113 lines
3.8 KiB
C
113 lines
3.8 KiB
C
/****************************************************************************
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* include/nuttx/crc8.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_CRC8_H
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#define __INCLUDE_NUTTX_CRC8_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Append full suffix to avoid the penitential symbol collision */
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#define crc8 crc8full
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: crc8part
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*
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* Description:
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* Continue CRC calculation on a part of the buffer using the polynomial
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* x^8+x^6+x^3+x^2+1 (Koopman, et al. "0xA6" poly).
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*
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****************************************************************************/
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uint8_t crc8part(FAR const uint8_t *src, size_t len, uint8_t crc8val);
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/****************************************************************************
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* Name: crc8
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*
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* Description:
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* Return an 8-bit CRC of the contents of the 'src' buffer, length 'len'
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* using the polynomial x^8+x^6+x^3+x^2+1 (Koopman, et al. "0xA6" poly).
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*
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****************************************************************************/
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uint8_t crc8(FAR const uint8_t *src, size_t len);
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/****************************************************************************
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* Name: crc8table
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*
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* Description:
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* Return a 8-bit CRC of the contents of the 'src' buffer, length 'len'
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* using a CRC with crc table used for calculation.
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*
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****************************************************************************/
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uint8_t crc8table(const uint8_t table[256], const uint8_t *src,
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size_t len, uint8_t crc8val);
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/****************************************************************************
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* Name: crc8ccitt
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*
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* Description:
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* Return an 8-bit CRC of the contents of the 'src' buffer, length 'len'
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* using the polynomial x^8+x^2+x^1+1 (aka "0x07" poly).
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*
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****************************************************************************/
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uint8_t crc8ccitt(FAR const uint8_t *src, size_t len);
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/****************************************************************************
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* Name: crc8part
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*
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* Description:
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* Continue CRC calculation on a part of the buffer using the polynomial
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* x^8+x^2+x^1+1 (aka "0x07" poly).
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*
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****************************************************************************/
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uint8_t crc8ccittpart(FAR const uint8_t *src, size_t len, uint8_t crc8val);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_NUTTX_CRC8_H */
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