# lv_fsdrv.h (/api/libs/fsdrv/lv_fsdrv_h)
Functions [#functions]
lv_littlefs_set_handler [#lv_littlefs_set_handler]
Set the default LittleFS handler to be used by LVGL
```c title=" " lineNumbers=1
void lv_littlefs_set_handler(struct lfs *lfs)
```
Parameters
| Name | Type | Description |
| ----- | -------------- | ------------------------------------------------------- |
| `lfs` | `struct lfs *` | pointer to an initialized LittleFS filesystem structure |
lv_fs_fatfs_init [#lv_fs_fatfs_init]
```c title=" " lineNumbers=1
void lv_fs_fatfs_init(void)
```
lv_fs_stdio_init [#lv_fs_stdio_init]
```c title=" " lineNumbers=1
void lv_fs_stdio_init(void)
```
lv_fs_posix_init [#lv_fs_posix_init]
```c title=" " lineNumbers=1
void lv_fs_posix_init(void)
```
lv_fs_win32_init [#lv_fs_win32_init]
```c title=" " lineNumbers=1
void lv_fs_win32_init(void)
```
lv_fs_memfs_init [#lv_fs_memfs_init]
```c title=" " lineNumbers=1
void lv_fs_memfs_init(void)
```
lv_fs_littlefs_init [#lv_fs_littlefs_init]
Initialize LittleFS file system driver
```c title=" " lineNumbers=1
void lv_fs_littlefs_init(void)
```
lv_fs_littlefs_register_drive [#lv_fs_littlefs_register_drive]
Register a LittleFS drive with LVGL
```c title=" " lineNumbers=1
lv_fs_res_t lv_fs_littlefs_register_drive(lfs_t *lfs, char letter)
```
Parameters
| Name | Type | Description |
| -------- | --------- | ------------------------------------------------------- |
| `lfs` | `lfs_t *` | pointer to an initialized LittleFS filesystem structure |
| `letter` | `char` | driver letter to register (e.g. 'A') |
**Returns:** — LV\_FS\_RES\_OK: success, LV\_FS\_RES\_INV\_PARAM: lfs is NULL or letter not in range A-Z, LV\_FS\_RES\_DRIVE\_LETTER\_ALREADY\_USED: A drive with this letter is already registered
lv_fs_arduino_esp_littlefs_init [#lv_fs_arduino_esp_littlefs_init]
```c title=" " lineNumbers=1
void lv_fs_arduino_esp_littlefs_init(void)
```
lv_fs_arduino_sd_init [#lv_fs_arduino_sd_init]
```c title=" " lineNumbers=1
void lv_fs_arduino_sd_init(void)
```
lv_fs_uefi_init [#lv_fs_uefi_init]
```c title=" " lineNumbers=1
void lv_fs_uefi_init(void)
```
lv_fs_frogfs_init [#lv_fs_frogfs_init]
```c title=" " lineNumbers=1
void lv_fs_frogfs_init(void)
```
lv_fs_frogfs_deinit [#lv_fs_frogfs_deinit]
```c title=" " lineNumbers=1
void lv_fs_frogfs_deinit(void)
```
lv_fs_frogfs_register_blob [#lv_fs_frogfs_register_blob]
Mount a frogfs blob at the path prefix. If there is a file "foo.txt" in the blob and the blob is registered with `path_prefix` as "my\_blob", it can be opened later at path "my\_blob/foo.txt".
```c title=" " lineNumbers=1
lv_result_t lv_fs_frogfs_register_blob(const void *blob, const char *path_prefix)
```
Parameters
| Name | Type | Description |
| ------------- | -------------- | ------------------------------------------------------------------- |
| `blob` | `const void *` | a frogfs blob/image from mkfrogfs.py |
| `path_prefix` | `const char *` | a prefix that will be used to refer to this blob when accessing it. |
**Returns:** — LV\_RESULT\_OK or LV\_RESULT\_INVALID if there was an issue with the blob
lv_fs_frogfs_unregister_blob [#lv_fs_frogfs_unregister_blob]
Unmount a frogfs blob that was previously mounted by `lv_fs_frogfs_register_blob`. All files and dirs should be closed before calling this.
```c title=" " lineNumbers=1
void lv_fs_frogfs_unregister_blob(const char *path_prefix)
```
Parameters
| Name | Type | Description |
| ------------- | -------------- | ------------------------------------------------- |
| `path_prefix` | `const char *` | the path prefix that the blob was registered with |
Macros [#macros]
LV_FS_MAX_PATH_LEN [#lv_fs_max_path_len]
```c title=" " lineNumbers=1
#define LV_FS_MAX_PATH_LEN 256
```
Dependencies [#dependencies]