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-- $Id: simclkcnt.vhd 423 2011-11-12 22:22:25Z mueller $

--

-- Copyright 2011- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>

--

-- This program is free software; you may redistribute and/or modify it under

-- the terms of the GNU General Public License as published by the Free

-- Software Foundation, either version 2, or at your option any later version.

--

-- This program 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 General Public License

-- for complete details.

--

------------------------------------------------------------------------------

-- Module Name:    simclkcnt - sim

-- Description:    test bench system clock cycle counter

--

-- Dependencies:   -

-- Test bench:     -

-- Target Devices: generic

-- Tool versions:  xst 12.1, 13.1; ghdl 0.29

--

-- Revision History: 

-- Date         Rev Version  Comment

-- 2011-11-12   423   1.0.1  now numeric_std clean

-- 2010-11-13    72   1.0    Initial version 

------------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use work.slvtypes.all;

entity simclkcnt is                   -- test bench system clock cycle counter

  port (

    CLK  : in slbit;                  -- clock

    CLK_CYCLE  : out slv31            -- clock cycle number

  );

end entity simclkcnt;

architecture sim of simclkcnt is

  signal R_CLKCNT : slv31 := (others=>'0');

begin

  proc_clk: process (CLK)

  begin

    if rising_edge(CLK) then

      R_CLKCNT <= slv(unsigned(R_CLKCNT) + 1);

    end if;

  end process proc_clk;

  CLK_CYCLE <= R_CLKCNT;

end sim;