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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        */

/*                                                                           */

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

/*                                  TIMER A                                  */

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

/* Test the timer A:                                                         */

/*                        - Check the timer clock input mux.                 */

/*                                                                           */

/* Author(s):                                                                */

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

/*                                                                           */

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

/* $Rev: 180 $                                                                */

/* $LastChangedBy: olivier.girard $                                          */

/* $LastChangedDate: 2013-02-25 22:23:18 +0100 (Mon, 25 Feb 2013) $          */

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

integer my_counter;

always @ (negedge mclk)

  my_counter <=  my_counter+1;

wire [15:0] tar = timerA_0.tar;

// Generate TACLK as MCLK/3

integer taclk_cnt;

always @ (posedge mclk or posedge puc_rst)

  if (puc_rst)           taclk_cnt <=  0;

  else if (taclk_cnt==2) taclk_cnt <=  0;

  else                   taclk_cnt <=  taclk_cnt+1;

always @ (taclk_cnt)

  if (taclk_cnt==2) taclk = 1'b1;

  else              taclk = 1'b0;

// Generate INCLK as MCLK/5

integer inclk_cnt;

always @ (posedge mclk or posedge puc_rst)

  if (puc_rst)           inclk_cnt <=  0;

  else if (inclk_cnt==4) inclk_cnt <=  0;

  else                   inclk_cnt <=  inclk_cnt+1;

always @ (inclk_cnt)

  if (inclk_cnt==4) inclk = 1'b1;

  else              inclk = 1'b0;

initial

   begin

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

      $display("|                 START SIMULATION              |");

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

      repeat(5) @(posedge mclk);

      stimulus_done = 0;

`ifdef ASIC_CLOCKING

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

      $display("|               SIMULATION SKIPPED              |");

      $display("|   (this test is not supported in ASIC mode)   |");

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

      $finish;

`else

      // TIMER A TEST:  INPUT MUX - TACLK

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

//      @(r15 === 16'h0000);

      @(r15 === 16'h0001);

      @(tar === 1);

      my_counter = 0;

      repeat(300) @(posedge mclk);

      if (tar !== 16'h0032) tb_error("====== TIMER A TEST:  INPUT MUX - TACLK =====");

      // TIMER A TEST:  INPUT MUX - ACLK

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

      @(r15 === 16'h1000);

      @(r15 === 16'h1001);

      @(tar === 1);

      my_counter = 0;

      repeat(300) @(posedge mclk);

      if (tar !== 16'h0005) tb_error("====== TIMER A TEST:  INPUT MUX - ACLK =====");

      // TIMER A TEST:  INPUT MUX - SMCLK

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

      @(r15 === 16'h2000);

      @(r15 === 16'h2001);

      @(tar === 1);

      my_counter = 0;

      repeat(300) @(posedge mclk);

      if (tar !== 16'h0013) tb_error("====== TIMER A TEST:  INPUT MUX - SMCLK =====");

      // TIMER A TEST:  INPUT MUX - INCLK

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

      @(r15 === 16'h3000);

      @(r15 === 16'h3001);

      @(tar === 1);

      my_counter = 0;

      repeat(300) @(posedge mclk);

      if (tar !== 16'h001E) tb_error("====== TIMER A TEST:  INPUT MUX - INCLK =====");

`endif

      stimulus_done = 1;

   end