RE: mcuboot + dfu-util on nrf52840

ZL_Chiu — Tue, 28 Nov 2023 04:53:05 GMT

Hi Viresh:

maybe you can try "sudo dfu-util -l" in ubuntu system

RE: mcuboot + dfu-util on nrf52840

Einar Thorsrud — Thu, 23 Nov 2023 14:27:22 GMT

Hi Viresh,

[quote user=""]what changes do i need to make to my prj.cnf and mcuboot.cnf file so that it works with dfu-util?[/quote]

I do not believe dfu-util supports acting as an SMP client, so that will not work as far as I can understand. That is for a completely different DFU protocol.

[quote user=""]I tried running the example application in: zephyr/samples/subsys/usb/dfu/ , but when i set CONFIG_BOOTLOADER_MCUBOOT=y , I don't see a merged.hex file getting generated so I am assuming the example is not working the way it is supposed to? I am building the application using nfrconnect extension on VS code. Is there anything I am not doing correctly?[/quote]

I don't know what you are doing so I cannot say.

[quote user=""]Is mcumgr not recommended for production applications?[/quote]

We generally only provide desktop tools for development, and not production use. In addition to using mcumgr you can use nrfutil, which supports performing MCUboot serial recovery if you prefer that. If you need a production grade desktop tool for performing DFU (meaning something your end customers will use), that would be up to you to either develop it or validate that mcumgr or whichever solution you end up with works well enough for your specific use case.

[quote user=""]is dfu-util not compatible/recommended for nrf52840 chips (its mounted on my custom board)? I ask this because I was going over your one of the tickets (https://devzone.nordicsemi.com/f/nordic-q-a/103932/i-m-trying-to-perform-usb-dfu-with-nrf-connect-sdk-ver2-4-2-but-an-error-occurs-with-duf-util ) and it sounded like your support tech was recommending using mcumgr over dfu-util? [/quote]

It is not compatible and not supported.

[quote user=""]can you please point me to any example that talks about configuring app for DFU? I have gone through the existing examples, and most/all of them use mcumgr for dfu[/quote]

You may find the examples my colleague have put here (with good descriptions) useful for getting started with DFU.

[quote user=""]Is there a recommended procedure/application that you recommend for a reliable DFU for nrf52840 chips, running zephyr application and using mcuboot. once its in production and out to the world? [/quote]

We don't provide any other tools than mentioned earlier in this case for serial DFU. If you need something else, you will have to develop that yourself. Generally, we only provide development tools for Desktop. (We do whoever provide DFU libraries for OTA for iOS and Android).