UEP_INTR_DT
[UEP_INTR_DT] = {
usbd_transfer_stop(sc->xfer[UEP_INTR_DT]);
usbd_transfer_start(sc->xfer[UEP_INTR_DT]);
if (rate > 0 && sc->xfer[UEP_INTR_DT] != NULL) {
usbd_transfer_stop(sc->xfer[UEP_INTR_DT]);
usbd_xfer_set_interval(sc->xfer[UEP_INTR_DT], 1000 / rate);
usbd_transfer_start(sc->xfer[UEP_INTR_DT]);
usbd_transfer_stop(sc->xfer[UEP_INTR_DT]);