MUE_ENDPT_INTR
if (sc->mue_ep[MUE_ENDPT_INTR] != NULL) {
err = usbd_close_pipe(sc->mue_ep[MUE_ENDPT_INTR]);
sc->mue_ep[MUE_ENDPT_INTR] = NULL;
sc->mue_ed[MUE_ENDPT_INTR] = ed->bEndpointAddress;
if (sc->mue_ep[MUE_ENDPT_INTR] != NULL)
usbd_abort_pipe(sc->mue_ep[MUE_ENDPT_INTR]);