rxnumcounter.v

ethmac10g_latest.tar.gz源代码

//////////////////////////////////////////////////////////////////////
////                                                              ////
//// MODULE NAME: rxNumCounter                                    ////
////                                                              ////
//// DESCRIPTION: To count bytes have been received.              ////
////                                                              ////
////                                                              ////
//// This file is part of the 10 Gigabit Ethernet IP core project ////
////  http://www.opencores.org/projects/ethmac10g/                ////
////                                                              ////
//// AUTHOR(S):                                                   ////
//// Zheng Cao                                                    ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (c) 2005 AUTHORS.  All rights reserved.            ////
////                                                              ////
//// 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 1.1.1.1  2006/05/31 05:59:42  Zheng Cao
// first version
//
// Revision 1.1  2005/12/25 16:43:10  Zheng Cao
// 
// 
//
//////////////////////////////////////////////////////////////////////

`include "timescale.v"
`include "xgiga_define.v"

module rxNumCounter(rxclk, reset, receiving, frame_cnt);
    
    input rxclk;            //receive clk	 
    input reset; //globe reset

    input receiving; //start to count	data field

    output[`COUNTER_WIDTH-1:0] frame_cnt;

    parameter TP =1;

    // Data counter
    // used in rxReceiveData field, 
    // this counter is used for frames whose length is larger than 64
    // Of course it also count actual bytes of frames whose length is shorter than 64.
    counter data_counter(.clk(rxclk), .reset(reset), .load(~receiving), .en(receiving), .value(frame_cnt));
    defparam data_counter.WIDTH = `COUNTER_WIDTH;

endmodule