DFU UART nrf52840

RE: DFU UART nrf52840

thang47 — Mon, 17 Jul 2023 07:36:26 GMT

Thank you for your answer. I did DFU over UART. I follwed the test code from the zephyr reporitory in nRF Connect SDK: https://github.com/nrfconnect/sdk-zephyr/blob/main/tests/subsys/dfu/mcuboot_multi/src/main.c#L83

Thank you very much!

RE: DFU UART nrf52840

AHaug — Wed, 12 Jul 2023 08:14:45 GMT

Hi,

Can you verify the following: You want to use another mcu to transfer an update file over uart to a nRF52840 that is the update target? If that is the case, then I still will recommend that you have a look at the samples I mentioned and the sample Einar mentioned w.r.t. how to do this with uart and then merge the samples. Use the client smp ble sample and the smp uart sample to merge what you wish to have.

[quote user=""]As far as I understand the time 5-7s it system is looking for a new firmware version but it can't. I do not understand why?[/quote]

To learn more about what is happening in this period you should enable bootloader logging. Look up mcuboot log in https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html to see what is relevant for you

[quote user="thang47"]As far as I know, there are 2 slots, slot0 and slot1. Slot0 is the part the device will boot, and slot1 is for updating. I tried writing the bin file to slot1, but I don't know how to switch between the 2 slots.[/quote]

I strongly recommend that you get familiar with the samples written in the repository that both Einar and I have linked you before you write your own custom DFU procedure. There are more than two slots in the partitioning of the project, but there are only 2 slots dedicated to the application and the uppdate of the application (if you have dfu support). Once again, see https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples for a general overview of the theory regarding application slots.

[quote user="thang47"]I followed the example:github.com/.../main.c[/quote]

This is not an example, but rather test code from the zephyr reporitory in nRF Connect SDK. Don't use this. Use the samples in the repository we've linked before you create something custom.

Kind regards,
Andreas

RE: DFU UART nrf52840

thang47 — Wed, 12 Jul 2023 03:49:10 GMT

Hi AHaug,

Thank you for your answer.

But I want to update the firmware of on nRF52840DK over UART. I try use TeraTerm application on my computer to transfer bin file update, nRF52840DK connect my computer over UART.

As far as I know, there are 2 slots, slot0 and slot1. Slot0 is the part the device will boot, and slot1 is for updating. I tried writing the bin file to slot1, but I don't know how to switch between the 2 slots.
I followed the example:github.com/.../main.c

RE: DFU UART nrf52840

AHaug — Mon, 10 Jul 2023 13:13:07 GMT

Hi,

Einar is on vacation so I've taken over this case for him for now. If you wish to do DFU between two devices I recommend you to have a look at this repository: https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples/client_smp/smp_client_ble which is based on Add DFU support to your application

This sample shows how to update the firmware of one nRF52840DK from another nRF52840DK

Kind regards,
Andreas

RE: DFU UART nrf52840

thang47 — Fri, 07 Jul 2023 07:25:17 GMT

Hi,

Currently I want to use another MCU to transfer the bin file to update the firmware for my nrf52840.I followed the example of this link: devzone.nordicsemi.com/.../350127. But it doesn't work

RE: DFU UART nrf52840

Einar Thorsrud — Mon, 03 Jul 2023 12:12:05 GMT

Hi,

MCUBoot and SMP server is supported out of the box in Zephyr and the nRF Connect SDK, so I would suggest looking at that. There is the official SMP server sample from Zephyr, but I would suggest also looking at this set of bootloader samples that a colleague of me made, which have simple samples for various use cases, including UART/serial DFU (both serial recovery and SMP).