External flash with LittleFS & FOTA

RE: External flash with LittleFS & FOTA

Simonr — Tue, 18 Feb 2025 09:15:55 GMT

Thanks Nils

My colleague Sigurd will follow up your private ticket. I've already discussed your predicament with him and he's written the lesson in Devacademy referred to here, so you are in good hands.

Best regards,

Simon

RE: External flash with LittleFS & FOTA

NilsDR — Mon, 17 Feb 2025 13:26:25 GMT

I'm still getting negative addresses and instant crash, however, following https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-3-dfu-with-external-flash/ i got something to work, but without the pm_static.yml and on the nrf9160DK board, not on my custom board. I want to share my project with you so I've created a private ticket with id: 340856. Let us continue there.

Best regards,
Nils

RE: External flash with LittleFS & FOTA

Simonr — Fri, 14 Feb 2025 11:04:31 GMT

I discussed this case with a colleague, and I think he hit the nail on the head here: Try setting the SB_CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK from here https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_sysbuild.html to make sure the sysbuild gets to do the external driver check.

Additionally, last week we released a DevAcademy lesson on sysbuild available here to get more familiar with developing in sysbuild. https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-sysbuild/

Best regards,

Simon

RE: External flash with LittleFS & FOTA

NilsDR — Tue, 11 Feb 2025 06:54:46 GMT

Hi Simon,

Apologies for any confusion in my previous message. I recently updated my main project from 2.4.0 to 2.9.0, but before integrating the external flash and FOTA, I wanted to test them separately. For this, I used the jesd216 example from the 2.9.0 toolchain.

The issue appeared when I added the pm_static.yml file—after that, the application stopped working. As I mentioned in my post, I suspect this might be related to the flash addresses. Some seem to have negative sizes, and I also noticed that the external flash doesn’t start at 0x0000000 but instead at 0x1000000.

Do you have any insights on this?

Thanks,
Nils

RE: External flash with LittleFS & FOTA

Simonr — Fri, 07 Feb 2025 08:39:54 GMT

At what step here did the application stop working exactly? You say you've both added the file system with partitions and moved from NCS 2.4.0 to 2.9.0. I think we should go step by step here to figure out what caused this hardfault in the first place.

For moving from an older NCS version to the latest (2.4.0 to 2.9.0 for example). Please check out the migration guides for 2.5.0, 2.6.0, 2.7.0, 2.8.0 and 2.9.0 here. We also have a migration guide from multi-image builds to sysbuild here that should walk you through moving from multi-image to sysbuild.

Best regards,

Simon