//////////////////////////////////////////////////////////////////////////                                                              ////////  Broadcast_filter.v                                          ////////                                                              ////////  This file is part of the Ethernet IP core project           ////////  http://www.opencores.org/projects.cgi/web/ethernet_tri_mode/////////                                                              ////////  Author(s):                                                  ////////      - Jon Gao (gaojon@yahoo.com)                            ////////                                                              ////////                                                              //////////////////////////////////////////////////////////////////////////////                                                              //////// Copyright (C) 2001 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: Broadcast_filter.v,v $// Revision 1.3  2006/01/19 14:07:54  maverickist// verification is complete.//// Revision 1.2  2005/12/16 06:44:16  Administrator// replaced tab with space.// passed 9.6k length frame test.//// Revision 1.1.1.1  2005/12/13 01:51:45  Administrator// no message//    module Broadcast_filter (    Reset                   ,Clk                     ,//MAC_rx_ctrl           ,broadcast_ptr           ,broadcast_drop          ,//FromCPU               ,broadcast_filter_en     ,broadcast_bucket_depth    ,broadcast_bucket_interval );input           Reset                       ;input           Clk                         ;                //MAC_rx_ctrl               input           broadcast_ptr               ;output          broadcast_drop              ;                //FromCPU                   ;input           broadcast_filter_en         ;input   [15:0]  broadcast_bucket_depth      ;input   [15:0]  broadcast_bucket_interval   ;//******************************************************************************  //internal signals                                                                //******************************************************************************  reg     [15:0]  time_counter            ;reg     [15:0]  broadcast_counter        ;reg             broadcast_drop          ;//******************************************************************************  //                                                               //****************************************************************************** always @ (posedge Clk or posedge Reset)    if (Reset)        time_counter    <=0;    else if (time_counter==broadcast_bucket_interval)        time_counter    <=0;    else        time_counter    <=time_counter+1;always @ (posedge Clk or posedge Reset)    if (Reset)        broadcast_counter   <=0;    else if (time_counter==broadcast_bucket_interval)        broadcast_counter   <=0;    else if (broadcast_ptr&&broadcast_counter!=broadcast_bucket_depth)        broadcast_counter   <=broadcast_counter+1;                always @ (posedge Clk or posedge Reset)    if (Reset)        broadcast_drop      <=0;    else if(broadcast_filter_en&&broadcast_counter==broadcast_bucket_depth)        broadcast_drop      <=1;    else        broadcast_drop      <=0;endmodule