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[/] [openrisc/] [trunk/] [orpsocv2/] [rtl/] [verilog/] [ethmac/] [eth_register.v] - Diff between revs 403 and 409

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//////////////////////////////////////////////////////////////////////
 
////                                                              ////
 
////  eth_register.v                                              ////
 
////                                                              ////
 
////  This file is part of the Ethernet IP core project           ////
 
////  http://www.opencores.org/project,ethmac                   ////
 
////                                                              ////
 
////  Author(s):                                                  ////
 
////      - Igor Mohor (igorM@opencores.org)                      ////
 
////                                                              ////
 
////  All additional information is avaliable in the Readme.txt   ////
 
////  file.                                                       ////
 
////                                                              ////
 
//////////////////////////////////////////////////////////////////////
 
////                                                              ////
 
//// Copyright (C) 2001, 2002 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, download it   ////
 
//// from http://www.opencores.org/lgpl.shtml                     ////
 
////                                                              ////
 
//////////////////////////////////////////////////////////////////////
 
//
 
// CVS Revision History
 
//
 
// $Log: not supported by cvs2svn $
 
// Revision 1.5  2002/08/16 12:33:27  mohor
 
// Parameter ResetValue changed to capital letters.
 
//
 
// Revision 1.4  2002/02/26 16:18:08  mohor
 
// Reset values are passed to registers through parameters
 
//
 
// Revision 1.3  2002/01/23 10:28:16  mohor
 
// Link in the header changed.
 
//
 
// Revision 1.2  2001/10/19 08:43:51  mohor
 
// eth_timescale.v changed to timescale.v This is done because of the
 
// simulation of the few cores in a one joined project.
 
//
 
// Revision 1.1  2001/08/06 14:44:29  mohor
 
// A define FPGA added to select between Artisan RAM (for ASIC) and Block Ram (For Virtex).
 
// Include files fixed to contain no path.
 
// File names and module names changed ta have a eth_ prologue in the name.
 
// File eth_timescale.v is used to define timescale
 
// All pin names on the top module are changed to contain _I, _O or _OE at the end.
 
// Bidirectional signal MDIO is changed to three signals (Mdc_O, Mdi_I, Mdo_O
 
// and Mdo_OE. The bidirectional signal must be created on the top level. This
 
// is done due to the ASIC tools.
 
//
 
//
 
//
 
//
 
//
 
//
 
//
 
 
 
`include "timescale.v"
 
 
 
 
 
module eth_register(DataIn, DataOut, Write, Clk, Reset, SyncReset);
 
 
 
parameter WIDTH = 8; // default parameter of the register width
 
parameter RESET_VALUE = 0;
 
 
 
input [WIDTH-1:0] DataIn;
 
 
 
input Write;
 
input Clk;
 
input Reset;
 
input SyncReset;
 
 
 
output [WIDTH-1:0] DataOut;
 
reg    [WIDTH-1:0] DataOut;
 
 
 
 
 
 
 
always @ (posedge Clk or posedge Reset)
 
begin
 
  if(Reset)
 
    DataOut<= RESET_VALUE;
 
  else
 
  if(SyncReset)
 
    DataOut<= RESET_VALUE;
 
  else
 
  if(Write)                         // write
 
    DataOut<= DataIn;
 
end
 
 
 
 
 
 
 
endmodule   // Register
 
 
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