ATU_ENDPT_TX
sc->atu_ed[ATU_ENDPT_TX] = ed->bEndpointAddress;
if (sc->atu_ep[ATU_ENDPT_TX] != NULL)
usbd_abort_pipe(sc->atu_ep[ATU_ENDPT_TX]);
usbd_clear_endpoint_stall_async(sc->atu_ep[ATU_ENDPT_TX]);
usbd_setup_xfer(c->atu_xfer, sc->atu_ep[ATU_ENDPT_TX],
err = usbd_open_pipe(sc->atu_iface, sc->atu_ed[ATU_ENDPT_TX],
USBD_EXCLUSIVE_USE, &sc->atu_ep[ATU_ENDPT_TX]);
if (sc->atu_ep[ATU_ENDPT_TX] != NULL) {
err = usbd_close_pipe(sc->atu_ep[ATU_ENDPT_TX]);
sc->atu_ep[ATU_ENDPT_TX] = NULL;