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

////                                                              ////

////  MAC_tx.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: not supported by cvs2svn $

// Revision 1.2  2005/12/16 06:44:14  Administrator

// replaced tab with space.

// passed 9.6k length frame test.

//

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

// no message

//   

module MAC_tx(

input           Reset               ,

input           Clk                 ,

input           Clk_user            ,

                //PHY interface

output  [7:0]   TxD                 ,

output          TxEn                ,

input           CRS                 ,

                //RMON

output  [2:0]   Tx_pkt_type_rmon    ,

output  [15:0]  Tx_pkt_length_rmon  ,

output          Tx_apply_rmon       ,

output  [2:0]   Tx_pkt_err_type_rmon,

                //user interface 

output          Tx_mac_wa           ,

input           Tx_mac_wr           ,

input   [31:0]  Tx_mac_data         ,

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

input           Tx_mac_sop          ,

input           Tx_mac_eop          ,

                //host interface 

input   [4:0]   Tx_Hwmark           ,

input   [4:0]   Tx_Lwmark           ,

input           pause_frame_send_en ,

input   [15:0]  pause_quanta_set    ,

input           MAC_tx_add_en       ,

input           FullDuplex          ,

input   [3:0]   MaxRetry            ,

input   [5:0]   IFGset              ,

input   [7:0]   MAC_add_prom_data   ,

input   [2:0]   MAC_add_prom_add    ,

input           MAC_add_prom_wr     ,

input           tx_pause_en         ,

input           xoff_cpu            ,

input           xon_cpu             ,

                //MAC_rx_flow       ,

input   [15:0]  pause_quanta        ,

input           pause_quanta_val    ,

);

//******************************************************************************        

//internal signals                                                              

//******************************************************************************   

                //CRC_gen Interface 

wire            CRC_init            ;

wire[7:0]       Frame_data          ;

wire            Data_en             ;

wire            CRC_rd              ;

wire            CRC_end             ;

wire[7:0]       CRC_out             ;

                //Ramdon_gen interface

wire            Random_init         ;

wire[3:0]       RetryCnt            ;

wire            Random_time_meet    ;//levle hight indicate random time passed away

                //flow control

wire            pause_apply         ;

wire            pause_quanta_sub    ;

wire            xoff_gen            ;

wire            xoff_gen_complete   ;

wire            xon_gen             ;

wire            xon_gen_complete    ;

                //MAC_rx_FF

wire[7:0]       Fifo_data           ;

wire            Fifo_rd             ;

wire            Fifo_eop            ;

wire            Fifo_da             ;

wire            Fifo_rd_finish      ;

wire            Fifo_rd_retry       ;

wire            Fifo_ra             ;

wire            Fifo_data_err_empty ;

wire            Fifo_data_err_full  ;

                //MAC_tx_addr_add

wire            MAC_tx_addr_init    ;

wire            MAC_tx_addr_rd      ;

wire[7:0]       MAC_tx_addr_data    ;

