RE: Enter MCUboot from firmware (nRF9160)

Håkon Alseth — Tue, 08 Feb 2022 12:44:50 GMT

Hi,

[quote user=""]maybe it is a very simple question but I din't figured out the answer yet. Is it possible to start MCUboot from the application firmware code (to avoid pressing a certain button while power off/on the device)? I am using NCS connect SDK and on my device runs MCUboot and Zephyr OS. MCBboot works and is tested well (button press while power cycle).[/quote]

The mcuboot serial recovery must include a specific physical routine to enter recovery mode.

However, if your application has smp_svr registered, you can handle the new image in your application, including test running the new one. See here for detailed information on how to run this sample:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/subsys/mgmt/mcumgr/smp_svr/README.html

Note: for nrf9160dk_nrf9160ns, please increase the "CONFIG_HEAP_MEM_POOL_SIZE=2048" to be able to successfully receive the uart payloads.

[quote user=""]If I trigger a soft reset (SYS_REBOOT(0)) while pressing the button it will not enter MCUboot. Only a real power cycle starts MCUboot. What am I doing wrong or what I have missed?[/quote]

mcuboot will run after a soft-reset, but it will not be directly triggered unless there is an active change pending.

Kind regards,

Håkon