Hardware SPI DFU from one nRF52840 to another nRF52840.

RE: Hardware SPI DFU from one nRF52840 to another nRF52840.

Viral Patel — Wed, 17 Jul 2024 13:12:15 GMT

Hi Kevin,

I am planning to implement the same thing, were you able to implement this with any samples or other protocols?

Thank you,

Viral

RE: Hardware SPI DFU from one nRF52840 to another nRF52840.

kfci-eng — Tue, 23 Apr 2024 15:49:29 GMT

Hi Marte,

Thanks! I will follow that recommendation and use the DFU target library directly, I have been reading the API documentation. I appreciate your help!

Best regards,

Kevin

RE: Hardware SPI DFU from one nRF52840 to another nRF52840.

Marte Myrvold — Thu, 04 Apr 2024 09:25:02 GMT

Hi Kevin,

The method I mentioned in my previous reply uses mcumgr-lib. In this case, you must implement the transport for both the SMP client and the SMP server. I would recommend taking a look here: https://github.com/nrfconnect/sdk-zephyr/tree/main/subsys/mgmt/mcumgr/transport. Additionally, you can also look at this unofficial sample: https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/v2.2.0/bootloader_samples/client_smp/smp_client_uart. It is a modified version of the sample in my previous reply, and it uses UART instead of Bluetooth as transport.

The other option is to use the DFU target library. With this, you can implement the SPI however you like on the client and use the DFU target library on the server side to handle the image received over SPI.

Best regards,
Marte

RE: Hardware SPI DFU from one nRF52840 to another nRF52840.

kfci-eng — Thu, 28 Mar 2024 18:05:21 GMT

Hi Marte,

Thank you for your reply. I went over the sample but it is challeging to me to understand how I could modify or change the sample to use SPI as the transport layer. Is there any sample that performs DFU from one DK to another using Hardware UART (No USB, shell, etc). I think that would be very helpful. I have been looking on the devzone and on the ncs github but haven't found any.

Best,

Kevin

RE: Hardware SPI DFU from one nRF52840 to another nRF52840.

Marte Myrvold — Tue, 26 Mar 2024 12:18:26 GMT

Hi Kevin,

It should be possible to perform DFU over SPI, but we do not have any guides or information on how to do this. One option is to use SMP and implement the SPI transport layer yourself, but this will require work on your side.

A colleague has made some unofficial bootloader samples that you can take a look at: https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples. You can find examples of performing DFU from one nRF52840 DK to another using BLE there. The samples use the Zephyr mcumgr driver for transport, so you would only need to implement the SPI transport layer once. Please note that these examples are unofficial and provided as-is.

Best regards,
Marte