GPS_NMEA_Serial.h

Go to the documentation of this file.

// -*- 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
 **
 ** 2005, 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 NIDIS_DYNLD_GPS_NMEA_SERIAL_H
#define NIDIS_DYNLD_GPS_NMEA_SERIAL_H
 
#include <nidas/core/SerialSensor.h>
 
namespace nidas { namespace dynld {
 
    using namespace nidas::core;
 
class GPS_NMEA_Serial: public SerialSensor
{
public:
 
    GPS_NMEA_Serial();
 
    void validate();
 
    bool process(const Sample* samp,std::list<const Sample*>& results)
        throw();
 
    static bool
    checksumOK(const char* rec,int len);
 
    static bool
    findChecksum(char& checksum, const char* rec, int len);
 
    static char
    calcChecksum(const char* rec, int len);
 
    static void
    appendChecksum(char* rec, int len, int maxlen);
 
    SampleScanner* buildSampleScanner();
 
    dsm_time_t parseGGA(const char* input,double *dout,int nvars,dsm_time_t tt) 
        throw();
 
    dsm_time_t parseRMC(const char* input,double *dout,int nvars,dsm_time_t tt)
        throw();
 
    dsm_time_t parseHDT(const char* input,double *dout,int nvars,dsm_time_t tt)
        throw();
 
protected:
 
    dsm_time_t _ttgps;
 
    int _ggaNvars;
 
    dsm_sample_id_t _ggaId;
 
    int _rmcNvars;
 
    dsm_sample_id_t _rmcId;
 
    int _hdtNvars;
 
    dsm_sample_id_t _hdtId;
 
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int GGA_SAMPLE_ID;
#else
    static const int GGA_SAMPLE_ID = 1;
#endif
 
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int RMC_SAMPLE_ID;
#else
    static const int RMC_SAMPLE_ID = 2;
#endif
 
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int HDT_SAMPLE_ID;
#else
    static const int HDT_SAMPLE_ID = 3;
#endif
 
    unsigned int _badChecksums;
    unsigned int _badChecksumsCount;
    
    std::map<int,std::string> _allowedSampleIds;
};
 
}}  // namespace nidas namespace dynld
 
#endif