Subversion Repositories ethernet_tri_mode

//////////////////////////////////////////////////////////////////////

////                                                              ////

////  User_input_sim.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                                               

//                                                                    

//

// Revision 1.1.1.1  2005/12/13 01:51:44  Administrator

// no message

// 

module User_int_sim (

input                   Reset                                   ,

input                   Clk_user                                ,

                                //user inputerface 

input                   Rx_mac_ra                               ,

output                  Rx_mac_rd                               ,

input   [31:0]   Rx_mac_data                             ,

input   [1:0]    Rx_mac_BE                               ,

input                   Rx_mac_pa                               ,

input                   Rx_mac_sop                              ,

input                   Rx_mac_eop                              ,

                                //user inputerface 

input                   Tx_mac_wa                       ,

output                  Tx_mac_wr                       ,

output  [31:0]   Tx_mac_data                     ,

output  [1:0]    Tx_mac_BE                               ,//big endian

output                  Tx_mac_sop                      ,

output                  Tx_mac_eop

);

//////////////////////////////////////////////////////////////////////

// inputernal signals

//////////////////////////////////////////////////////////////////////

reg[4:0]         operation;

reg[31:0]                data;

reg                             Rx_mac_rd;

reg                             Start_tran;

//////////////////////////////////////////////////////////////////////

//generate Tx user data

//////////////////////////////////////////////////////////////////////

initial

        begin

        operation       =0;

        data            =0;

        end

always @ (posedge Clk_user or posedge Reset)

        if (Reset)

                Start_tran      <=0;

        else if (Tx_mac_eop&&!Tx_mac_wa)

                Start_tran      <=0;

        else if (Tx_mac_wa)

                Start_tran      <=1;

always @ (posedge Clk_user )

        if (Tx_mac_wa)

                $ip_32W_gen("config.ini",operation,data);

        else

                begin

                operation       <=0;

                data            <=0;

                end

assign Tx_mac_data      =data;

assign Tx_mac_wr        =operation[4];

assign Tx_mac_sop       =operation[3];

assign Tx_mac_eop   =operation[2];

assign Tx_mac_BE    =operation[1:0];

//////////////////////////////////////////////////////////////////////

//verify Rx user data

//////////////////////////////////////////////////////////////////////

always @ (posedge Clk_user or posedge Reset)

        if (Reset)

                Rx_mac_rd       <=0;

        else if(Rx_mac_ra)

                Rx_mac_rd       <=1;

        else

                Rx_mac_rd       <=0;

always @ (posedge Clk_user )

        if (Rx_mac_pa)

                $ip_32W_check(  Rx_mac_data,

                                                {Rx_mac_sop,Rx_mac_eop,Rx_mac_eop?Rx_mac_BE:2'b0});

endmodule