can run "nrfjprog --version" afterwards, and then "nrfjprog --recover --coprocessor CP_NETWORK" and "nrfjprog --recover". Please share screenshots.

That said, if you still have problems, maybe take a picture of your DK so we can see if all jumpers and headers are in the correct position. Maybe you have by accident touched the nRF power source switch.

Best regards,
Kenneth