hamming.h

at91sam9263操作NAND FLASH代码

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
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 * Copyright (c) 2008, Atmel Corporation
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#ifndef HAMMING_H
#define HAMMING_H

//------------------------------------------------------------------------------
//         Defines
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// \page "Hamming Code Errors"
/// These are the possible errors when trying to verify a block of data encoded
/// using a Hamming code:
/// 
/// !Errors:
///  - Hamming_ERROR_SINGLEBIT
///  - Hamming_ERROR_ECC
///  - Hamming_ERROR_MULTIPLEBITS

/// A single bit was incorrect but has been recovered.
#define Hamming_ERROR_SINGLEBIT         1

/// The original code has been corrupted.
#define Hamming_ERROR_ECC               2

/// Multiple bits are incorrect in the data and they cannot be corrected.
#define Hamming_ERROR_MULTIPLEBITS      3
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------

extern void Hamming_Compute256x(
    const unsigned char *data,
    unsigned int size,
    unsigned char *code);

extern unsigned char Hamming_Verify256x(
    unsigned char *data,
    unsigned int size,
    const unsigned char *code);

#endif //#ifndef HAMMING_H