WAIT_FOR_DATA_XMIT
bdc->ep0_state = WAIT_FOR_DATA_XMIT;
bdc->ep0_state = WAIT_FOR_DATA_XMIT;
(bdc->ep0_state != WAIT_FOR_DATA_XMIT))
if (bdc->ep0_state == WAIT_FOR_DATA_XMIT) {
case WAIT_FOR_DATA_XMIT: