The partition of nrf5340 audio application

RE: The partition of nrf5340 audio application

Sigurd Hellesvik — Fri, 26 Jul 2024 11:17:32 GMT

You always want to use DFU in your app

=> You must use MCUboot

=> Partition manager will be enabled

=> You can use pm_static.yml

RE: The partition of nrf5340 audio application

huma — Fri, 26 Jul 2024 06:10:34 GMT

Hello Sigurd

Thank you very much!

If i want use the "partitions.yml" file to make a "pm_static.yml" to statically set partitions, should i have to let the "USE_PARTITION_MANAGER" not enabled? I need to find which configuration makes the "USE_PARTITION_MANAGER" enabled, then disable it?

Thank you very much and looking forward to your reply!

RE: The partition of nrf5340 audio application

Sigurd Hellesvik — Thu, 25 Jul 2024 10:33:25 GMT

[quote user="huma"]So does this mean that as long as I enable "USE_PARTITION_MANAGER"[/quote]

USE_PARTITION_MANAGER is not user-configurable, but set indirectly by other configurations, such as CONFIG_BOOTLOADER_MCUBOOT.

[quote user="huma"]So does this mean that as long as I enable "USE_PARTITION_MANAGER" and do not use "pm_datic. yml" to statically set partitions, there may be a situation where the partition position and size will change according to the relevant configuration of my project after each build?[/quote]

Yes.

[quote user="huma"]So may be i can use the "partitions.yml" file to make a "pm_static.yml" to statically set partitions? And if there are no issue of the size, i can modify something in this file too?[/quote]

Yes. But in my experience it is hard to change parititons manually, cause you must make sure all other partitions change accordingly.
If you for example make a partition bigger, something else have to become smaller. And the math must check out.

RE: The partition of nrf5340 audio application

huma — Thu, 25 Jul 2024 08:08:23 GMT

Hello Sigurd

Thank you!

After reading your reply, I think I understand a bit now.

So does this mean that as long as I enable "USE_PARTITION_MANAGER" and do not use "pm_datic. yml" to statically set partitions, there may be a situation where the partition position and size will change according to the relevant configuration of my project after each build?

So may be i can use the "partitions.yml" file to make a "pm_static.yml" to statically set partitions? And if there are no issue of the size, i can modify something in this file too?

Thank you very much and looking forward to your reply!

RE: The partition of nrf5340 audio application

Sigurd Hellesvik — Thu, 25 Jul 2024 07:53:40 GMT

Right, I read wrong for the file-name.

pm_static.yml will statically freeze your partitioning. When you are done with your project, you can copy build/partitions.yml to pm_static.yml, to make sure partitioning never changes (cause that could break DFU).

For a custom partition, make pm_static.yml, but only define the one partition you need.

For other partitions, use Kconfig options, as explained here.

To learn more, see our corse over at https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/multi-image-builds-and-the-partition-manager/

RE: The partition of nrf5340 audio application

huma — Thu, 25 Jul 2024 00:52:59 GMT

Hello Sigurd

Thank you very much. Your reply is very helpful to me.

You can change the pm_static.yml file though.

I also want to find the yml file, but in the project i can not find any yml files, and i have not enable the DFU, so i think the yml file in dfu folder is not enabled. I am still searching in the SDK folder, but I am still unable to determine which yml file it is, it seems that none of the yml files have been called by this project because the partitions cannot correspond one-to-one with the "partitions. yml" generated in the build folder.

Thank you very much and looking forward to your reply!

RE: The partition of nrf5340 audio application

Sigurd Hellesvik — Wed, 24 Jul 2024 13:40:42 GMT

[quote user=""]And i found that seems like the project enable the "USE_PARTITION_MANAGER", which i guess that makes the partition for flash0 in the device tree files invalid.[/quote]

Yep

[quote user=""]And I can't find where to adjust the size of these partitions. If i can, I think maybe I can reduce the sizd of app partitions appropriately.[/quote]

If you use static partitioning, it will be exactly like that. You can change the pm_static.yml file though.

[quote user=""]So if i do not want to use the external flash, what should i do now?[/quote]

You need to get the space from somewhere.

If you cannot take it from the app, try to use parts of the EMPTY_0 (this is not used for anyhing else), NVS or the setting partition.

For the last two, you should be a bit careful, but maybe you can do some tests to see how much of them are used in an example?