nRF Programmer does not see J-Link

RE: nRF Programmer does not see J-Link

Marius_U — Thu, 10 Nov 2022 12:28:15 GMT

Thank you, your answer helped a lot.

RE: nRF Programmer does not see J-Link

Marte Myrvold — Thu, 10 Nov 2022 11:15:37 GMT

Hi,

Is this a DK or a custom board? If it is custom, does the device have an on-board debugger? If it does not have an onboard debugger, then it will not show up in the Programmer unless you are using an external debug probe, or it is in bootloader mode.

You can also try using nrfjprog --readcode to read out the code and store it in a path, see nrfjprog commands. This will provide you with a hex file where empty parts will be filled with F:

While non-empty parts will look more like this:

This does not work if readback protection is enabled.

Best regards,

Marte

RE: nRF Programmer does not see J-Link

Marius_U — Thu, 10 Nov 2022 07:56:11 GMT

Hmm, I did that, still cannot see J-Link in Programmer application:

Still no luck:

Is there any other way to check whether something is flashed into nRF MCU? Basically we're solving issue in production and trying to figure out whether Nordic MCU has bootloader flashed and I remember I used to be able to check memory in this app before, but now it cannot even find J-Link.

RE: nRF Programmer does not see J-Link

Marte Myrvold — Wed, 09 Nov 2022 11:49:00 GMT

Hi,

I see that the Programmer and Bluetooth Low Energy apps are using different versions of nrfjprog and JLink. Both are a bit old. Can you try uninstalling the old versions and installing the latest one from https://www.nordicsemi.com/Products/Development-tools/nrf-command-line-tools/download?

Best regards,

Marte