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https://github.com/DCC-EX/CommandStation-EX.git
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33 lines
803 B
C
33 lines
803 B
C
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#ifndef ModbusRTUComm_h
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#define ModbusRTUComm_h
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#include "Arduino.h"
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#include "ModbusADU.h"
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enum ModbusRTUCommError : uint8_t {
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MODBUS_RTU_COMM_SUCCESS = 0,
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MODBUS_RTU_COMM_TIMEOUT = 1,
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MODBUS_RTU_COMM_FRAME_ERROR = 2,
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MODBUS_RTU_COMM_CRC_ERROR = 3
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};
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class ModbusRTUComm {
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public:
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ModbusRTUComm(Stream& serial, int8_t dePin = -1, int8_t rePin = -1);
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void begin(unsigned long baud, uint32_t config = SERIAL_8N1);
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void setTimeout(unsigned long timeout);
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ModbusRTUCommError readAdu(ModbusADU& adu);
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void writeAdu(ModbusADU& adu);
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void clearRxBuffer();
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private:
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Stream& _serial;
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int8_t _dePin;
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int8_t _rePin;
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unsigned long _charTimeout;
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unsigned long _frameTimeout;
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unsigned long _postDelay = 0;
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unsigned long _readTimeout = 0;
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};
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#endif
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