nRF5340 - using NVS and LittleFS

[garrettb]

Hi

I can run the sample application for NVS, on the nF5340 DK (SDK 2.9.0)

I can run the sample application for LittleFS, also on the nRF5340 DK

Now I would like to see if I can use both, and share the flash partition - maybe 50/50.

Is this possible.

I read Case ID: 257332 but that is from a few years back.

I tried to set up an overlay and split the partition but I ran in to lots of issues.

Regards

Garrett

[Hung Bui]

Hi, 
Please try to recover the network core by using: 
nrfjprog --recover --coprocessor CP_NETWORK

You may want to recover the application core as well
nrfjprog --recover --coprocessor CP_APPLICATION

Which error do you have when you enable both NVS and LittleFS  ? 
Have you defined a parttition for littlefs ? You can make a pm_static.yml file (copy from a partitions.yml in build folder in littlefs sample for example, and modify it as you wish) to force a partition configuration. You can find the use of pm_static.yml in \nrf\applications\nrf_desktop\configuration\nrf52kbd_nrf52832 for example. 
It should be in the project folder. 

[garrettb]

I have it working now.

I just have a basic version working which uses the code from the NVSA and the LittleFS sample applications.

My prj.conf file includes these settings:

CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_SETTINGS=y
#CONFIG_REBOOT=y


CONFIG_NVS=y
CONFIG_NVS_LOG_LEVEL_DBG=y
CONFIG_MPU_ALLOW_FLASH_WRITE=y

CONFIG_MAIN_STACK_SIZE=4096
CONFIG_LOG_MODE_MINIMAL=y
CONFIG_FILE_SYSTEM=y
CONFIG_FILE_SYSTEM_LITTLEFS=y

My pm_static.yml:

user_littlefs_storage:
address: 0xfc000
size: 0x2000
end_address: 0xfe000
placement:
before:
- end
region: flash_primary
user_nvs_storage:
address: 0xfe000
size: 0x2000
end_address: 0x100000
placement:
before:
- end
region: flash_primary

So now I can use both, it seems.

One thing I don't understand.

If I am correct, this storage area is also used by Bluetooth, for storig pairing/bonding and other information.
Is this correct?
If so, how much of this storage area is it safe to re-assign to either NVS or LittleFS?