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//////////////////////////////////////////////////////////////////////
//// ////
//// Phy_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
//
// $Log: Phy_sim.v,v $
// Revision 1.3 2006/11/17 17:53:07 maverickist
// no message
//
// Revision 1.2 2006/01/19 14:07:50 maverickist
// verification is complete.
//
// Revision 1.1.1.1 2005/12/13 01:51:44 Administrator
// no message
//
`timescale 1ns/100ps
module phy_sim(
input Gtx_clk, // Used only in GMII mode
output Rx_clk,
output Tx_clk, // Used only in MII mode
input Tx_er,
input Tx_en,
input [7:0] Txd,
output Rx_er,
output Rx_dv,
output [7:0] Rxd,
output Crs,
output Col,
input [2:0] Speed,
input Done
);
//////////////////////////////////////////////////////////////////////
// this file used to simulate Phy.
// generate clk and loop the Tx data to Rx data
// full duplex mode can be verified on loop mode.
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// internal signals
//////////////////////////////////////////////////////////////////////
reg Clk_25m; // Used for 100 Mbps mode
reg Clk_2_5m; // Used for 10 Mbps mode
//wire Rx_clk;
//wire Tx_clk; // Used only in MII mode
initial
begin
#10;
while ( !Done )
begin
#20 Clk_25m = 0;
#20 Clk_25m = 1;
end
end
initial
begin
#10;
while ( !Done )
begin
#200 Clk_2_5m = 0;
#200 Clk_2_5m = 1;
end
end
assign Rx_clk = Speed[2] ? Gtx_clk : Speed[1] ? Clk_25m : Speed[0] ? Clk_2_5m : 0;
assign Tx_clk = Speed[2] ? Gtx_clk : Speed[1] ? Clk_25m : Speed[0] ? Clk_2_5m : 0;
assign Rx_dv = Tx_en;
assign Rxd = Txd;
assign Rx_er = Tx_er;
assign Crs = Tx_en;
assign Col = 0;
endmodule
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