Unable to program nRF52940 PDK via JLINK

[Roger Clark]

I installed the latest JFlash (6.12d) from Segger's site, and it updated the JLink firmware.

However when I try to program the hex files downloaded from www.nordicsemi.com/.../Getting-started-with-the-nRF52840-Preview-Development-Kit

I get a message in JFlash

"Sorry, no valid license for J-Flash found" "J-Link S/N is 683404738"

Edit. I can read back using JLink, and I did select the correct device, I just can't program due to this license issue. I can program by copying hex files to the mass storage drive "JLink", but it would be better if JLink was working (fixed)

[endnode]

Hi Roger,

Have you ever programmed any device by that J-Link SW package installation on that particular machine? I would recommend to stick with Nordic's nRF Tools (or nRFgo Studio if you insist on GUI based tools). If you insist on SEGGER J-Link/J-Flash then there should be "J-Flash Lite" executable installed with the package which is free license (if you don't use it for commercial/manufacturing purposes). It can erase/program/verify HEX and BIN images for given MCUs.

Cheers Jan

[Roger Clark]

@Jan

Thanks.

Looks like its just JFlash that does not work.

I presumed the since JFlash was displaying errors with the license, that it would not be possible to program the board using the JLink interface.

However, I tried JLink Commander and it works fine, and it was possible to upload via Keil. So I will try a few other IDE's e.g. VisualGDB and Eclipse.