isp1760_udc_write
isp1760_udc_write(udc, DC_ENDPIDX, ep->addr & USB_ENDPOINT_NUMBER_MASK);
isp1760_udc_write(udc, DC_SCRATCH, 0xbabe);
isp1760_udc_write(udc, DC_ENDPIDX, 1);
isp1760_udc_write(udc, DC_BUFLEN, req->packet_size);
isp1760_udc_write(udc, DC_ENDPIDX, 1);
isp1760_udc_write(udc, DC_BUFLEN, 2);
isp1760_udc_write(udc, DC_DEVADDR, addr);
isp1760_udc_write(udc, DC_FFOSZ, uep->maxpacket);
isp1760_udc_write(udc, DC_BUFLEN, uep->maxpacket);
isp1760_udc_write(udc, DC_ENDPTYP, type);
isp1760_udc_write(udc, field, 0xFFFFFFFF);
isp1760_udc_write(udc, field, 0);