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[/] [qaz_libs/] [trunk/] [BFM/] [src/] [tb/] [tb_base.sv] - Blame information for rev 50

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//////////////////////////////////////////////////////////////////////
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////                                                              ////
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//// Copyright (C) 2019 Authors and OPENCORES.ORG                 ////
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////                                                              ////
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//// This source file may be used and distributed without         ////
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//// restriction provided that this copyright statement is not    ////
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//// removed from the file and that any derivative work contains  ////
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//// the original copyright notice and the associated disclaimer. ////
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////                                                              ////
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//// This source file is free software; you can redistribute it   ////
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//// and/or modify it under the terms of the GNU Lesser General   ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any   ////
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//// later version.                                               ////
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////                                                              ////
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//// This source is distributed in the hope that it will be       ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
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//// PURPOSE.  See the GNU Lesser General Public License for more ////
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//// details.                                                     ////
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////                                                              ////
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//// You should have received a copy of the GNU Lesser General    ////
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//// Public License along with this source; if not, download it   ////
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//// from http://www.opencores.org/lgpl.shtml                     ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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module
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  tb_base
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  #(
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    N = 1,
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    realtime PERIODS[N],
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    realtime ASSERT_TIME = (PERIODS[0] * 5) + (PERIODS[0] / 3)
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  )
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  (
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    output bit tb_clk[N],
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    output bit tb_aresetn,
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    output bit tb_reset[N]
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  );
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  timeunit 1ns;
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  timeprecision 100ps;
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  // --------------------------------------------------------------------
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  function void assert_reset(realtime reset_assert=ASSERT_TIME);
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    fork
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      begin
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      tb_aresetn = 0;
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      #reset_assert;
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      tb_aresetn = 1;
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      end
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    join_none
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  endfunction
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  // --------------------------------------------------------------------
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  bit disable_clks[N];
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  generate
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    for(genvar j = 0; j < N; j++) begin
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      always
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        if(disable_clks[j])
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          tb_clk[j] = 0;
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        else
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          #(PERIODS[j]/2) tb_clk[j] = ~tb_clk[j];
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    end
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  endgenerate
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  // --------------------------------------------------------------------
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  generate
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    for(genvar j = 0; j < N; j++) begin
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      bit reset = 1;
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      assign tb_reset[j] = reset;
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      always @(posedge tb_clk[j] or negedge tb_aresetn)
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        if(~tb_aresetn)
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          reset = 1;
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        else
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          reset = 0;
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    end
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  endgenerate
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  // --------------------------------------------------------------------
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  initial
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    assert_reset();
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// --------------------------------------------------------------------
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endmodule

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