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[/] [qaz_libs/] [trunk/] [BFM/] [src/] [tb/] [tb_base.sv] - Rev 50

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//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2019 Authors and OPENCORES.ORG                 ////
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//// This source file may be used and distributed without         ////
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////                                                              ////
//// This source file is free software; you can redistribute it   ////
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//// Public License as published by the Free Software Foundation; ////
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//// later version.                                               ////
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//// details.                                                     ////
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//// You should have received a copy of the GNU Lesser General    ////
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//////////////////////////////////////////////////////////////////////

module
  tb_base
  #(
    N = 1,
    realtime PERIODS[N],
    realtime ASSERT_TIME = (PERIODS[0] * 5) + (PERIODS[0] / 3)
  )
  (
    output bit tb_clk[N],
    output bit tb_aresetn,
    output bit tb_reset[N]
  );
  timeunit 1ns;
  timeprecision 100ps;

  // --------------------------------------------------------------------
  function void assert_reset(realtime reset_assert=ASSERT_TIME);
    fork
      begin
      tb_aresetn = 0;
      #reset_assert;
      tb_aresetn = 1;
      end
    join_none
  endfunction

  // --------------------------------------------------------------------
  bit disable_clks[N];

  generate
    for(genvar j = 0; j < N; j++) begin
      always
        if(disable_clks[j])
          tb_clk[j] = 0;
        else
          #(PERIODS[j]/2) tb_clk[j] = ~tb_clk[j];
    end
  endgenerate

  // --------------------------------------------------------------------
  generate
    for(genvar j = 0; j < N; j++) begin
      bit reset = 1;
      assign tb_reset[j] = reset;

      always @(posedge tb_clk[j] or negedge tb_aresetn)
        if(~tb_aresetn)
          reset = 1;
        else
          reset = 0;
    end
  endgenerate

  // --------------------------------------------------------------------
  initial
    assert_reset();

// --------------------------------------------------------------------
endmodule

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