Function esp_idf_sys::esp_vfs_fat_register

pub unsafe extern "C" fn esp_vfs_fat_register(
    base_path: *const c_char,
    fat_drive: *const c_char,
    max_files: usize,
    out_fs: *mut *mut FATFS,
) -> esp_err_t

@brief Register FATFS with VFS component

This function registers given FAT drive in VFS, at the specified base path. If only one drive is used, fat_drive argument can be an empty string. Refer to FATFS library documentation on how to specify FAT drive. This function also allocates FATFS structure which should be used for f_mount call.

@note This function doesn’t mount the drive into FATFS, it just connects POSIX and C standard library IO function with FATFS. You need to mount desired drive into FATFS separately.

@param base_path path prefix where FATFS should be registered @param fat_drive FATFS drive specification; if only one drive is used, can be an empty string @param max_files maximum number of files which can be open at the same time @param[out] out_fs pointer to FATFS structure which can be used for FATFS f_mount call is returned via this argument. @return - ESP_OK on success - ESP_ERR_INVALID_STATE if esp_vfs_fat_register was already called - ESP_ERR_NO_MEM if not enough memory or too many VFSes already registered