Hi,
I am unable to get any programs using Zephyr to run on an nRF52840DK.
- I have tried using the latest DAPlink (from GitHub) and JLink firmware (from Segger) as well as the latest firmware binary available from https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF52840-DK/Download.
- I can successfully flash binaries of Mbed OS or Zephyr using PyOCD or drag-and-drop with all firmwares, as well as nrfjprog when using JLink firmware (nrfjprog does not detect the board with other firmware)
- With DAPlink firmware LED5 will blink 3 times, and it also blinks whenever serial data is sent to the board
- With JLink firmware, LED5 is lit almost constantly (it blinks off for a fraction of a second about once per second).
- With MBED firmware, LED5 is lit constantly
- With all firmwares, there is no serial output from Zephyr programs. If I try to control LEDs programmatically there is no effect.
I have experienced the same issue on 3x nRF52840DKs which I believe came in a single shipment. As mentioned I am able to reflash the firmware and run mbed OS programs at will.
