48_fir_4_tb.v

本次设计的数字基带成形滤波器参照IS-95标准进行设计

`timescale 1 ns / 1 ns

module filter_tb_48_1;

  // Parameters
  parameter clk_high   = 20;
  parameter clk_low    = 20;
  parameter clk_period = 40;
  parameter clk_hold   = 2;

  // Nets
  reg clk;
  reg clk1=0;
  reg clk_enable;
  reg reset;
  reg  signed [19:0] filter_in;
  wire signed  [19:0] filter_out;

  //integer n;  //loop variable


  reg signed [15:0] filter_in_force [0:100];
  reg signed [15:0] filter_out_expected [0:100];

  /* Function definitions
  function real abs_real;
  input real arg;
  begin
    abs_real = arg > 0 ? arg : -arg;
  end
  endfunction function abs_real*/

  // Component Instances
  base_48_fir u_filter_48
    (
    .filter_out(filter_out),
    .filter_in(filter_in),
    .clk(clk),
    .reset(reset),
    .clk_enable(clk_enable),
    .clk1(clk1)
    );
initial
      begin
          filter_in<=1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<=1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0; 
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          //100
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<=1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0; 
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          //200
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<=1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0; 
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          //300
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<=1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0; 
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 1;
          #10 filter_in<= 0;
          #10 filter_in<= 0;
          #10 filter_in<= 1;
          //400
      end
    // Block Statements
  always  // clk generation
    begin : clk_gen
    clk <= 1'b1;
    # clk_high;
    clk <= 1'b0;
    # clk_low;
    end  //clk_gen;
  always #5 clk1=~clk1; 
  initial  // reset block
    begin : reset_gen
    
    reset <= 1'b1;
    # (clk_period + clk_hold);
    reset <= 1'b0;
  end  //reset_gen;
  initial
  begin
  clk_enable <= 1'b0;
  #13 clk_enable<= 1'b1;
  end
  //initial
  //begin
   // for(n = 0; n<= 100; n = n + 1)
   // #10 filter_in<=filter_in_force[n]; 
  //end
  initial #4000 $finish;
  endmodule
  /*initial  //The main block 
    begin
    # clk_period;
    filter_in <= filter_in_force[0];
    # (clk_period*2 + clk_hold);
    filter_in <= filter_in_force[1];
    # clk_period;
    for (n = 0; n<= 100; n = n + 1)
      begin
      if (abs_real($bitstoreal(filter_out) - $bitstoreal(filter_out_expected[n])) >= 1.0e-9)
        $display("ERROR in filter test at time %t : Expected '%f' Actual '%f'", $time, $bitstoreal(filter_out_expected[n]), $bitstoreal(filter_out));
      if (n + 2 <= 100)
        filter_in <= filter_in_force[n + 2];
      # (clk_period);
      end
    $display( "**** Test Complete. ****" );
    $stop;

  end */