nRF9160 Working procedure for MCUBoot loader upgrade

[kk2mkk]

Hi,

I am looking for a working example for upgrading the MCUBoot itself when we have the configuration B0+MCUBoot+APP, especially wrt to SLM application.

I have gone through some literature https://docs.zephyrproject.org/latest/samples/subsys/mgmt/mcumgr/smp_svr/README.html but there is no straight forward method doing it on a DK board.

regards

KK

[Carl Richard]

Hello!

If you want to update/upgrade MCUBoot, along with the rest of the app it should be sufficient to flash an MCUBoot enabled application(CONFIG_BOOTLOADER_MCUBOOT=y) to the device using a debugger. The DK already has a debugger built in, so programming the device normally with the <project_root>/build/zephyr/merged.hex file should be enough.

Or are you talking about DFU of the bootloader itself?

Best regards,
Carl Richard

[kk2mkk]

Hi,

I am looking for serial DFU of MCUboot itself.

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_bootloader.html#ug-bootloader

regards

KK

[Carl Richard]

Hi, KK!

I'm working on a simple demonstration for you. Hopefully done tomorrow.

Best regards,
Carl Richard

[kk2mkk]

Sure, i will wait

[Carl Richard]

Hi again. 

I've been working back and forth with this, but when asking the developers I got back that there currently isn't possible to perform serial DFU of MCUBoot. The device management subsystem of Zephyr is not enabled this when you have a b0+MCUBoot+app configuration, as explained by shibshab in your previous case about bootloader configuration on the nRF9160.

We recommend using the AWS FOTA sample for this functionality (or the http_application_update sample, modified to use RAM-buffers for the update file path).

My apologies if this doesn't match well with your specifications.

Best regards,
Carl Richard

[Carl Richard]

I will have another talk with the developers and see if we can make this possible. I'll come back with and update soon.

Thank you for the patience.

Best regards,
Carl Richard