DSC_FreqCounter.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2008, Copyright University Corporation for Atmospheric Research
 **
 ** This program is free software; you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation; either version 2 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/
#ifndef NIDAS_DYNLD_DSC_FREQCOUNTER_H
#define NIDAS_DYNLD_DSC_FREQCOUNTER_H

#include <nidas/core/DSMSensor.h>
#include <nidas/core/Parameter.h>
#include <nidas/util/EndianConverter.h>

namespace nidas { namespace dynld {

using namespace nidas::core;

class DSC_FreqCounter : public DSMSensor {

public:

    DSC_FreqCounter();
    ~DSC_FreqCounter();

    IODevice* buildIODevice() throw(nidas::util::IOException);

    SampleScanner* buildSampleScanner()
        throw(nidas::util::InvalidParameterException);

    void open(int flags) throw(nidas::util::IOException,
        nidas::util::InvalidParameterException);

    void validate() throw(nidas::util::InvalidParameterException);

    void init() throw(nidas::util::InvalidParameterException);

    void printStatus(std::ostream& ostr) throw();

    double calculatePeriodUsec(const Sample*) const;

    double calculatePeriodUsec(unsigned int npulses, unsigned int tics) const;

    bool process(const Sample*,std::list<const Sample*>& result)
        throw();

    int getSamplePeriodMsec() const
    {
        return _msecPeriod;
    }


protected:

    virtual void readParams(const std::list<const Parameter*>& params)
        throw(nidas::util::InvalidParameterException);

    dsm_sample_id_t _sampleId;

    int _nvars;

    int _msecPeriod;

    int _numPulses;

    double _clockRate;

    const nidas::util::EndianConverter* _cvtr;

private:

    DSC_FreqCounter(const DSC_FreqCounter&);

    DSC_FreqCounter& operator=(const DSC_FreqCounter&);

};

}}  // namespace nidas namespace dynld

#endif