Using NRF9160 with Flash Circular Buffer (FCB)

[ubieda]

Hey, everyone.

I am currently working with NRF9160, NCS V1.3.0, developing code for an application that requires periodically storing  important information in flash, and send the accumulated information whenever possible. I looked through the Zephyr libraries and came across with Flash Circular Buffer (FCB) and seems perfect for this use-case. 

I could not find an example code of its usage, though; I tried to put together a simple code following API instructions and fcb_init() returns negative error code (-EIO): I attempted to use "storage" partition. 

Could anyone, please, provide some guidance on how to use this library with the NRF9160 flash partitions?

Thanks in advance, 
Luis.

[Simon]

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

[ubieda]

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.