基于网络编码的多信源组播通信系统，包括源代码，原理图等(四)
end
本文引用地址：//m.amcfsurvey.com/article/201612/326827.htmelse begin
data_router_packingfifo <= {ctrl_temp2, 1'b0 , data_temp2 }; //MSB = 0 means it is an uncoded pkt
val_router_packingfifo <= 1;
//this is the end of a packet, goto JUDGE
if (& (ctrl_temp2)) begin
router_status <= JUDGE;
end
//this is not the end of a packet, goto GET_DATA2
else begin
router_status <= GET_DATA2;
rd_en_payloadfifo_router_2 <= 1;
counter_getdata <= 0;
end
end
end //state SEND_DATA2 endsGET_DATA1: begin
val_router_packingfifo <= 0; //clear output valid signal
//read-FIFO-delay
if (counter_getdata < 2'b01) begin
counter_getdata <= counter_getdata + 1;
router_status <= GET_DATA1;
rd_en_payloadfifo_router_1 <= 0; //clear rd_en signal
end
else begin
data_temp1 <= data_payloadfifo_router_1;
ctrl_temp1 <= ctrl_payloadfifo_router_1;
rd_en_payloadfifo_router_1 <= 0;
router_status <= SEND_DATA1;
end
end //state GET_DATA1 ends
SEND_DATA1: begin
if (!rdy_router_packingfifo) begin
router_status <= SEND_DATA1;
end
else begin
data_router_packingfifo <= {ctrl_temp1, 1'b0 , data_temp1 }; //MSB = 0 means it is an uncoded pkt
val_router_packingfifo <= 1;
//this is the end of a packet, goto JUDGE
if (& (ctrl_temp1)) begin
router_status <= JUDGE;
end
//this is not the end of a packet, goto GET_DATA1
else begin
router_status <= GET_DATA1;
rd_en_payloadfifo_router_1 <= 1;
counter_getdata <= 0;
end
end
end //state SEND_DATA1 ends
GET_BOTH: begin
first_dword_2 <= 0; //
val_router_multiplier_2 <= 0; //clear valid signal
//read-FIFO-delay
if (counter_getdata < 2'b01) begin
counter_getdata <= counter_getdata + 1;
router_status <= GET_BOTH;
rd_en_payloadfifo_router_1 <= 0;
rd_en_payloadfifo_router_2 <= 0; //clear rd_en signals
end
else begin
data_temp1 <= data_payloadfifo_router_1;
ctrl_temp1 <= ctrl_payloadfifo_router_1;
data_temp2 <= data_payloadfifo_router_2;
ctrl_temp2 <= ctrl_payloadfifo_router_2;
router_status <= SEND_BOTH_1;
end
end //state GET_BOTH ends
//according to the random number generator, data from both
//input channels should be sent out seperately
SEND_BOTH_1: begin
if (!rdy_router_multiplier_1) begin
val_router_multiplier_1 <= 0;
router_status <= SEND_BOTH_1;
end
else
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