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