LITTLEFS
A little fail-safe filesystem designed for microcontrollers from https://github.com/littlefs-project/littlefs.
In NuttX, littlefs can be interacted with through the virtual file system. This
means that it can be used normally with read()
, write()
, etc. calls, as
well as file operations (fopen()
, fclose()
, etc).
Note
Since littlefs is power-fail safe and must commit writes before they are
permanently stored (corruption prevention mechanism), it is required to
periodically call fsync
on the file to commit your writes. The exact
semantics of when littlefs files are committed are discussed in this issue.
..note:
If your littlefs setup is experiencing crashes when you boot, try
troubleshooting by tweaking the ``BLOCK_SIZE_FACTOR`` options in Kconfig. A
factor of 4 works well for SD cards.
Warning
The littlefs support on NuttX only works with mtd drivers, for storage devices such as flash chips, SD cards and eMMC. Performance on SD cards and eMMC devices is worse than flash.