errloc.v

来自「NANDFlashController.zip」· Verilog 代码 · 共 88 行

//-------------------------------------------------------------------------
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//-------------------------------------------------------------------------
//  Copyright (c) 2006-2010 by Lattice Semiconductor Corporation      
// 
//-------------------------------------------------------------------------
// Permission:
//
//   Lattice Semiconductor grants permission to use this code for use
//   in synthesis for any Lattice programmable logic product.  Other
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//   portion is strictly prohibited.
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// Disclaimer:
//
//   This VHDL or Verilog source code is intended as a design reference
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//   consistency and functionality through the use of formal
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//-------------------------------------------------------------------------
//
// Revision History :
// --------------------------------------------------------------------
//   Ver  :| Author :| Mod. Date :| Changes Made:
//   V01.0:| A.Y    :| 09/30/06  :| Initial ver
//   v01.1:| J.T    :| 06/21/09  :| juse (7,4) hamming code
// --------------------------------------------------------------------
//
// 
//Description of module:
//--------------------------------------------------------------------------------
// (7,4) hamming code detect
// --------------------------------------------------------------------
`timescale 1 ns / 1 fs

module ErrLoc(
      clk,
      Res,
      F_ecc_data ,// -- ecc byte read fm flash
      WrECC,


      ECC_status
);
  input    clk;
  input    Res;
  input  [6:0]  F_ecc_data ; //-- ecc byte read fm flash
  input    WrECC ;
  
  output reg ECC_status;

wire check1,check2,check3;
reg [6:0] din;

always@(posedge clk)
 if (Res)
  din <= 8'h00;
 else if (WrECC)
  din <= F_ecc_data;
  
assign check1=din[6]^din[4]^din[2]^din[0];
assign check2=din[5]^din[4]^din[1]^din[0];
assign check3=din[3]^din[2]^din[1]^din[0];

always@(posedge clk)
 if (Res)
  ECC_status <= 1'h0;
 else
  ECC_status <= (check1 | check2 | check3);


endmodule