The NVS in the nCS erases the contents in DFU, is this a specification? or bug?

[Yoshihiro Goto]

As the title suggests, is this a specification? or bug? otherwise something missing in the settings?

NVS values did not vanished while nRF5 SDK used.

before DFU

after DFU

[Amanda Hsieh]

Hi, 

Please use the same pm_static.yml for FOTA. See Static partition requirement for DFU.

Regards,
Amanda H.

[Yoshihiro Goto]

Hi,

Thanks for the answer. I understand that I am missing a setting. I also read the link.

But...what exactly do I should to do?
I turned on CONFIG_PARTITION_MANAGER, but that causes a build error. (What does read-only mean?)

C:/ncs/v2.4.2/nrf/subsys/partition_manager/flash_map_partition_manager.c:12:10: fatal error: pm_config.h: No such file or directory
12 | #include <pm_config.h>

I can see that there is a partition.yml file in the existing build folder, does that mean I should move it to the root folder of the project?

[Amanda Hsieh]

Hi, 

• If you have multi-image build, it will automatically enable the Partition Manager. In your case, you are using DFU. So it should already enable MCUBoot, and then the Partition Manager would be enabled automatically. 
• Just build the project normally and then copy the partitions.yml from the build directory into the app root directory and name it pm_static.yml. 

-Amanda H.

[Yoshihiro Goto]

Hi,

Thank you for your advice.

Best Regards,
Yoshihiro Goto

[Yoshihiro Goto]

Hi,

I actually verified this. And I also confirmed that the following message appears during the build.

Partition 'mcuboot' is not included in the dynamic resolving since it is statically defined.
Partition 'mcuboot_pad' is not included in the dynamic resolving since it is statically defined.
Partition 'mcuboot_primary' is not included in the dynamic resolving since it is statically defined.
Partition 'mcuboot_primary_app' is not included in the dynamic resolving since it is statically defined.
Partition 'mcuboot_secondary' is not included in the dynamic resolving since it is statically defined.
Partition 'settings_storage' is not included in the dynamic resolving since it is statically defined.
-- Configuring done

But...

Stored values in flash memory are still lost by DFU. Am I missing some setting?

[Amanda Hsieh]

Where do you store the values? Is it in NVS?

[Yoshihiro Goto]

Amanda Hsieh said:

Where do you store the values? Is it in NVS?

I'm sure it should be...I am using nvs_write API.

>nvs_write(&fs, NVS_ID, &xxx, sizeof(xxx));