usbd_xfer_frame_len
len = usbd_xfer_frame_len(xfer, 0);
len = usbd_xfer_frame_len(xfer, n);
sc->sc_data_len[nr][i] = usbd_xfer_frame_len(xfer, i);
len = usbd_xfer_frame_len(xfer, x);
len = usbd_xfer_frame_len(xfer, x);
len = usbd_xfer_frame_len(xfer, 1);
len = usbd_xfer_frame_len(xfer, 1);
if (usbd_xfer_frame_len(xfer, 0) != 0) {
if (usbd_xfer_frame_len(xfer, 0) == 0) {
acttemp = usbd_xfer_frame_len(xfer, 1);
usb_frlength_t usbd_xfer_frame_len(struct usb_xfer *xfer,
total = usbd_xfer_frame_len(xfer, frame_no);
offset -= usbd_xfer_frame_len(xfer, n);