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crc16.h 1.47 KB
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/* CCITT 16-bit CRC table and calculation macro */

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 * Copyright Rob Swindell - http://www.synchro.net/copyright.html			*
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 * This library is free software; you can redistribute it and/or			*
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#ifndef _CRC16_H_
#define _CRC16_H_

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#include "gen_defs.h"

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#ifdef __cplusplus
extern "C" {
#endif

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extern uint16_t crc16tbl[];
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uint16_t crc16(const char* data, size_t len);
uint16_t icrc16(uint16_t crc, const char* data, size_t len);
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#ifdef __cplusplus
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}
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#endif

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#define ucrc16(ch,crc) (crc16tbl[((crc>>8)&0xff)^(unsigned char)ch]^(crc << 8))

#endif	/* Don't add anything after this line */