Subversion Repositories configurable_crc_core

module  crc_cmp_tb();

    parameter  datw  = 8;

    reg   clk, rst, rst_syn;

    reg   crc_en;

    reg   [15: 0] random_dat;

    wire  dat_i = random_dat[15];

    wire  [datw - 2: 0] dat_o, dat_o_2;

    initial  begin

        clk  = 0;

        forever  #5 clk = ~clk;

    end

    initial  begin

        rst_syn  = 0;

        crc_en   = 0;

    end

    initial  begin

             rst  = 0;

        #200 rst  = 1;

        #20  rst  = 0;

    end

    initial    begin

        @(negedge rst)

        repeat(20)      begin

                        CRC_task;

                        if (dat_o == dat_o_2)

                                $display("\tData is correct!\n");

                end

    end

    task CRC_task;

    begin

        random_dat = 16'hff;//$random();

        rst_syn    = 1;

        #20

        rst_syn    = 0;

        repeat (16)    begin

            crc_en    = 1;

            @(posedge clk)

            random_dat    = random_dat << 1;

        end

        crc_en    = 0;

    end

    endtask

    cfg_crc

    #(

        .datw(datw),

        .coff(8'b1000_1001)

    ) CRC_F0

    (

        .clk(clk), .rst(rst),

        .rst_syn(rst_syn),

        .crc_en(crc_en),

        .dat_i(dat_i),

        .dat_o(dat_o)

    );

        crc_7   CRC_F1(

                .clk(clk), .rst(rst_syn),

                .crc_en(crc_en),

                .sda_i(dat_i),

                .crc_o(dat_o_2)

    );

endmodule