69 typedef struct _lv_fs_drv_t {  struct
72     bool (*ready_cb)(struct _lv_fs_drv_t * drv);  argument
74     void * (*open_cb)(struct _lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode);  argument
75     lv_fs_res_t (*close_cb)(struct _lv_fs_drv_t * drv, void * file_p);  argument
76 …lv_fs_res_t (*read_cb)(struct _lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_…  argument
77 …lv_fs_res_t (*write_cb)(struct _lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, …  argument
78 …lv_fs_res_t (*seek_cb)(struct _lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t when…  argument
79     lv_fs_res_t (*tell_cb)(struct _lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);  argument
81     void * (*dir_open_cb)(struct _lv_fs_drv_t * drv, const char * path);  argument
82     lv_fs_res_t (*dir_read_cb)(struct _lv_fs_drv_t * drv, void * rddir_p, char * fn);  argument
83     lv_fs_res_t (*dir_close_cb)(struct _lv_fs_drv_t * drv, void * rddir_p);  argument