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https://github.com/DCC-EX/CommandStation-EX.git
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52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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#ifndef ModbusADU_h
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#define ModbusADU_h
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#include "Arduino.h"
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class ModbusADU {
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public:
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uint8_t *rtu = _adu + 6;
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uint8_t *tcp = _adu;
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uint8_t *pdu = _adu + 7;
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uint8_t *data = _adu + 8;
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void setTransactionId(uint16_t transactionId);
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void setProtocolId(uint16_t protocolId);
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void setLength(uint16_t length);
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void setUnitId(uint8_t unitId);
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void setFunctionCode(uint8_t functionCode);
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void setDataRegister(uint8_t index, uint16_t value);
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void setRtuLen(uint16_t rtuLen);
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void setTcpLen(uint16_t tcpLen);
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void setPduLen(uint16_t pduLen);
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void setDataLen(uint16_t dataLen);
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uint16_t getTransactionId();
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uint16_t getProtocolId();
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uint16_t getLength();
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uint8_t getUnitId();
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uint8_t getFunctionCode();
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uint16_t getDataRegister(uint8_t index);
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uint16_t getRtuLen();
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uint16_t getTcpLen();
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uint16_t getPduLen();
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uint16_t getDataLen();
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void updateCrc();
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bool crcGood();
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void prepareExceptionResponse(uint8_t exceptionCode);
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private:
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uint8_t _adu[262];
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void _setRegister(uint8_t *buf, uint16_t index, uint16_t value);
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uint16_t _getRegister(uint8_t *buf, uint16_t index);
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uint16_t _calculateCrc(uint16_t len);
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};
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uint16_t div8RndUp(uint16_t value);
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#endif
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