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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
#pragma once
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//
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// FILE: CRC32.h
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// AUTHOR: Rob Tillaart
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// PURPOSE: Arduino class for CRC32
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// URL: https://github.com/RobTillaart/CRC
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#include "Arduino.h"
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#define CRC32_DEFAULT_POLYNOME 0x04C11DB7
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class CRC32
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{
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public:
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CRC32();
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// set parameters to default
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void reset(); // set all to constructor defaults
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void restart(); // reset crc with same parameters.
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// set parameters
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void setPolynome(uint32_t polynome) { _polynome = polynome; };
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void setStartXOR(uint32_t start) { _startMask = start; };
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void setEndXOR(uint32_t end) { _endMask = end; };
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void setReverseIn(bool reverseIn) { _reverseIn = reverseIn; };
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void setReverseOut(bool reverseOut) { _reverseOut = reverseOut; };
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void add(uint8_t value);
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void add(const uint8_t * array, uint8_t length);
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uint32_t getCRC(); // returns CRC
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uint32_t count() { return _count; };
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private:
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uint32_t _reverse(uint32_t value);
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uint8_t _reverse8(uint8_t value);
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void _update(uint8_t value);
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uint32_t _polynome;
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uint32_t _startMask;
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uint32_t _endMask;
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uint32_t _crc;
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bool _reverseIn;
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bool _reverseOut;
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bool _started;
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uint32_t _count;
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};
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// -- END OF FILE --
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