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//*****************************************************************************
//   ____  ____
//  /   /\/   /
// /___/  \  /   Vendor		    : Xilinx
// \   \   \/    Version            : 3.6.1
//  \   \        Application	    : MIG
//  /   /        Filename	    : ddr_data_path_0.v
// /___/   /\    Date Last Modified : $Date: 2010/11/26 18:25:41 $
// \   \  /  \   Date Created	    : Mon May 2 2005
//  \___\/\___\
// Device	: Spartan-3/3A/3A-DSP
// Design Name	: DDR2 SDRAM
// Purpose	: This module has the write and read data paths for the
//                DDR2 memory interface. The write data along with write enable
//                signals are forwarded to the DDR IOB FFs. The read data is
//                captured in CLB FFs and finally input to FIFOs.
//*****************************************************************************
 
`include "../rtl/ddr_parameters_0.v"
`timescale 1ns/100ps
module ddr_data_path_0
  (
   input [((`DATA_WIDTH*2)-1):0]       user_input_data,
   input [((`DATA_MASK_WIDTH*2) -1):0] user_data_mask,
   input                               clk,
   input                               clk90,
   input                               reset,
   input                               reset90,
   input                               write_enable,
   input                               rst_dqs_div_in,
   input [4:0]                         delay_sel,
   input [(`DATA_WIDTH-1):0]           dq,
   input [(`DATA_STROBE_WIDTH-1):0]    dqs_int_delay_in,
   input                               read_fifo_rden, // Added new signal
   output                              u_data_val,
   output [((`DATA_WIDTH*2)-1):0]      user_output_data,
   output                              write_en_val,
   output [((`DATA_MASK_WIDTH)-1):0]   data_mask_f,
   output [((`DATA_MASK_WIDTH)-1):0]   data_mask_r,
   output [(`DATA_WIDTH-1):0]          write_data_falling,
   output [(`DATA_WIDTH-1):0]          write_data_rising,
   //debug_signals
   input [4:0]				vio_out_dqs,
   input 				vio_out_dqs_en,
   input [4:0]                          vio_out_rst_dqs_div,
   input                                vio_out_rst_dqs_div_en
   );
 
   wire  [(4*`DATA_STROBE_WIDTH)-1:0] fifo_0_wr_addr;           
   wire  [(4*`DATA_STROBE_WIDTH)-1:0] fifo_1_wr_addr;   
   wire  [(`DATA_STROBE_WIDTH-1):0]   dqs_delayed_col0;
   wire  [(`DATA_STROBE_WIDTH-1):0]   dqs_delayed_col1;
   wire  [(`DATA_STROBE_WIDTH-1):0]   fifo_0_wr_en/* synthesis syn_keep=1 */;
   wire  [(`DATA_STROBE_WIDTH-1):0]   fifo_1_wr_en/* synthesis syn_keep=1 */;
 
   ddr_data_read_0 data_read0
     (
      .clk90             (clk90),
      .reset90           (reset90),
      .ddr_dq_in         (dq),
      .fifo_0_wr_en	 (fifo_0_wr_en),
      .fifo_1_wr_en	 (fifo_1_wr_en),
      .fifo_0_wr_addr    (fifo_0_wr_addr),
      .fifo_1_wr_addr    (fifo_1_wr_addr),
      .dqs_delayed_col0  (dqs_delayed_col0),
      .dqs_delayed_col1  (dqs_delayed_col1),
      .read_fifo_rden    (read_fifo_rden), 
      .user_output_data  (user_output_data),
      .u_data_val        (u_data_val)
      );
   ddr_data_read_controller_0  data_read_controller0
     (
      .clk                   (clk),
      .reset                 (reset), 
      .rst_dqs_div_in        (rst_dqs_div_in),
      .delay_sel             (delay_sel),
      .dqs_int_delay_in      (dqs_int_delay_in),
      .fifo_0_wr_en_val      (fifo_0_wr_en),
      .fifo_1_wr_en_val      (fifo_1_wr_en),
      .fifo_0_wr_addr_val    (fifo_0_wr_addr),
      .fifo_1_wr_addr_val    (fifo_1_wr_addr),
      .dqs_delayed_col0_val  (dqs_delayed_col0),
      .dqs_delayed_col1_val  (dqs_delayed_col1),
   //debug_signals
      .vio_out_dqs            (vio_out_dqs),   
      .vio_out_dqs_en         (vio_out_dqs_en),   
      .vio_out_rst_dqs_div    (vio_out_rst_dqs_div),
      .vio_out_rst_dqs_div_en (vio_out_rst_dqs_div_en)
      );
 
 
   ddr_data_write_0 data_write0
     (
      .user_input_data    (user_input_data),
      .user_data_mask     (user_data_mask),
      .clk90              (clk90),
      .write_enable       (write_enable),
      .write_en_val       (write_en_val),
      .write_data_falling (write_data_falling),
      .write_data_rising  (write_data_rising),
      .data_mask_f        (data_mask_f),
      .data_mask_r        (data_mask_r)
      );
 
 
endmodule