tb_ps2key_tb_0.v

本实例是学习fpga的入门程序 希望大家喜欢

////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 1995-2003 Xilinx, Inc.
// All Right Reserved.
////////////////////////////////////////////////////////////////////////////////
//   ____  ____ 
//  /   /\/   / 
// /___/  \  /    Vendor: Xilinx 
// \   \   \/     Version : 8.1i
//  \   \         Application : ISE
//  /   /         Filename : tb_ps2key.tfw
// /___/   /\     Timestamp : Wed Mar 14 00:00:56 2007
// \   \  /  \ 
//  \___\/\___\ 
//
//Command: 
//Design Name: tb_ps2key_tb_0
//Device: Xilinx
//
`timescale 1ns/1ps

module tb_ps2key_tb_0;
    reg clk = 1'b0;
    reg rst_n = 1'b0;
    reg ps2c_in = 1'b0;
    reg ps2d_in = 1'b0;
    wire txd;

    parameter PERIOD = 40;
    parameter real DUTY_CYCLE = 0.5;
    parameter OFFSET = 0;

    initial    // Clock process for clk
    begin
        #OFFSET;
        forever
        begin
            clk = 1'b0;
            #(PERIOD-(PERIOD*DUTY_CYCLE)) clk = 1'b1;
            #(PERIOD*DUTY_CYCLE);
        end
    end

    ps2key_top UUT (
        .clk(clk),
        .rst_n(rst_n),
        .ps2c_in(ps2c_in),
        .ps2d_in(ps2d_in),
        .txd(txd));

        integer TX_ERROR = 0;
        
        initial begin  // Open the results file...
            #1.00004e+006 // Final time:  1.00004e+006 ns
            if (TX_ERROR == 0) begin
                $display("No errors or warnings.");
                end else begin
                    $display("%d errors found in simulation.", TX_ERROR);
                    end
                    $stop;
                end

                initial begin
                    // -------------  Current Time:  25ns
                    #25;
                    CHECK_txd(1'b1);
                    // -------------------------------------
                    // -------------  Current Time:  455ns
                    #430;
                    ps2c_in = 1'b1;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  1615ns
                    #1160;
                    rst_n = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  7375ns
                    #5760;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  10575ns
                    #3200;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  12975ns
                    #2400;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  13775ns
                    #800;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  15375ns
                    #1600;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  18495ns
                    #3120;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  21015ns
                    #2520;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  21055ns
                    #40;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  24255ns
                    #3200;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  27175ns
                    #2920;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  29615ns
                    #2440;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  30975ns
                    #1360;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  33495ns
                    #2520;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  35975ns
                    #2480;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  38255ns
                    #2280;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  40735ns
                    #2480;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  44135ns
                    #3400;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  46055ns
                    #1920;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  47815ns
                    #1760;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  49575ns
                    #1760;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  54015ns
                    #4440;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  61655ns
                    #7640;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  68255ns
                    #6600;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  79735ns
                    #11480;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  88215ns
                    #8480;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  91905ns
                    #3690;
                    CHECK_txd(1'b0);
                    // -------------------------------------
                    // -------------  Current Time:  95695ns
                    #3790;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  101535ns
                    #5840;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  111775ns
                    #10240;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  119815ns
                    #8040;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  123295ns
                    #3480;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  124775ns
                    #1480;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  128105ns
                    #3330;
                    CHECK_txd(1'b1);
                    // -------------------------------------
                    // -------------  Current Time:  130095ns
                    #1990;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  140895ns
                    #10800;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  142975ns
                    #2080;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  153175ns
                    #10200;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  159255ns
                    #6080;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  170335ns
                    #11080;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  177495ns
                    #7160;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  182505ns
                    #5010;
                    CHECK_txd(1'b0);
                    // -------------------------------------
                    // -------------  Current Time:  188815ns
                    #6310;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  197415ns
                    #8600;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  200705ns
                    #3290;
                    CHECK_txd(1'b1);
                    // -------------------------------------
                    // -------------  Current Time:  207535ns
                    #6830;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  218905ns
                    #11370;
                    CHECK_txd(1'b0);
                    // -------------------------------------
                    // -------------  Current Time:  220775ns
                    #1870;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  226175ns
                    #5400;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  231455ns
                    #5280;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  235815ns
                    #4360;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  242375ns
                    #6560;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  255105ns
                    #12730;
                    CHECK_txd(1'b1);
                    // -------------------------------------
                    // -------------  Current Time:  259615ns
                    #4510;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  270415ns
                    #10800;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  277135ns
                    #6720;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  291975ns
                    #14840;
                    ps2c_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  302055ns
                    #10080;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  310815ns
                    #8760;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  318575ns
                    #7760;
                    ps2c_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  333695ns
                    #15120;
                    ps2d_in = 1'b1;
                    // -------------------------------------
                    // -------------  Current Time:  343135ns
                    #9440;
                    ps2d_in = 1'b0;
                    // -------------------------------------
                    // -------------  Current Time:  376135ns