Programming External Board using NRF52840-DK

RE: Programming External Board using NRF52840-DK

Jared — Tue, 23 Aug 2022 11:29:25 GMT

Hi there,

Which file are you flashing from the build folder?

regards

Jared

RE: Programming External Board using NRF52840-DK

Belalshinnawey — Mon, 22 Aug 2022 10:07:39 GMT

adding, I am also using zephyr

RE: Programming External Board using NRF52840-DK

Belalshinnawey — Mon, 22 Aug 2022 10:02:36 GMT

I am using the tag connect cable, I also gave up powering the board from the debug port, I am connecting an external power supply 3V to my external board. When I am using the debug mode, the led on my board is blinking so I know the application is running correctly when I am using debug, however, if I try to use flash without debugging the led doesnt blink. when debugging, the program doesnt persist after I disconnect and reconnect power.

RE: Programming External Board using NRF52840-DK

nRF5xFanboy — Mon, 22 Aug 2022 09:38:17 GMT

Hi Betalshinnawey,

Just some thoughts :
- THe debug port on the nrf52840-DK does not power the external board over the debug port (see the hardware drawing on infocenter).

- Are you sure you did flash your external board and not the MCU on the development kit board? What cable do you use tag-connect ?

- Are you developing software based on NCS using zephyr or without zephyr?
If you use ncs+zephyr please make sure to enable the RTT longing in the proj.config

Best regards,
nRF5xFanBoy