mirror of https://github.com/ArduPilot/ardupilot
63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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interfaces to ArduPilot collection of CRCs.
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*/
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#pragma once
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#include <stdint.h>
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uint16_t crc_crc4(uint16_t *data);
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uint8_t crc_crc8(const uint8_t *p, uint8_t len);
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uint8_t crc8_generic(const uint8_t *buf, const uint16_t buf_len, const uint8_t polynomial); // CRC8 that does not use a lookup table for generic polynomials
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uint8_t crc8_dvb_s2(uint8_t crc, uint8_t a);
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uint8_t crc8_dvb(uint8_t crc, uint8_t a, uint8_t seed);
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uint8_t crc8_dvb_s2_update(uint8_t crc, const void *data, uint32_t length);
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uint8_t crc8_dvb_update(uint8_t crc, const uint8_t* buf, const uint16_t buf_len);
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uint8_t crc8_maxim(const uint8_t *data, uint16_t length);
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uint8_t crc8_sae(const uint8_t *data, uint16_t length);
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uint16_t crc_xmodem_update(uint16_t crc, uint8_t data);
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uint16_t crc_xmodem(const uint8_t *data, uint16_t len);
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uint32_t crc_crc32(uint32_t crc, const uint8_t *buf, uint32_t size);
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uint32_t crc32_small(uint32_t crc, const uint8_t *buf, uint32_t size);
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uint32_t crc_crc24(const uint8_t *bytes, uint16_t len);
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uint16_t crc_crc16_ibm(uint16_t crc_accum, uint8_t *data_blk_ptr, uint16_t data_blk_size);
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// checksum used by SPORT/FPort
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uint8_t crc_sum8(const uint8_t *p, uint8_t len);
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// Copyright (C) 2010 Swift Navigation Inc.
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// Contact: Fergus Noble <fergus@swift-nav.com>
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uint16_t crc16_ccitt(const uint8_t *buf, uint32_t len, uint16_t crc);
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// CRC16_CCITT algorithm using the GDL90 parser method which is non-standard
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// https://www.faa.gov/nextgen/programs/adsb/archival/media/gdl90_public_icd_reva.pdf
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uint16_t crc16_ccitt_GDL90(const uint8_t *buf, uint32_t len, uint16_t crc);
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uint16_t calc_crc_modbus(const uint8_t *buf, uint16_t len);
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uint16_t crc_fletcher16(const uint8_t * buffer, uint32_t len);
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// generate 64bit FNV1a hash from buffer
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#define FNV_1_OFFSET_BASIS_64 14695981039346656037UL
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void hash_fnv_1a(uint32_t len, const uint8_t* buf, uint64_t* hash);
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// CRC-64-WE using the polynomial of 0x42F0E1EBA9EA3693
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uint64_t crc_crc64(const uint32_t *data, uint16_t num_words);
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// return the parity of byte - "1" if there is an odd number of bits
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// set, "0" if there is an even number of bits set
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uint8_t parity(uint8_t byte);
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