Re: nrf52840_pca10059 startup

Carles Cufi

Hi there,

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, " on behalf of Henrik Brix Andersen" < on behalf of> 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?

Best regards,
Henrik Brix Andersen

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