USB DFU using AuTerm Unable to switch between images in two slots

RE: USB DFU using AuTerm Unable to switch between images in two slots

Shuhao Dong — Tue, 08 Apr 2025 19:28:08 GMT

Thank you. I have decided to use dfu-util command line to with DFU USB class rather than mcumgr.

RE: USB DFU using AuTerm Unable to switch between images in two slots

Sigurd Hellesvik — Fri, 04 Apr 2025 12:41:13 GMT

[quote user="Shuhao Dong"]But if I do want to add that feature in the future, I am programming using an external debugger on nrf5340dk. COuld you please suggest any solution to that? [/quote]

If you want to program Serial Recovery later, see https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/

RE: USB DFU using AuTerm Unable to switch between images in two slots

Shuhao Dong — Thu, 03 Apr 2025 16:21:25 GMT

Hi Sigurd, I abandoned the AuTerm method and changed to dfu-util command line tool. Sorry to make it unclear before, but I do not want to use USB serial recovery. I only want to use USB DFU from application. Right now, I can confirm I could be able to update application core using dfu-util with zephyr.signed.bin. And after enabling

CONFIG_USB_DFU_PERMANENT_DOWNLOAD=y
CONFIG_USB_DFU_REBOOT=y

, it seems like the device will automatically reboot and swap and confirm the new image. I have not yet tried to upgrade both cores using dfu-util.

For the second question, since I am not using USB serial recovery, the size of mcuboot partition is large enough. But if I do want to add that feature in the future, I am programming using an external debugger on nrf5340dk. COuld you please suggest any solution to that? Many thanks.

RE: USB DFU using AuTerm Unable to switch between images in two slots

Sigurd Hellesvik — Tue, 01 Apr 2025 11:21:23 GMT

Aha, I missed that you were doing Serial Recovery.

I suggest that you start by trying to only DFU to application core. Does that work?

[quote user="Shuhao Dong"]Another question is, if I want to enable serial recovery over USB, the size of my MCUboot parition is restricted by a static partition yaml file comes with zephyr, how can I increase the size of MCUboot partition size? I have tried to use the partition output file from my nrf5340dk's build, is this a valid approach? Thank you![/quote]

It depends, do you program the Thingy with an external debugger or not?

RE: USB DFU using AuTerm Unable to switch between images in two slots

Shuhao Dong — Mon, 31 Mar 2025 10:17:13 GMT

Thank you Sigurd. I have configured a secondary slot in my sysbuild.conf using: SB_CONFIG_MCUBOOT_MODE_SINGLE_APP=n and in the mcuboot.conf using: CONFIG_SINGLE_APPLICATION_SLOT=n. So do I have to use external flash for MCUboot?

Another question is, if I want to enable serial recovery over USB, the size of my MCUboot parition is restricted by a static partition yaml file comes with zephyr, how can I increase the size of MCUboot partition size? I have tried to use the partition output file from my nrf5340dk's build, is this a valid approach? Thank you!

RE: USB DFU using AuTerm Unable to switch between images in two slots

Sigurd Hellesvik — Mon, 31 Mar 2025 09:55:37 GMT

Hi,

[quote user=""] "signed_by_mcuboot_and_b0_ipc_radio.bin" file with the Test option[/quote]

Netcore DFU does not support Reverting. Use "Confirm" instead of "Test".

[quote user=""] But from the terminal output, I can see an error and two inf log outputs as shown: [/quote]

This is typically due to not found secondary slot in MCUboot, usually external flash.

Are your external flash set up properly for MCUboot?

See https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-5-fota-over-bluetooth-low-energy/ for a guide (At the bottom is a section for the nRF5340.

Regards,
Sigurd Hellesvik