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   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package altosui;
  19
  20 import java.lang.*;
  21 import java.text.*;
  22
  23 public class AltosGPS {
  24         public class AltosGPSSat {
  25                 int     svid;
  26                 int     c_n0;
  27         }
  28
  29         int     nsat;
  30         boolean locked;
  31         boolean connected;
  32         boolean date_valid;
  33         double  lat;            /* degrees (+N -S) */
  34         double  lon;            /* degrees (+E -W) */
  35         int     alt;            /* m */
  36         int     year;
  37         int     month;
  38         int     day;
  39         int     hour;
  40         int     minute;
  41         int     second;
  42
  43         int     gps_extended;   /* has extra data */
  44         double  ground_speed;   /* m/s */
  45         int     course;         /* degrees */
  46         double  climb_rate;     /* m/s */
  47         double  hdop;           /* unitless? */
  48         int     h_error;        /* m */
  49         int     v_error;        /* m */
  50
  51         AltosGPSSat[] cc_gps_sat;       /* tracking data */
  52
  53         void ParseGPSDate(String date) throws ParseException {
  54                 String[] ymd = date.split("-");
  55                 if (ymd.length != 3)
  56                         throw new ParseException("error parsing GPS date " + date + " got " + ymd.length, 0);
  57                 year = AltosParse.parse_int(ymd[0]);
  58                 month = AltosParse.parse_int(ymd[1]);
  59                 day = AltosParse.parse_int(ymd[2]);
  60         }
  61
  62         void ParseGPSTime(String time) throws ParseException {
  63                 String[] hms = time.split(":");
  64                 if (hms.length != 3)
  65                         throw new ParseException("Error parsing GPS time " + time + " got " + hms.length, 0);
  66                 hour = AltosParse.parse_int(hms[0]);
  67                 minute = AltosParse.parse_int(hms[1]);
  68                 second = AltosParse.parse_int(hms[2]);
  69         }
  70
  71         void ClearGPSTime() {
  72                 year = month = day = 0;
  73                 hour = minute = second = 0;
  74         }
  75
  76         public AltosGPS(String[] words, int i, int version) throws ParseException {
  77                 AltosParse.word(words[i++], "GPS");
  78                 nsat = AltosParse.parse_int(words[i++]);
  79                 AltosParse.word(words[i++], "sat");
  80
  81                 connected = false;
  82                 locked = false;
  83                 lat = lon = 0;
  84                 alt = 0;
  85                 ClearGPSTime();
  86                 if ((words[i]).equals("unlocked")) {
  87                         connected = true;
  88                         i++;
  89                 } else if ((words[i]).equals("not-connected")) {
  90                         i++;
  91                 } else if (words.length >= 40) {
  92                         locked = true;
  93                         connected = true;
  94
  95                         if (version > 1)
  96                                 ParseGPSDate(words[i++]);
  97                         else
  98                                 year = month = day = 0;
  99                         ParseGPSTime(words[i++]);
 100                         lat = AltosParse.parse_coord(words[i++]);
 101                         lon = AltosParse.parse_coord(words[i++]);
 102                         alt = AltosParse.parse_int(words[i++]);
 103                         if (version > 1 || (i < words.length && !words[i].equals("SAT"))) {
 104                                 ground_speed = AltosParse.parse_double(AltosParse.strip_suffix(words[i++], "m/s(H)"));
 105                                 course = AltosParse.parse_int(words[i++]);
 106                                 climb_rate = AltosParse.parse_double(AltosParse.strip_suffix(words[i++], "m/s(V)"));
 107                                 hdop = AltosParse.parse_double(AltosParse.strip_suffix(words[i++], "(hdop)"));
 108                                 h_error = AltosParse.parse_int(words[i++]);
 109                                 v_error = AltosParse.parse_int(words[i++]);
 110                         }
 111                 } else {
 112                         i++;
 113                 }
 114                 if (i < words.length) {
 115                         AltosParse.word(words[i++], "SAT");
