| /**************************************************************************** |
| * include/crc8.h |
| * |
| * Copyright (C) 2014 Ken Pettit. All rights reserved. |
| * Author: Ken Pettit <pettitkd@gmail.com> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * 3. Neither the name NuttX nor the names of its contributors may be |
| * used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __INCLUDE_CRC8_H |
| #define __INCLUDE_CRC8_H |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <sys/types.h> |
| #include <stdint.h> |
| |
| /**************************************************************************** |
| * Public Function Prototypes |
| ****************************************************************************/ |
| |
| #ifdef __cplusplus |
| #define EXTERN extern "C" |
| extern "C" |
| { |
| #else |
| #define EXTERN extern |
| #endif |
| |
| /**************************************************************************** |
| * Name: crc8part |
| * |
| * Description: |
| * Continue CRC calculation on a part of the buffer using the polynomial |
| * x^8+x^6+x^3+x^2+1 (Koopman, et al. "0xA6" poly). |
| * |
| ****************************************************************************/ |
| |
| uint8_t crc8part(FAR const uint8_t *src, size_t len, uint8_t crc8val); |
| |
| /**************************************************************************** |
| * Name: crc8 |
| * |
| * Description: |
| * Return an 8-bit CRC of the contents of the 'src' buffer, length 'len' |
| * using the polynomial x^8+x^6+x^3+x^2+1 (Koopman, et al. "0xA6" poly). |
| * |
| ****************************************************************************/ |
| |
| uint8_t crc8(FAR const uint8_t *src, size_t len); |
| |
| /**************************************************************************** |
| * Name: crc8ccitt |
| * |
| * Description: |
| * Return an 8-bit CRC of the contents of the 'src' buffer, length 'len' |
| * using the polynomial x^8+x^2+x^1+1 (aka "0x07" poly). |
| * |
| ****************************************************************************/ |
| |
| uint8_t crc8ccitt(FAR const uint8_t *src, size_t len); |
| |
| #undef EXTERN |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* __INCLUDE_CRC8_H */ |
