Subversion Repositories sdhc-sc-core

-- SDHC-SC-Core

-- Secure Digital High Capacity Self Configuring Core

-- 

-- (C) Copyright 2010, Rainer Kastl

-- All rights reserved.

-- 

-- Redistribution and use in source and binary forms, with or without

-- modification, are permitted provided that the following conditions are met:

--     * Redistributions of source code must retain the above copyright

--       notice, this list of conditions and the following disclaimer.

--     * Redistributions in binary form must reproduce the above copyright

--       notice, this list of conditions and the following disclaimer in the

--       documentation and/or other materials provided with the distribution.

--     * Neither the name of the <organization> nor the

--       names of its contributors may be used to endorse or promote products

--       derived from this software without specific prior written permission.

-- 

-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  "AS IS" AND

-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

-- DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY

-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

-- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

-- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

-- 

-- File        : EdgeDetector-e.vhdl

-- Owner       : Rainer Kastl

-- Description : 

-- Links       : See EDS at FH Hagenberg

-- 

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

use work.global.all;

entity EdgeDetector is

   generic (

      -- which edge should be detected

      gEdgeDetection    : in natural := cDetectRisingEdge;

      -- with or without second FF

      gOutputRegistered : in boolean := true);

   port (

      iClk               : in  std_ulogic;   -- system clock

      inResetAsync       : in  std_ulogic := '1';   -- global asynchronous reset

      iRstSync           : in std_ulogic := '0'; -- global synchronous reset

      iLine              : in  std_ulogic;   -- input signal

      iClearEdgeDetected : in  std_ulogic;   -- clear edge detected output

      oEdgeDetected      : out std_ulogic);  -- edge detected output

end EdgeDetector;