usbf_ep0_fill_req
usbf_ep0_fill_req(&udc->ep[0], &udc->setup_reply, &status_data,
usbf_ep0_fill_req(&udc->ep[0], &udc->setup_reply, NULL, 0,
usbf_ep0_fill_req(ep0, &udc->setup_reply, NULL, 0, NULL);
usbf_ep0_fill_req(ep0, &udc->setup_reply, NULL,