DFU from external Flash - nRF Connect SDK - swap

RE: DFU from external Flash - nRF Connect SDK - swap

Håkon Alseth — Fri, 27 Aug 2021 11:29:24 GMT

Only you have the permission to convert a case from private to public.

Kind regards,

Håkon

RE: DFU from external Flash - nRF Connect SDK - swap

Lorenzo Amicucci — Fri, 27 Aug 2021 11:23:12 GMT

ok, we can close it. Can you make it public?

Thanks

RE: DFU from external Flash - nRF Connect SDK - swap

Håkon Alseth — Fri, 27 Aug 2021 11:22:02 GMT

Happy to help out.

[quote user="nLorami"]So basically you confirm that we can go back to the old image, also when on external flash. [/quote]

yes, you can.

Kind regards,

Håkon

RE: DFU from external Flash - nRF Connect SDK - swap

Lorenzo Amicucci — Fri, 27 Aug 2021 11:16:48 GMT

Ok, thanks.
So basically you confirm that we can go back to the old image, also when on external flash.

RE: DFU from external Flash - nRF Connect SDK - swap

Håkon Alseth — Fri, 27 Aug 2021 11:04:45 GMT

Hi Lorenzo,

The mcuboot documentation will cover most of their questions:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/mcuboot/design.html#image-slots

They effectively swap place, then the new image will be executed from primary slot and once "boot_write_img_confirmed()" is called, it will be verified.

If this function is not called, then the image will be reverted upon reset (ie. back to old image).

Kind regards,

Håkon