PORT_APP1
if (receive_data(PORT_APP1, dc))
if (send_data(PORT_APP1, dc)) {
dc->port[PORT_APP1].token_dl = APP1_DL;
dc->port[PORT_APP1].dl_addr[CH_A] =
dc->port[PORT_APP1].dl_size[CH_A] =
dc->port[PORT_APP1].ul_addr[CH_A] =
dc->port[PORT_APP1].ul_size[CH_A] =
port = PORT_APP1;
case PORT_APP1: