Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

GiorgioG — Sat, 24 May 2025 12:59:00 GMT

I have a similar problem

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

MarkV6 — Fri, 29 Mar 2024 12:20:50 GMT

This topic of 2 years ago seems to be still actual. This happens on my 5340 SDK 2.6.0. The external flash stops functioning when CONFIG_BT=y

The solution above is unclear to me or is the pm_static.yml renamed now? How to solve this?

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

jodiem — Tue, 09 Aug 2022 18:16:24 GMT

Sorry, I was on vacation last week and did not get to investigate this until now.

So the issue was that I did not have the pm_static.yml, and added a line to the "chosen" section of the app.overlay.

pm_static.yml:

littlefs_storage:
address: 0
end_address: 0x800000
placement:
before:
- end
region: external_flash
size: 0x800000

Modification of the app.overlay:

diff --git a/app.overlay b/app.overlay
index 3d289d8..9cf4d83 100644
--- a/app.overlay
+++ b/app.overlay
@@ -6,6 +6,7 @@

/ {
chosen {
+ nordic,pm-ext-flash = &mx25r64;
nordic,nus-uart = &uart0;
};
};

Thanks for your assistance!

Jodie

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

Maria Gilje — Mon, 01 Aug 2022 14:01:47 GMT

Hello Jodie,

1. nRF Connect SDK v2.0.0 and Zephyr SDK v3.0.99 are compatible. The partition manager should function correctly and take child images into account as well.

2. The pull request was for the latest state of development, not for v2.0.0, so I suggest you edit the files in your local repository.

3. I can't provide you with an exact release date, but it is under evaluation, and should be included in an upcoming release of NCS.

[quote user="jodiem"]I have merged https://github.com/nrfconnect/sdk-nrf/pull/7927 locally into the nrf_sdk directory. This has caused other issues I needed to checkout the main branch for both the nrf and the zephyr... which cause more build issues.[/quote]

If you need any assistance to figure out your new issues, I am happy to help.

BR,

Maria

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

jodiem — Fri, 29 Jul 2022 19:10:38 GMT

Hello Maria,

Thanks for looking into this.

Just for clarification:

1. Is there a limitation using Version 2.0.0 nrf_sdk with the v3.0.99-ncs1 to share the partition manager with the child image?

2. Should I Just look at Pull 7927 and modify the v2.0.0 branch ... Instead of merging it.

3. Is there a planned release of the SDK with pull 7927?

I have merged https://github.com/nrfconnect/sdk-nrf/pull/7927 locally into the nrf_sdk directory. This has caused other issues I needed to checkout the main branch for both the nrf and the zephyr... which cause more build issues.

Thanks,

Jodie

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

Maria Gilje — Fri, 29 Jul 2022 12:48:27 GMT

Hello again jodiem,

[quote user=""]The example code will NOT use the qspi flash if I add "CONFIG_BT" to the prj.conf[/quote]

The cause for this is setting CONFIG_BT=y on the nRF5340 will implicitly cause the child image hci_rpmsg to be built for the network core. The existence of a child image again invokes the partition manager which will cause the flash partitions set in the devicetree to be ignored. This reply to an older case contains further explanation and some useful links. A more recent reply in the same case contains a sample which demonstrates statically defining the flash partitions.

This pull request also provides a partial solution to your issue.

I hope some of this information may be of help to you.

Best regards,

Maria

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

Maria Gilje — Thu, 28 Jul 2022 06:46:28 GMT

Hello jodiem,

Just letting you know that I am looking into this, and I will get back to you soon.

Kind regards,

Maria

Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

pm_static.yml:

Modification of the app.overlay:

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs **NOT** use external flash.

Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.

RE: Enabling Bluetooth to the Littlefs sample app will make the littlefs NOT use external flash.