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]

@endnode

This is the first nRF DevKit board that I've tried to use with the segger tools

I have an nRF52832 dev kit as well, but I just uploaded using drag and drop to the USB mass storage.

I'd assumed that the Segger programmer on these boards was fully functional, like STM's Discovery and Nucleo line of boards which have STLink adaptors built in, which are fully functional and not cut down versions.

I've have used other nRF51 based boards, but not Nordic's DevKit boards, so I always used various other external programmers.

Looking at JFlash Lite, its so cut down its not worth using, I'll just use JLink Commander instead, (to Flash the SD) as it seems to be fully functional