Can you tell us how you're flashing the board? Another Nordic Devkit, or a separate debug IC?
Also copying Emanuele who's doing most of the work on this board.
On 26/08/2018, 18:07, "email@example.com on behalf of Henrik Brix Andersen" <firstname.lastname@example.org on behalf of email@example.com> wrote:
I have just acquired an NRF52840 Dongle (nrf52840_pca10059) and I am facing some difficulties with board startup.
When I flash a zephyr binary to the board (e.g. samples/basic/blinky) the board starts up fine and starts the application.
But when I disconnect the board from USB power and reconnect it, the application no longer starts (and the internal DC-DC converter does not seem to start-up either).
If I run no-op pyOCD command (e.g. pyocd-flashtool -t nrf52840) the application springs to life (e.g. for blinky, the LED starts to blink).
I am not using mcuboot or any other bootloader; just the bare-bone sample application.
What am I missing here?
Henrik Brix Andersen