ModbusAnalyzer.h

#ifndef MODBUS_ANALYZER_H
#define MODBUS_ANALYZER_H

#include <Analyzer.h>
#include "ModbusAnalyzerResults.h"
#include "ModbusSimulationDataGenerator.h"
#include "ModbusAnalyzerModbusExtension.h"

#include <stdio.h>
#include <string.h>

class ModbusAnalyzerSettings;
class ModbusAnalyzer : public Analyzer2
{
  public:
    ModbusAnalyzer();
    virtual ~ModbusAnalyzer();
    virtual void SetupResults();
    virtual void WorkerThread();

    virtual U32 GenerateSimulationData( U64 newest_sample_requested, U32 sample_rate, SimulationChannelDescriptor** simulation_channels );
    virtual U32 GetMinimumSampleRateHz();

    virtual const char* GetAnalyzerName() const;
    virtual bool NeedsRerun();


#pragma warning( push )
#pragma warning(                                                                                                                           \
    disable : 4251 ) // warning C4251: 'ModbusAnalyzer::<...>' : class <...> needs to have dll-interface to be used by clients of class

  protected: // functions
    void ComputeSampleOffsets();
    U64 GetNextByteModbus( U32 num_bits, U64 bit_mask, U64& frame_starting_sample, U64& frame_ending_sample );
    int ASCII2INT( char value );

  protected: // vars
    std::auto_ptr<ModbusAnalyzerSettings> mSettings;
    std::auto_ptr<ModbusAnalyzerResults> mResults;
    AnalyzerChannelData* mModbus;

    ModbusSimulationDataGenerator mSimulationDataGenerator;
    bool mSimulationInitilized;

    // Modbus analysis vars:
    U32 mSampleRateHz;
    std::vector<U32> mSampleOffsets;
    U32 mParityBitOffset;
    U32 mStartOfStopBitOffset;
    BitState mBitLow;
    BitState mBitHigh;

    // Checksum caluclations for Modbus
    U16 crc_tab16[ 256 ];
    void init_crc16_tab( void );
    U16 update_CRC( U16 crc, U8 c );

#pragma warning( pop )
};

extern "C" ANALYZER_EXPORT const char* __cdecl GetAnalyzerName();
extern "C" ANALYZER_EXPORT Analyzer* __cdecl CreateAnalyzer();
extern "C" ANALYZER_EXPORT void __cdecl DestroyAnalyzer( Analyzer* analyzer );

#endif // MODBUS_ANALYZER_H