UDL_BULK_WRITE_1
[UDL_BULK_WRITE_1] = {
usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_1], &sc->sc_xfer_head[1]);
usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);