Subversion Repositories usb_fpga_2_14

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//   ____  ____
//  /   /\/   /
// /___/  \  /    Vendor: Xilinx
// \   \   \/     Version: %version
//  \   \         Application: MIG
//  /   /         Filename: tg_status.v
// /___/   /\     Date Last Modified: 
// \   \  /  \    Date Created: 
//  \___\/\___\
//
//Device: Spartan6
//Design Name: DDR/DDR2/DDR3/LPDDR 
//Purpose:  This module compare the memory read data agaisnt compare data that generated from data_gen module.
//          Error signal will be asserted if the comparsion is not equal.
//Reference:
//Revision History:
//*****************************************************************************
 
`timescale 1ps/1ps
 
 
module tg_status #(
   parameter TCQ           = 100,  
 
   parameter DWIDTH = 32
    )
    (
 
 
   input                            clk_i  ,        
   input                            rst_i ,
   input                            manual_clear_error,
   input                            data_error_i ,  
   input [DWIDTH-1:0]               cmp_data_i,     
   input [DWIDTH-1:0]               rd_data_i ,     
   input [31:0]                     cmp_addr_i ,    
   input [5:0]                      cmp_bl_i ,      
   input                            mcb_cmd_full_i ,
   input                            mcb_wr_full_i,  
   input                            mcb_rd_empty_i, 
   output reg [64 + (2*DWIDTH - 1):0]   error_status,   
   output                           error                  
  );
 
reg data_error_r;
reg error_set;
assign  error = error_set;
 
always @ (posedge clk_i)
    data_error_r <= #TCQ  data_error_i;
 
always @ (posedge clk_i)
begin
 
if (rst_i || manual_clear_error) begin
   error_status <= #TCQ  'b0;
   error_set    <= #TCQ  1'b0;
end
else begin
  // latch the first error only
  if (data_error_i && ~data_error_r && ~error_set ) begin
     error_status[31:0]  <= #TCQ  cmp_addr_i;
     error_status[37:32] <= #TCQ  cmp_bl_i;
     error_status[40] <= #TCQ  mcb_cmd_full_i;
     error_status[41] <= #TCQ  mcb_wr_full_i;
     error_status[42] <= #TCQ  mcb_rd_empty_i;
     error_set <= #TCQ  1'b1;
     error_status[64 + (DWIDTH - 1)  :64]           <= #TCQ  cmp_data_i;
     error_status[64 + (2*DWIDTH - 1):64 + DWIDTH]  <= #TCQ  rd_data_i;
 
  end
 
  error_status[39:38]  <= #TCQ  'b0;    // reserved
  error_status[63:43] <= #TCQ  'b0;    // reserved
 
 
end end
 
endmodule