Porting LittleFs on Nicla Sense ME: nRF52832

[ijf1]

Hi,

We use nRF5 SDK v17.1.0 for custom application (bare-metal / without os). We are trying to port littlefs for External 2MB FLASH connected via QSPI.

Please let me know the configurations required and examples i can refer for the same.

Regards,

Ijaz

[ijf1]

Hi,

I have written the flash driver for SPIM interface. Tested basic functionalities like read/write/erase.

Currently working on porting littlefs. As nRF5 SDK v17.1.0 does not support LittleFS, can i assume there are no config parameters to be taken care (in sdk_config). 

To clarify it further, am i expected to port "GitHub - littlefs-project/littlefs: A little fail-safe filesystem designed for microcontrollers" completely to  nRF5 SDK v17.1.0.

Could you please clarify this. Thank you.

Regards,

Ijaz Fazily

[Sigurd]

ijf1 said:

can i assume there are no config parameters to be taken care (in sdk_config). 

Yes.

[ijf1]

Hi,

we have integrated GitHub - littlefs-project/littlefs: A little fail-safe filesystem designed for microcontrollers with the nRF5 SDK v17.1.0.

Also referred the following porting example as well,

pyrinas-ble-client/fs.c at master · pyrinas-iot/pyrinas-ble-client · GitHub

But the mounting the filesystem itself is failing. Any suggestion on this please.

Please let me know if I have missed out anything.

Regards,

Ijaz

[Sigurd]

Hi,

ijf1 said:

But the mounting the filesystem itself is failing. Any suggestion on this please.

Generally, you need to check what error-codes you get returned, and run a debug session, and find out where the error-code originated from and why.

[ijf1]

Hi Sigurd,

When I try to mount the filesystem, returns LFS_ERR_CORRUPT (-84, "Corrupted").

When I try to format and remount, returns -28 (no space left on device).

I have rechecked block device configuration and block device operations. 

Block Device Config:

.read_size = 256 bytes,
.prog_size = 256 bytes,
.block_size = 32000, (32k)
.block_count = 64, /* 2 Mbyte external flash */
.lookahead_size = 128 bytes,
.cache_size = 256 bytes,
.block_cycles = 500,

Regards,

Ijaz