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59 lines
1014 B
C
59 lines
1014 B
C
4 weeks ago
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/*
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* ModbusRTUCRC.h
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*
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* Author: Aleksey Gerasimenko
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* gerasimenko.aleksey.n@gmail.com
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*/
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#include <math.h>
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#include <stdint.h>
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#ifndef MODBUSRTU_MODBUSRTUCRC_H_
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#define MODBUSRTU_MODBUSRTUCRC_H_
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struct Uint16ByteField
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{
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uint16_t low: 8;
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uint16_t high: 8;
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};//Uint16ByteField
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union Uint16Register
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{
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uint16_t all;
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Uint16ByteField byte;
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Uint16Register():
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all(0)
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{}
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};//
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namespace MODBUSRTU
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{
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class ModbusRTUCRC
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{
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private:
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static const uint16_t m_table[256];
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private:
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Uint16Register m_crc_calculate;
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uint16_t m_table_crc_index;
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Uint16Register m_table_crc_value;
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uint16_t *m_start;
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uint16_t *m_end;
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public:
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ModbusRTUCRC();
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public:
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uint16_t calculate(uint16_t *start, uint16_t length);
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uint16_t calculate(uint16_t *start, uint16_t *end);
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uint16_t calculate(uint16_t databyte, uint16_t crc);
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private:
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inline void _while_cycle();
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};
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} /* namespace MODBUSRTU */
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#endif /* MODBUSRTU_MODBUSRTUCRC_H_ */
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