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117 lines
4.7 KiB
C
117 lines
4.7 KiB
C
/****************************************************************************
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*
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* Copyright (c) 2015 PX4 Development Team. All rights reserved.
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* Author: Ben Dyer <ben_dyer@mac.com>
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* Pavel Kirienko <pavel.kirienko@zubax.com>
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* David Sidrane <david_s5@nscdg.com>
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#pragma once
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/****************************************************************************
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* Included Files
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****************************************************************************/
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define CRC16_INITIAL 0xFFFFu
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#define CRC16_OUTPUT_XOR 0x0000u
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#define CRC64_INITIAL 0xFFFFFFFFFFFFFFFFull
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#define CRC64_OUTPUT_XOR 0xFFFFFFFFFFFFFFFFull
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: crc16_add
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*
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* Description:
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* Use to calculates a CRC-16-CCITT using the polynomial of
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* 0x1021 by adding a value successive values.
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*
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* Input Parameters:
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* crc - The running total of the crc 16
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* value - The value to add
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*
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* Returned Value:
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* The current crc16 with the value processed.
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*
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****************************************************************************/
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uint16_t crc16_add(uint16_t crc, uint8_t value);
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/****************************************************************************
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* Name: crc16_signature
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*
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* Description:
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* Calculates a CRC-16-CCITT using the crc16_add
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* function
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*
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* Input Parameters:
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* initial - The Initial value to uses as the crc's starting point
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* length - The number of bytes to add to the crc
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* bytes - A pointer to any array of length bytes
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*
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* Returned Value:
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* The crc16 of the array of bytes
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*
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****************************************************************************/
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uint16_t crc16_signature(uint16_t initial, size_t length,
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const uint8_t *bytes);
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/****************************************************************************
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* Name: crc64_add_word
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*
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* Description:
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* Calculates a CRC-64-WE using the polynomial of 0x42F0E1EBA9EA3693
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* See http://reveng.sourceforge.net/crc-catalogue/17plus.htm#crc.cat-bits.64
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* Check: 0x62EC59E3F1A4F00A
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*
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* Input Parameters:
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* crc - The running total of the crc 64
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* value - The value to add
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*
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* Returned Value:
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* The current crc64 with the value processed.
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*
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****************************************************************************/
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uint64_t crc64_add_word(uint64_t crc, uint32_t value);
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