コード例 #1
0
ファイル: GsvData.cs プロジェクト: ErickBessa/gpstalk
        //=======================================================================

        //=======================================================================
        public static bool TryParse(string inputString, out GsvData gsvData)
        {
            try
            {
                gsvData = Parse(inputString);
                return(true);
            }
            catch
            {
                gsvData = null;
                return(false);
            }
        }
コード例 #2
0
        //=======================================================================

        //=======================================================================
        private static GpsReading ParseSentences(string[] sentences)
        {
            //---- declare vars
            GpsReading gpsReading = new GpsReading();

            //---- loop through each sentence
            for (int i = 0; i < sentences.Length; i++)
            {
                //---- if the sentence has a header and data
                if (sentences[i].Length > 6)
                {
                    switch (sentences[i].Trim().Substring(0, 6).ToUpper())
                    {
                    case "$GPGSA":
                        gpsReading.DopActiveSatellites = GsaData.Parse(sentences[i]);
                        break;

                    case "$GPGSV":
                        gpsReading.SatellitesInView.Add(GsvData.Parse(sentences[i]));
                        break;

                    case "$GPGGA":
                        gpsReading.FixedGpsData = GgaData.Parse(sentences[i]);
                        break;

                    case "$GPRMC":
                        gpsReading.Summary = RmcData.Parse(sentences[i]);
                        break;

                    case "$GPMSS":
                        break;

                    case "$GPVTG":
                        break;
                    }
                }
            }

            //---- return our parsed gps reading
            return(gpsReading);
        }
コード例 #3
0
ファイル: GsvData.cs プロジェクト: ErickBessa/gpstalk
        //=======================================================================
        #region -= static methods =-

        //=======================================================================
        public static GsvData Parse(string inputString)
        {
            //---- declare vars
            GsvData data       = new GsvData();
            string  dataString = inputString.Substring(0, inputString.IndexOf('*'));            // strip off the checksum

            string[] values = dataString.Split(',');

            //---- if we don't have 20 (header + 19), it's no good
            if (values.Length < 20)
            {
                return(data);
            }

            //---- number of messages
            data.MessageCount = int.Parse(values[1]);

            //---- message number
            data.MessageNumber = int.Parse(values[2]);

            //---- total number of satellites in view
            data.SatellitesInView = int.Parse(values[3]);

            //---- loop through the satellites (up to 4)
            for (int i = 0; i < 4; i++)
            {
                //---- create a new satellite
                Satellite sat = new Satellite();

                //---- satellite information starts at index 4, goes for 4 lines, and then starts over (4-7), (8-11), (12-15), (16-19)
                int satIndex = (4 + (4 * i));

                //---- satellite ID
                sat.ID = (string.IsNullOrEmpty(values[satIndex]) ? 0 : int.Parse(values[satIndex]));

                //---- if we got a satellite
                if (sat.ID > 0)
                {
                    //---- elevation
                    sat.AngleOfElvation = (string.IsNullOrEmpty(values[satIndex + 1]) ? 0 : int.Parse(values[satIndex + 1]));

                    //---- azimuth
                    sat.Azimuth = (string.IsNullOrEmpty(values[satIndex + 2]) ? 0 : int.Parse(values[satIndex + 2]));

                    //---- signal strength
                    sat.SignalStrength = (string.IsNullOrEmpty(values[satIndex + 3]) ? 0 : int.Parse(values[satIndex + 3]));

                    //---- used in fix? [TODO: Verify this assumption of signal 00 is all right]
                    if (sat.SignalStrength > 0)
                    {
                        sat.UsedInPositionFix = true;
                    }
                    else
                    {
                        sat.UsedInPositionFix = false;
                    }

                    //---- add the sat
                    data.Satellites.Add(sat);
                }
            }

            //---- return
            return(data);

            //$GPGSV,1,1,13,02,02,213,,03,-3,000,,11,00,121,,14,13,172,05*67
            //1    = Total number of messages of this type in this cycle
            //2    = Message number
            //3    = Total number of SVs in view
            //4    = SV PRN number
            //5    = Elevation in degrees, 90 maximum
            //6    = Azimuth, degrees from true north, 000 to 359
            //7    = SNR, 00-99 dB (null when not tracking)
            //8-11 = Information about second SV, same as field 4-7
            //12-15= Information about third SV, same as field 4-7
            //16-19= Information about fourth SV, same as field 4-7
        }