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https://github.com/DCC-EX/CommandStation-EX.git
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58 lines
2.4 KiB
C
58 lines
2.4 KiB
C
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#ifndef ModbusRTUMaster_h
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#define ModbusRTUMaster_h
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#include "Arduino.h"
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#include "ModbusADU.h"
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#include "ModbusRTUComm.h"
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enum ModbusRTUMasterError : uint8_t {
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MODBUS_RTU_MASTER_SUCCESS = 0,
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MODBUS_RTU_MASTER_INVALID_ID = 1,
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MODBUS_RTU_MASTER_INVALID_BUFFER = 2,
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MODBUS_RTU_MASTER_INVALID_QUANTITY = 3,
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MODBUS_RTU_MASTER_RESPONSE_TIMEOUT = 4,
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MODBUS_RTU_MASTER_FRAME_ERROR = 5,
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MODBUS_RTU_MASTER_CRC_ERROR = 6,
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MODBUS_RTU_MASTER_UNKNOWN_COMM_ERROR = 7,
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MODBUS_RTU_MASTER_UNEXPECTED_ID = 8,
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MODBUS_RTU_MASTER_EXCEPTION_RESPONSE = 9,
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MODBUS_RTU_MASTER_UNEXPECTED_FUNCTION_CODE = 10,
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MODBUS_RTU_MASTER_UNEXPECTED_LENGTH = 11,
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MODBUS_RTU_MASTER_UNEXPECTED_BYTE_COUNT = 12,
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MODBUS_RTU_MASTER_UNEXPECTED_ADDRESS = 13,
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MODBUS_RTU_MASTER_UNEXPECTED_VALUE = 14,
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MODBUS_RTU_MASTER_UNEXPECTED_QUANTITY = 15
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};
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class ModbusRTUMaster {
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public:
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ModbusRTUMaster(Stream& serial, int8_t dePin = -1, int8_t rePin = -1);
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void setTimeout(unsigned long timeout);
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void begin(unsigned long baud, uint32_t config = SERIAL_8N1);
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ModbusRTUMasterError readCoils(uint8_t id, uint16_t startAddress, bool buf[], uint16_t quantity);
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ModbusRTUMasterError readDiscreteInputs(uint8_t id, uint16_t startAddress, bool buf[], uint16_t quantity);
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ModbusRTUMasterError readHoldingRegisters(uint8_t id, uint16_t startAddress, uint16_t buf[], uint16_t quantity);
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ModbusRTUMasterError readInputRegisters(uint8_t id, uint16_t startAddress, uint16_t buf[], uint16_t quantity);
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ModbusRTUMasterError writeSingleCoil(uint8_t id, uint16_t address, bool value);
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ModbusRTUMasterError writeSingleHoldingRegister(uint8_t id, uint16_t address, uint16_t value);
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ModbusRTUMasterError writeMultipleCoils(uint8_t id, uint16_t startAddress, bool buf[], uint16_t quantity);
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ModbusRTUMasterError writeMultipleHoldingRegisters(uint8_t id, uint16_t startAddress, uint16_t buf[], uint16_t quantity);
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uint8_t getExceptionResponse();
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private:
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ModbusRTUComm _rtuComm;
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uint8_t _exceptionResponse = 0;
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ModbusRTUMasterError _readValues(uint8_t id, uint8_t functionCode, uint16_t startAddress, bool buf[], uint16_t quantity);
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ModbusRTUMasterError _readValues(uint8_t id, uint8_t functionCode, uint16_t startAddress, uint16_t buf[], uint16_t quantity);
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ModbusRTUMasterError _writeSingleValue(uint8_t id, uint8_t functionCode, uint16_t address, uint16_t value);
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ModbusRTUMasterError _translateCommError(ModbusRTUCommError commError);
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};
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#endif
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