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    EEPW首頁 > 電源與新能源 > 設(shè)計應(yīng)用 > 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)

    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)

    作者: 時間:2016-12-06 來源:網(wǎng)絡(luò) 收藏

    parameter GET_BOTH = 3'b101;

    本文引用地址:http://www.biyoush.com/article/201612/326827.htm

    parameter 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;



    關(guān)鍵詞: 源代碼原理

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