基于網(wǎng)絡(luò)編碼的多信源組播通信系統(tǒng)，包括源代碼，原理圖等(四)
英飛凌汽車電子生態(tài)圈
parameter GET_BOTH = 3'b101;
本文引用地址：http://www.ex-cimer.com/article/201612/326827.htmparameter SEND_BOTH_1 = 3'b110;
parameter SEND_BOTH_2 = 3'b111;
always @(posedge clk or negedge rst_n) begin
//reset process
if (rst_n == 0) begin
router_status <= JUDGE;
data_temp1 <= 64'h0;
ctrl_temp1 <= 8'h0;
data_temp2 <= 64'h0;
ctrl_temp2 <= 8'h0;
counter_getdata <= 2'b0;
end
else begin
case (router_status)
JUDGE: begin
first_dword_1 <= 0;
first_dword_2 <= 0;
rand_num_en <= 0;
val_router_multiplier_2 <= 0; //clear some signals
//program hold, when packing FIFO inempty
if (!empty_packingfifo) begin
router_status <= JUDGE;
end
else begin
//both FIFO ctrl payload 1 & 2 are empty
if (empty_payloadfifo_router_1 && empty_payloadfifo_router_2) begin
rd_en_payloadfifo_router_1 <= 0;
rd_en_payloadfifo_router_2 <= 0;
router_status <= JUDGE;
end
//FIFO ctrl paylaod 2 is inempty, read from this FIFO,
//coding will be unnecessary
else if (empty_payloadfifo_router_1 && (!empty_payloadfifo_router_2)) begin
rd_en_payloadfifo_router_2 <= 1;
rd_en_payloadfifo_router_1 <= 0;
counter_getdata <= 0;
router_status <= GET_DATA2;
end
//FIFO ctrl payload 1 is inempty, read from this FIFO,
//coding will be unnecessary
else if ((!empty_payloadfifo_router_1) && empty_payloadfifo_router_2) begin
rd_en_payloadfifo_router_1 <= 1;
rd_en_payloadfifo_router_2 <= 0;
counter_getdata <= 0;
router_status <= GET_DATA1;
end
//both FIFO ctrl payload 1&2 are inempty, read from both
//of them, coding is needed
else if ((!empty_payloadfifo_router_1) && (!empty_payloadfifo_router_2)) begin
rd_en_payloadfifo_router_1 <= 1;
rd_en_payloadfifo_router_2 <= 1;
counter_getdata <= 0;
router_status <= GET_BOTH;
end
end
end //state JUDGE ends
//read data from FIFO ctrl payload 2
GET_DATA2: begin
val_router_packingfifo <= 0; //clear the output valid signal
//read-FIFO-delay
if (counter_getdata < 2'b01) begin
counter_getdata <= counter_getdata + 1;
router_status <= GET_DATA2;
rd_en_payloadfifo_router_2 <= 0; //clear rd_en signal
end
else begin
data_temp2 <= data_payloadfifo_router_2;
ctrl_temp2 <= ctrl_payloadfifo_router_2;
router_status <= SEND_DATA2;
end
end //state GET_DATA2 ends
//send data to packing fifo without coding
SEND_DATA2: begin
if (!rdy_router_packingfifo) begin
router_status <= SEND_DATA2;
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