 116                         int tracking_channels = 0;
 117                         if (words[i].equals("not-connected"))
 118                                 tracking_channels = 0;
 119                         else
 120                                 tracking_channels = AltosParse.parse_int(words[i]);
 121                         i++;
 122                         cc_gps_sat = new AltosGPS.AltosGPSSat[tracking_channels];
 123                         for (int chan = 0; chan < tracking_channels; chan++) {
 124                                 cc_gps_sat[chan] = new AltosGPS.AltosGPSSat();
 125                                 cc_gps_sat[chan].svid = AltosParse.parse_int(words[i++]);
 126                                 /* Older versions included SiRF status bits */
 127                                 if (version < 2)
 128                                         i++;
 129                                 cc_gps_sat[chan].c_n0 = AltosParse.parse_int(words[i++]);
 130                         }
 131                 } else
 132                         cc_gps_sat = new AltosGPS.AltosGPSSat[0];
 133         }
 134
 135         public void set_latitude(int in_lat) {
 136                 lat = in_lat / 10.0e7;
 137         }
 138
 139         public void set_longitude(int in_lon) {
 140                 lon = in_lon / 10.0e7;
 141         }
 142
 143         public void set_time(int hour, int minute, int second) {
 144                 hour = hour;
 145                 minute = minute;
 146                 second = second;
 147         }
 148
 149         public void set_date(int year, int month, int day) {
 150                 year = year;
 151                 month = month;
 152                 day = day;
 153         }
 154
 155         public void set_flags(int flags) {
 156                 flags = flags;
 157         }
 158
 159         public void set_altitude(int altitude) {
 160                 altitude = altitude;
 161         }
 162
 163         public void add_sat(int svid, int c_n0) {
 164                 if (cc_gps_sat == null) {
 165                         cc_gps_sat = new AltosGPS.AltosGPSSat[1];
 166                 } else {
 167                         AltosGPSSat[] new_gps_sat = new AltosGPS.AltosGPSSat[cc_gps_sat.length + 1];
 168                         for (int i = 0; i < cc_gps_sat.length; i++)
 169                                 new_gps_sat[i] = cc_gps_sat[i];
 170                         cc_gps_sat = new_gps_sat;
 171                 }
 172                 AltosGPS.AltosGPSSat    sat = new AltosGPS.AltosGPSSat();
 173                 sat.svid = svid;
 174                 sat.c_n0 = c_n0;
 175                 cc_gps_sat[cc_gps_sat.length - 1] = sat;
 176         }
 177
 178         public AltosGPS() {
 179                 ClearGPSTime();
 180                 cc_gps_sat = null;
 181         }
 182
 183         public AltosGPS(AltosGPS old) {
 184                 nsat = old.nsat;
 185                 locked = old.locked;
 186                 connected = old.connected;
 187                 date_valid = old.date_valid;
 188                 lat = old.lat;          /* degrees (+N -S) */
 189                 lon = old.lon;          /* degrees (+E -W) */
 190                 alt = old.alt;          /* m */
 191                 year = old.year;
 192                 month = old.month;
 193                 day = old.day;
 194                 hour = old.hour;
 195                 minute = old.minute;
 196                 second = old.second;
 197
 198                 gps_extended = old.gps_extended;        /* has extra data */
 199                 ground_speed = old.ground_speed;        /* m/s */
 200                 course = old.course;            /* degrees */
 201                 climb_rate = old.climb_rate;    /* m/s */
 202                 hdop = old.hdop;                /* unitless? */
 203                 h_error = old.h_error;  /* m */
 204                 v_error = old.v_error;  /* m */
 205
 206                 if (old.cc_gps_sat != null) {
 207                         cc_gps_sat = new AltosGPSSat[old.cc_gps_sat.length];
 208                         for (int i = 0; i < old.cc_gps_sat.length; i++) {
 209                                 cc_gps_sat[i] = new AltosGPSSat();
 210                                 cc_gps_sat[i].svid = old.cc_gps_sat[i].svid;
 211                                 cc_gps_sat[i].c_n0 = old.cc_gps_sat[i].c_n0;
 212                         }
 213                 }
 214         }
 215 }