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57 lines
1.7 KiB
VHDL
57 lines
1.7 KiB
VHDL
-- $Id: simclkcnt.vhd 984 2018-01-02 20:56:27Z mueller $
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--
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-- Copyright 2011- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 3, or (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful, but
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-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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-- for complete details.
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--
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------------------------------------------------------------------------------
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-- Module Name: simclkcnt - sim
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-- Description: test bench system clock cycle counter
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--
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-- Dependencies: -
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-- Test bench: -
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-- Target Devices: generic
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-- Tool versions: xst 12.1-14.7; viv 2016.2; ghdl 0.29-0.33
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--
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-- Revision History:
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-- Date Rev Version Comment
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-- 2011-12-23 444 2.0 CLK_CYCLE now an integer
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-- 2011-11-12 423 1.0.1 now numeric_std clean
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-- 2010-11-13 72 1.0 Initial version
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------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use work.slvtypes.all;
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entity simclkcnt is -- test bench system clock cycle counter
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port (
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CLK : in slbit; -- clock
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CLK_CYCLE : out integer -- clock cycle number
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);
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end entity simclkcnt;
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architecture sim of simclkcnt is
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signal R_CLKCNT : integer := 0;
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begin
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proc_clk: process (CLK)
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begin
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if rising_edge(CLK) then
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R_CLKCNT <= R_CLKCNT + 1;
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end if;
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end process proc_clk;
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CLK_CYCLE <= R_CLKCNT;
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end sim;
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