I have been learning to use the nrf52840DK for some time now, though I would consider myself still a beginner. Anyway, something has gone wrong with the kit and I am not sure what. It does not seem to be able to connect with the J-link I've been always using.
Two days ago, I was able to connect it to my PC and download and debug code naturally. I was even able to use the J-Link EDU kit normally, with both the 19-pin and the 9-pin Cortex-M adaptors. Yesterday, I plugged the kit in my PC, as always through the USB. LED5 is on, as always, and the kit is recognized as a J-Link driver. I thought that everything was OK, but in SES, the connect J-Link command returned the "Failed to connect to target" error. The J-Link EDU kit's light was orange. Something has gone terribly wrong. I have tried resetting the kit and downloading the J-Link OB file in the Bootloader, but that does not change anything.
The first time I connected the DK to my PC today, it acted normally and I was even able to connect the J-Link, though LED2 and LED3 were on unexpectedly. I downloaded an example just to see that it works, and at first it worked. After a few seconds the kit was no longer available for J-Link connection in SES (although visible as a J-Link Driver in MyComputer) and the program had stopped its execution (the LEDs were blinking no more). After disconnecting and reconnecting the kit, LED5 is just on, but nothing changed. The downloaded program is not being executed and the J-Link connection is not possible.
Do you know how I could fix this issue?
Thank you in advance!
