NVS data lost after MCUBoot bootload

RE: NVS data lost after MCUBoot bootload

hjetschko — Tue, 30 May 2023 02:07:02 GMT

Hi Andreas

Thank you for the link. I looked through the source code and made the following changes:

Copied pm_static.yml from the example in the link you sent into our source code
Changed:
#define NVS_PARTITION storage_partition
to:
#define NVS_PARTITION custom_nvs_storage

It looks like this moves the NVS storage location a bit higher up in flash and out of reach of MCUBoot. All the settings are preserved after a bootload. Thanks again for your help with this.

Regards
Hubert

RE: NVS data lost after MCUBoot bootload

AHaug — Thu, 25 May 2023 13:43:28 GMT

Hi,

Initial investigation makes it look like everything is set up correctly and whatever is in the NVS partition should be persistent in between DFU. Unfortunately I will have to investigate the Zephyr sample and your project some more before I can find anything conclusive for you.

In the meanwhile, I have something constructive for you. A colleague of mine has answered a similar case in RE: Setting and using NVS and BT Settings with Static Partition Manager. Here you will also find a sample in the final reply which should do what you're aiming to do. Unfortunately it is not a minimal sample, so you will have to do some dissecting to find the differences. The sample is based on the peripheral_hr sample with bootloader, Bluetooth and a custom NVS partition

Let me know if this other thread solves your issue

Kind regards,
Andreas

RE: NVS data lost after MCUBoot bootload

hjetschko — Wed, 24 May 2023 21:13:32 GMT

Hi Andreas

Thank you, I appreciate your help.

RE: NVS data lost after MCUBoot bootload

AHaug — Wed, 24 May 2023 12:37:55 GMT

Hi,

I've picked up your case and will be working on providing you an answer as soon as possible. Hopefully within tomorrow.

Apologies for the inconvenience

Kind regards,
Andreas