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45 lines
1.9 KiB
C
45 lines
1.9 KiB
C
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/***************************************************************************
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rlmodbusclient.h - description
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-------------------
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begin : Wed Jan 07 2004
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copyright : (C) 2004 by R. Lehrig
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email : lehrig@t-online.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as *
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* published by the Free Software Foundation *
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* *
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***************************************************************************/
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#ifndef _RL_MODBUS_CLIENT_H_
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#define _RL_MODBUS_CLIENT_H_
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#include "rldefine.h"
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#include "rlmodbus.h"
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#include "rlmailbox.h"
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#include "rlsharedmemory.h"
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/*! <pre>
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This class is for data aqusition over a modbus daemon as created by pvdevelop.
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It communicates over a shared memory and a mailbox according to the pvbrowser principle.
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</pre> */
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class rlModbusClient : public rlMailbox, public rlSharedMemory
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{
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public:
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rlModbusClient(const char *mbxname, const char *shmname, int shmsize);
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virtual ~rlModbusClient();
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int write(int slave, int function, const unsigned char *data, int len);
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int writeSingleCoil(int slave, int adr, int value);
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int writeMultipleCoils(int slave, int adr, const unsigned char *values, int num_coils);
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int writePresetSingleRegister(int slave, int adr, int value);
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int writePresetMultipleRegisters(int slave, int adr, const int *values, int num_values);
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int readBit(int offset, int number);
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int readByte(int offset, int number);
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int readShort(int offset, int number);
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};
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#endif
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