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