RE: Does the MCUMGR have a foolproof feature?

Yoshihiro Goto — Wed, 10 Jul 2024 08:14:48 GMT

Hello,

My apologize, I was confusing recovery mode from mcuboot and DFU over USB. I was overwriting firmware in recovery mode.

https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-2-dfu-over-usb-adding-external-flash/

I followed the instructions on the above page to perform a USB DFU and was able to upload to slot 1.

Best Regards,
Yoshihiro Goto

RE: Does the MCUMGR have a foolproof feature?

Amanda Hsieh — Tue, 09 Jul 2024 16:59:38 GMT

Hi,

The bootloader will skip the invalid image and boot the valid image in the other slot if using the dual-slot configuration. If using the recovery mode with the single-slot configuration, you could upload the correct image again.

[quote user=""]- I don't know how to write to slot 1. Adding -n1 options doesn't work.[/quote]

Which sample are you using? Are you using external flash? Could you post the command you are using?

The doc said:

The mcumgr image upload command may be provided optional -e -n <image> parameter that will select target image for upload; when parameter is no provided, 0 is assumed, which means “default behaviour”, and it performs upload to the “image-1”, the MCUboot secondary slot.

Try to upload without -e -n <image> parameter to see if it can work or not.

Regards,
Amanda H.