82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
// nmea.hxx -- NMEA protocol class
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//
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// Written by Curtis Olson, started November 1999.
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//
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// Copyright (C) 1999 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifndef _FG_NMEA_HXX
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#define _FG_NMEA_HXX
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#include <simgear/compiler.h>
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#include <string>
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#include "protocol.hxx"
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class FlightProperties;
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namespace NMEA
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{
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// supported NMEA messages
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const unsigned int GPRMC = (1<<0);
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const unsigned int GPGGA = (1<<1);
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const unsigned int GPGSA = (1<<2);
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const unsigned int SET = (GPRMC|GPGGA|GPGSA);
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}
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class FGNMEA : public FGProtocol {
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protected:
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char mBuf[FG_MAX_MSG_SIZE];
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unsigned int mLength;
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unsigned int mNmeaMessages;
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unsigned int mMaxReceiveLines;
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bool mBiDirectionalSupport;
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FlightProperties mFdm;
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const char* mLineFeed;
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string mNmeaSentence;
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void add_with_checksum(char *sentence, unsigned int buf_size);
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// process a single NMEA line
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void parse_line();
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// generate output message(s)
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virtual bool gen_message();
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// process a single NMEA sentence
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virtual void parse_message(const std::vector<std::string>& tokens);
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public:
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FGNMEA();
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~FGNMEA();
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// open hailing frequencies
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virtual bool open();
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// process work for this port
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virtual bool process();
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// close the channel
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virtual bool close();
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};
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#endif // _FG_NMEA_HXX
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