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.. _lfs:
==============
littlefs
==============
littlefs is a little fail-safe filesystem designed for microcontrollers.
Detailed introduction: https://github.com/littlefs-project/littlefs
Usage
-----
Enable :c:macro:`LV_USE_FS_LITTLEFS` and define a :c:macro`LV_FS_LITTLEFS_LETTER` in ``lv_conf.h``.
When enabled :c:macro:`lv_littlefs_set_handler` can be used to set up a mount point.
Example
-------
.. code:: c
#include "lfs.h"
// configuration of the filesystem is provided by this struct
const struct lfs_config cfg = {
// block device operations
.read = user_provided_block_device_read,
.prog = user_provided_block_device_prog,
.erase = user_provided_block_device_erase,
.sync = user_provided_block_device_sync,
// block device configuration
.read_size = 16,
.prog_size = 16,
.block_size = 4096,
.block_count = 128,
.cache_size = 16,
.lookahead_size = 16,
.block_cycles = 500,
};
// mount the filesystem
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err) {
lfs_format(&lfs, &cfg);
lfs_mount(&lfs, &cfg);
}
lv_littlefs_set_handler(&lfs);
API
---
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