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/*===========================================================================*/

/* Copyright (C) 2001 Authors                                                */

/*                                                                           */

/* This source file may be used and distributed without restriction provided */

/* that this copyright statement is not removed from the file and that any   */

/* derivative work contains the original copyright notice and the associated */

/* disclaimer.                                                               */

/*                                                                           */

/* This source file is free software; you can redistribute it and/or modify  */

/* it under the terms of the GNU Lesser General Public License as published  */

/* by the Free Software Foundation; either version 2.1 of the License, or    */

/* (at your option) any later version.                                       */

/*                                                                           */

/* This source is distributed in the hope that it will be useful, but WITHOUT*/

/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     */

/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public       */

/* License for more details.                                                 */

/*                                                                           */

/* You should have received a copy of the GNU Lesser General Public License  */

/* along with this source; if not, write to the Free Software Foundation,    */

/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA        */

/*                                                                           */

/*===========================================================================*/

/*                                SCAN test                                  */

/*---------------------------------------------------------------------------*/

/* The purpose of this test is to let the scan_mode and scan_enable signals  */

/* toggle a bit in order to clean-up code coverage and give more visibility  */

/* on potential "real" coverage loss.                                        */

/*                                                                           */

/* Author(s):                                                                */

/*             - Olivier Girard,    olgirard@gmail.com                       */

/*                                                                           */

/*---------------------------------------------------------------------------*/

/* $Rev: 85 $                                                                */

/* $LastChangedBy: olivier.girard $                                          */

/* $LastChangedDate: 2011-01-28 22:05:37 +0100 (Fri, 28 Jan 2011) $          */

/*===========================================================================*/

integer ii;

initial

   begin

      $display(" ===============================================");

      $display("|                 START SIMULATION              |");

      $display(" ===============================================");

      // Disable automatic DMA verification

      #10;

      dma_verif_on = 0;

      repeat(5) @(posedge mclk);

      stimulus_done = 0;

      // Disable detection of the end of test

      force inst_pc = 16'h0000;

      //  SCAN MODE

      //------------------------------

      for ( ii=0; ii < 8; ii=ii+1)

        begin

           scan_mode = ~scan_mode;

           repeat(5) @(posedge mclk);

        end

      scan_mode = 1'b0;

      reset_n       = 1'b1;

      #93;

      reset_n       = 1'b0;

      #593;

      reset_n       = 1'b1;

      repeat(20) @(posedge mclk);

      //  SCAN ENABLE

      //------------------------------

      for ( ii=0; ii < 8; ii=ii+1)

        begin

           scan_enable = ~scan_enable;

           repeat(5) @(posedge mclk);

        end

      scan_enable = 1'b0;

      reset_n       = 1'b1;

      #93;

      reset_n       = 1'b0;

      #593;

      reset_n       = 1'b1;

      repeat(20) @(posedge mclk);

      //  SCAN MODE & SCAN ENABLE

      //------------------------------

      for ( ii=0; ii < 8; ii=ii+1)

        begin

           scan_mode = ~scan_mode;

           repeat(5) @(posedge mclk);

           scan_enable = ~scan_enable;

           repeat(5) @(posedge mclk);

           scan_enable = ~scan_enable;

           repeat(5) @(posedge mclk);

           scan_mode = ~scan_mode;

           repeat(5) @(posedge mclk);

        end

      scan_mode   = 1'b0;

      scan_enable = 1'b0;

      repeat(5) @(posedge mclk);

      for ( ii=0; ii < 8; ii=ii+1)

        begin

           scan_enable = ~scan_enable;

           repeat(5) @(posedge mclk);

           scan_mode = ~scan_mode;

           repeat(5) @(posedge mclk);

           scan_mode = ~scan_mode;

           repeat(5) @(posedge mclk);

           scan_enable = ~scan_enable;

           repeat(5) @(posedge mclk);

        end

      scan_mode   = 1'b0;

      scan_enable = 1'b0;

      reset_n       = 1'b1;

      #93;

      reset_n       = 1'b0;

      #593;

      reset_n       = 1'b1;

      repeat(20) @(posedge mclk);

      release inst_pc;

      stimulus_done = 1;

   end