Hi, I'm new to the nRF52840 PDK and using it for some evaluation purpose for a specific product.
Would you mind telling me how to debug the board? Is it just plug in the USB cable(J2) and turn on the power switch?
It showed the error msg as below when I click the "Start/Stop Debug Session" in Keil uVision 5. And it seems Keil cannot find the J-Link adapter in "Cortex jlink/JTrace Target Setup"