www.pudn.com > CAN_IPCore.rar > can_register_asyn.v
//////////////////////////////////////////////////////////////////////
//// ////
//// can_register_asyn.v ////
//// ////
//// ////
//// This file is part of the CAN Protocol Controller ////
//// http://www.opencores.org/projects/can/ ////
//// ////
//// ////
//// Author(s): ////
//// Igor Mohor ////
//// igorm@opencores.org ////
//// ////
//// ////
//// All additional information is available in the README.txt ////
//// file. ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2002, 2003, 2004 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 ////
//// ////
//// The CAN protocol is developed by Robert Bosch GmbH and ////
//// protected by patents. Anybody who wants to implement this ////
//// CAN IP core on silicon has to obtain a CAN protocol license ////
//// from Bosch. ////
//// ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: can_register_asyn.v,v $
// Revision 1.7 2004/02/08 14:33:19 mohor
// Header changed.
//
// Revision 1.6 2003/03/20 16:58:50 mohor
// unix.
//
// Revision 1.4 2003/03/11 16:32:34 mohor
// timescale.v is used for simulation only.
//
// Revision 1.3 2003/02/09 02:24:33 mohor
// Bosch license warning added. Error counters finished. Overload frames
// still need to be fixed.
//
// Revision 1.2 2002/12/27 00:12:52 mohor
// Header changed, testbench improved to send a frame (crc still missing).
//
// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
// Initial
//
//
//
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
module can_register_asyn
( data_in,
data_out,
we,
clk,
rst
);
parameter WIDTH = 8; // default parameter of the register width
parameter RESET_VALUE = 0;
input [WIDTH-1:0] data_in;
input we;
input clk;
input rst;
output [WIDTH-1:0] data_out;
reg [WIDTH-1:0] data_out;
always @ (posedge clk or posedge rst)
begin
if (rst) // asynchronous reset
data_out<=#1 RESET_VALUE;
else if (we) // write
data_out<=#1 data_in;
end
endmodule