Fanstel BT832X evaluation board with softdevice does not run

[Draco]

I have a Fanstel BT832X evaluation board (model EV-BT840(832)-V4). Nordic examples without softdevice are working fine. Examples with softdevice are not working. I have checked my evaluation board and made sure the SW5 switch is ON (32kHz clock is enabled). I even tried changing the `sdk_config.h` to use internal RC, but both are not working. I tried changing the clock PPM to 250, 500, none are working.

I programmed the softdevice first by running `make flash_softdevice`, then programmed the application by running `make flash`.

What I am doing wrong? Any help would be appreciated.

[Draco]

I think "make flash_softdevice" and "make flash" only write the softdevice and application respectively, and do not touch the MBR because they call "nrfjprog --sectorerase". If MBR contains garbage, it will prevent the board from booting up.

Is my assessment correct?

[JONATHAN LL]

Hi,

Doing a erase or recover of the device and then program it again is often the solution if it at first does not seem to work.

> nrfjprog -e
> make flash_softdevice
> make flash

This way you can make sure the device does not have any garbage left that can interfere. 

Regards,
Jonathan