Is it possible to program the nRF52840 dongle using the nRF52832-DK using SWD?

[User_0211]

Hello DevZone,

I have recently received the nRF52840 Dongle  and I'm able to program it properly with the nRFConnect App. However, when I try to program it with the nRF52832 DK it just enters in bootloader mode, I believe that the SWD is attempting to erase some protected part of the flash (the part that has the bootloader), I don't know. 

Besides that, when  I tried to do the erase command on the dongle all leds are off and I cannot communicate with the nRF52840 at all, not through the nRFConnect neither the SWD. Any idea what is the problem? 

I'm using the examples for the PCA10059 from the SDK_15.2.0

Thank you in advance! 

[AndreasF]

Hi.

Have you tried to recover the nRF52840 DK and Dongle?

Try: nrfjprog.exe --recover --log

This will create a log file located in the folder you run the cmd from.

- Andreas

[User_0211]

I am not using that DK, instead, I am using the nRF52832 DK. Is it possible to program the nRF52840-dongle with the nRF52832-DK?

[AndreasF]

Hi.

Yes, but it is really important that the voltage on the nRF52840 Dongle matches the nRF52832 DK.

The safest way would be for you to solder a ARM Cortex JTAG SWD 10pin Connector onto footprint P1.

Like this:

And then use a 10-pin 2x5 1.27 mm pitch cable, like this one, to connect the nRF52840 Dongle to the nRF52832 DK

Like this:

Then you simply put the USB into a USB-port, like this:

You should then be able to program the Dongle from the nRF52832 DK. More information can be found here.

- Andreas

[User_0211]

I tried using the SWD pins instead of the P1 connector and connecting both GND

But it hasn't worked so far.

[AndreasF]

Hi.

There shouldn't be any difference, it should also work, did you try what I proposed?

- Andreas