57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* $NetBSD: hamming.h,v 1.1 2011/02/26 18:07:31 ahoka Exp $ */
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/*
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HAMMING_H
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#define HAMMING_H
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#include "nand.h"
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/*-
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* These are the possible errors when trying to verify a block of data encoded
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* using a Hamming code:
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*
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* - HAMMING_ERROR_SINGLEBIT
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* - HAMMING_ERROR_ECC
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* - HAMMING_ERROR_MULTIPLEBITS
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*/
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/* A single bit was incorrect but has been recovered. */
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#define HAMMING_ERROR_SINGLEBIT NAND_ECC_CORRECTED
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/* The original code has been corrupted. */
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#define HAMMING_ERROR_ECC NAND_ECC_INVALID
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/* Multiple bits are incorrect in the data and they cannot be corrected. */
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#define HAMMING_ERROR_MULTIPLEBITS NAND_ECC_TWOBIT
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uint8_t hamming_correct_256(uint8_t *, const uint8_t *, const uint8_t *);
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void hamming_compute_256(const uint8_t *data, uint8_t *code);
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#endif /* HAMMING_H */
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