Using NRF9160 with Flash Circular Buffer (FCB)

RE: Using NRF9160 with Flash Circular Buffer (FCB)

bringert — Thu, 16 Jan 2025 13:20:35 GMT

Found another possible example: nrf_modem_lib/trace_backends/flash/flash.c

RE: Using NRF9160 with Flash Circular Buffer (FCB)

bringert — Thu, 16 Jan 2025 11:17:59 GMT

Maybe settings_fbc.c is a better example of how to use FCB? Just started looking at it myself.

RE: Using NRF9160 with Flash Circular Buffer (FCB)

icedfluid — Wed, 08 Jan 2025 09:16:49 GMT

Same problem here. FIVE years later still no example how to use FCB.
Digging into "tests code" to understand how it works does not help to be effective under Zephyr coding.

RE: Using NRF9160 with Flash Circular Buffer (FCB)

grzegorz — Sat, 23 Mar 2024 14:01:23 GMT

Hello Simon A lot of time has passed but there is still no example how to use FCB. There is no sample for FCB. There are tests but they are not very clear. There is also a ridiculus statement in documentation:

The following data structure describes the FCB itself. First part should be filled in by the user before calling fcb_init. The second part is used by FCB for its internal bookkeeping.

But which part is first and which is second? It isn't described anywhere. How should I set f_sector_cnt, f_scratch_cnt, f_sectors? Fields in struct fcb have shorts description, but they also don't provide information about optimal settings.

RE: Using NRF9160 with Flash Circular Buffer (FCB)

NickH — Thu, 27 Apr 2023 15:05:43 GMT

Hi - the link no longer works and there is no longer any \fcb\ directory under \subsys\fs - any other pointers?

RE: Using NRF9160 with Flash Circular Buffer (FCB)

ubieda — Fri, 24 Jul 2020 20:12:30 GMT

Hey, Simon.

I already checked the FCB sample code, thanks for pointing it out. I have not dug into its deep-detailed implementations, but I see they disable MPU and set some other configurations that do not seem ideal for a non-secure application in the NRF9160. We've used NVS before and since it has worked well for us, we will move forward with it.

Best regards,
Luis.

RE: Using NRF9160 with Flash Circular Buffer (FCB)

Simon — Thu, 09 Jul 2020 22:30:10 GMT

Take a look at ncs\v1.3.0\zephyr\tests\subsys\fs\fcb\src\main.c, which may give you some guidance on how to use the Flash Circular Buffer library.

It may also be worth taking a look at the NVS library and the sample ncs\v1.3.0\zephyr\samples\subsys\nvs\src\main.c

Best regards,

Simon