//******************************************************************************        

//instantiation                                                              

//****************************************************************************** 

MAC_tx_ctrl U_MAC_tx_ctrl(

.Reset                    (Reset                  ),

.Clk                      (Clk                    ),

 //CRC_gen Interface      (//CRC_gen Interface    ),           

.CRC_init                 (CRC_init               ),

.Frame_data               (Frame_data             ),

.Data_en                  (Data_en                ),

.CRC_rd                   (CRC_rd                 ),

.CRC_end                  (CRC_end                ),

.CRC_out                  (CRC_out                ),

 //Ramdon_gen interfac    (//Ramdon_gen interfac  ),           

.Random_init              (Random_init            ),

.RetryCnt                 (RetryCnt               ),

.Random_time_meet         (Random_time_meet       ),

 //flow control           (//flow control         ),           

.pause_apply              (pause_apply            ),

.pause_quanta_sub         (pause_quanta_sub       ),

.xoff_gen                 (xoff_gen               ),

.xoff_gen_complete        (xoff_gen_complete      ),

.xon_gen                  (xon_gen                ),

.xon_gen_complete         (xon_gen_complete       ),

 //MAC_tx_FF              (//MAC_tx_FF            ),           

.Fifo_data                (Fifo_data              ),

.Fifo_rd                  (Fifo_rd                ),

.Fifo_eop                 (Fifo_eop               ),

.Fifo_da                  (Fifo_da                ),

.Fifo_rd_finish           (Fifo_rd_finish         ),

.Fifo_rd_retry            (Fifo_rd_retry          ),

.Fifo_ra                  (Fifo_ra                ),

.Fifo_data_err_empty      (Fifo_data_err_empty    ),

.Fifo_data_err_full       (Fifo_data_err_full     ),

 //RMII                   (//RMII                 ),           

.TxD                      (TxD                    ),

.TxEn                     (TxEn                   ),

.CRS                      (CRS                    ),

 //MAC_tx_addr_add        (//MAC_tx_addr_add      ),           

.MAC_tx_addr_rd           (MAC_tx_addr_rd         ),

.MAC_tx_addr_data         (MAC_tx_addr_data       ),

.MAC_tx_addr_init         (MAC_tx_addr_init       ),

 //RMON                   (//RMON                 ),           

.Tx_pkt_type_rmon         (Tx_pkt_type_rmon       ),

.Tx_pkt_length_rmon       (Tx_pkt_length_rmon     ),

.Tx_apply_rmon            (Tx_apply_rmon          ),

.Tx_pkt_err_type_rmon     (Tx_pkt_err_type_rmon   ),

 //CPU                    (//CPU                  ),           

.pause_frame_send_en      (pause_frame_send_en    ),

.pause_quanta_set         (pause_quanta_set       ),

.MAC_tx_add_en            (MAC_tx_add_en          ),

.FullDuplex               (FullDuplex             ),

.MaxRetry                 (MaxRetry               ),

.IFGset                   (IFGset                 )

);

CRC_gen U_CRC_gen(

.Reset                    (Reset                  ),

.Clk                      (Clk                    ),

.Init                     (CRC_init               ),

.Frame_data               (Frame_data             ),

.Data_en                  (Data_en                ),

.CRC_rd                   (CRC_rd                 ),

.CRC_out                  (CRC_out                ),

.CRC_end                  (CRC_end                )

);

flow_ctrl U_flow_ctrl(

.Reset                    (Reset                  ),

.Clk                      (Clk                    ),

 //host processor         (//host processor       ),

.tx_pause_en              (tx_pause_en            ),

.xoff_cpu                 (xoff_cpu               ),

.xon_cpu                  (xon_cpu                ),

 //MAC_rx_flow            (//MAC_rx_flow          ),

.pause_quanta             (pause_quanta           ),

.pause_quanta_val         (pause_quanta_val       ),

 //MAC_tx_ctrl            (//MAC_tx_ctrl          ),

.pause_apply              (pause_apply            ),

.pause_quanta_sub         (pause_quanta_sub       ),

.xoff_gen                 (xoff_gen               ),

.xoff_gen_complete        (xoff_gen_complete      ),

.xon_gen                  (xon_gen                ),

.xon_gen_complete         (xon_gen_complete       )

);

`ifdef MAC_SOURCE_REPLACE_EN

MAC_tx_addr_add U_MAC_tx_addr_add(

.Reset                    (Reset                  ),

.Clk                      (Clk                    ),

.MAC_tx_addr_rd           (MAC_tx_addr_rd         ),

.MAC_tx_addr_init         (MAC_tx_addr_init       ),

.MAC_tx_addr_data         (MAC_tx_addr_data       ),

 //CPU                    (//CPU                  ),

.MAC_add_prom_data        (MAC_add_prom_data      ),

.MAC_add_prom_add         (MAC_add_prom_add       ),

.MAC_add_prom_wr          (MAC_add_prom_wr        )

);

`else

assign MAC_tx_addr_data=0;

`endif

MAC_tx_FF U_MAC_tx_FF(

.Reset                    (Reset                  ),

.Clk_MAC                  (Clk                    ),

.Clk_SYS                  (Clk_user               ),

 //MAC_rx_ctrl interf     (//MAC_rx_ctrl interf   ),

.Fifo_data                (Fifo_data              ),

.Fifo_rd                  (Fifo_rd                ),

.Fifo_rd_finish           (Fifo_rd_finish         ),

.Fifo_rd_retry            (Fifo_rd_retry          ),

.Fifo_eop                 (Fifo_eop               ),

.Fifo_da                  (Fifo_da                ),

.Fifo_ra                  (Fifo_ra                ),

.Fifo_data_err_empty      (Fifo_data_err_empty    ),

.Fifo_data_err_full       (Fifo_data_err_full     ),

 //user interface         (//user interface       ),

.Tx_mac_wa                (Tx_mac_wa              ),

.Tx_mac_wr                (Tx_mac_wr              ),

.Tx_mac_data              (Tx_mac_data            ),

.Tx_mac_BE                (Tx_mac_BE              ),

.Tx_mac_sop               (Tx_mac_sop             ),

.Tx_mac_eop               (Tx_mac_eop             ),

 //host interface         (//host interface       ),

.FullDuplex               (FullDuplex             ),

.Tx_Hwmark                (Tx_Hwmark              ),

.Tx_Lwmark                (Tx_Lwmark              )

);

Ramdon_gen U_Ramdon_gen(

.Reset                    (Reset                  ),

.Clk                      (Clk                    ),

.Init                     (Random_init            ),

.RetryCnt                 (RetryCnt               ),

.Random_time_meet         (Random_time_meet       )

);

endmodule