The f_opendir function opens a directory.
FRESULT f_opendir ( DIR* DirObject, /* Pointer to the blank directory object structure */ const TCHAR* DirName /* Pointer to the directory name */ );
FR_OK, FR_DISK_ERR, FR_INT_ERR, FR_NOT_READY, FR_NO_PATH, FR_INVALID_NAME, FR_INVALID_DRIVE, FR_NOT_ENABLED, FR_NO_FILESYSTEM, FR_TIMEOUT, FR_NOT_ENOUGH_CORE
The f_opendir function opens an exsisting directory and creates the directory object for subsequent calls. The directory object structure can be discarded at any time without any procedure.
Available when _FS_MINIMIZE <= 1.