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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 import java.util.HashMap;
  23 import java.io.*;
  24
  25 public class AltosRecord {
  26         final static int        MISSING = 0x7fffffff;
  27
  28         static final int        seen_flight = 1;
  29         static final int        seen_sensor = 2;
  30         static final int        seen_temp_volt = 4;
  31         static final int        seen_deploy = 8;
  32         static final int        seen_gps_time = 16;
  33         static final int        seen_gps_lat = 32;
  34         static final int        seen_gps_lon = 64;
  35         int                     seen;
  36
  37         int     version;
  38         String  callsign;
  39         int     serial;
  40         int     flight;
  41         int     rssi;
  42         int     status;
  43         int     state;
  44         int     tick;
  45
  46         int     accel;
  47         int     pres;
  48         int     temp;
  49         int     batt;
  50         int     drogue;
  51         int     main;
  52
  53         int     ground_accel;
  54         int     ground_pres;
  55         int     accel_plus_g;
  56         int     accel_minus_g;
  57
  58         double  acceleration;
  59         double  speed;
  60         double  height;
  61
  62         int     flight_accel;
  63         int     flight_vel;
  64         int     flight_pres;
  65
  66         AltosGPS        gps;
  67
  68         double  time;   /* seconds since boost */
  69
  70         /*
  71          * Values for our MP3H6115A pressure sensor
  72          *
  73          * From the data sheet:
  74          *
  75          * Pressure range: 15-115 kPa
  76          * Voltage at 115kPa: 2.82
  77          * Output scale: 27mV/kPa
  78          *
  79          *
  80          * 27 mV/kPa * 2047 / 3300 counts/mV = 16.75 counts/kPa
  81          * 2.82V * 2047 / 3.3 counts/V = 1749 counts/115 kPa
  82          */
  83
  84         static final double counts_per_kPa = 27 * 2047 / 3300;
  85         static final double counts_at_101_3kPa = 1674.0;
  86
  87         static double
  88         barometer_to_pressure(double count)
  89         {
  90                 return ((count / 16.0) / 2047.0 + 0.095) / 0.009 * 1000.0;
  91         }
  92
  93         public double raw_pressure() {
  94                 if (pres == MISSING)
  95                         return MISSING;
  96                 return barometer_to_pressure(pres);
  97         }
  98
  99         public double filtered_pressure() {
 100                 if (flight_pres == MISSING)
 101                         return MISSING;
 102                 return barometer_to_pressure(flight_pres);
 103         }
 104
 105         public double ground_pressure() {
 106                 if (ground_pres == MISSING)
 107                         return MISSING;
 108                 return barometer_to_pressure(ground_pres);
 109         }
 110
 111         public double raw_altitude() {
 112                 double p = raw_pressure();
 113                 if (p == MISSING)
 114                         return MISSING;
 115                 return AltosConvert.pressure_to_altitude(p);
 116         }
 117
 118         public double ground_altitude() {
 119                 double p = ground_pressure();
 120                 if (p == MISSING)
 121                         return MISSING;
 122                 return AltosConvert.pressure_to_altitude(p);
 123         }
 124
 125         public double filtered_altitude() {
 126                 if (height != MISSING && ground_pres != MISSING)
 127                         return height + ground_altitude();
 128
 129                 double  p = filtered_pressure();
 130                 if (p == MISSING)
 131                         return MISSING;
 132                 return AltosConvert.pressure_to_altitude(p);
 133         }
 134
 135         public double filtered_height() {
 136                 if (height != MISSING)
 137                         return height;
 138
 139                 double f = filtered_altitude();
 140                 double g = ground_altitude();
 141                 if (f == MISSING || g == MISSING)
 142                         return MISSING;
 143                 return f - g;
 144         }
 145
 146         public double raw_height() {
 147                 double r = raw_altitude();
 148                 double g = ground_altitude();
 149
 150                 if (r == MISSING || g == MISSING)
 151                         return height;
 152                 return r - g;
 153         }
 154
 155         public double battery_voltage() {
 156                 if (batt == MISSING)
 157                         return MISSING;
 158                 return AltosConvert.cc_battery_to_voltage(batt);
 159         }
 160
 161         public double main_voltage() {
 162                 if (main == MISSING)
 163                         return MISSING;
 164                 return AltosConvert.cc_ignitor_to_voltage(main);
 165         }
 166
 167         public double drogue_voltage() {
 168                 if (drogue == MISSING)
 169                         return MISSING;
 170                 return AltosConvert.cc_ignitor_to_voltage(drogue);
 171         }
 172
 173         /* Value for the CC1111 built-in temperature sensor
 174          * Output voltage at 0°C = 0.755V
 175          * Coefficient = 0.00247V/°C
 176          * Reference voltage = 1.25V
 177          *
 178          * temp = ((value / 32767) * 1.25 - 0.755) / 0.00247
 179          *      = (value - 19791.268) / 32768 * 1.25 / 0.00247
 180          */
 181
 182         static double
 183         thermometer_to_temperature(double thermo)
 184         {
 185                 return (thermo - 19791.268) / 32728.0 * 1.25 / 0.00247;
 186         }
 187
 188         public double temperature() {
 189                 if (temp == MISSING)
 190                         return MISSING;
 191                 return thermometer_to_temperature(temp);
 192         }
 193
 194         double accel_counts_per_mss() {
 195                 double  counts_per_g = Math.abs(accel_minus_g - accel_plus_g) / 2;
 196
 197                 return counts_per_g / 9.80665;
 198         }
 199
 200         public double acceleration() {
 201                 if (acceleration != MISSING)
 202                         return acceleration;
 203
 204                 if (ground_accel == MISSING || accel == MISSING)
 205                         return MISSING;
 206                 return (ground_accel - accel) / accel_counts_per_mss();
 207         }
 208
 209         public double accel_speed() {
 210                 if (speed != MISSING)
 211                         return speed;
 212                 if (flight_vel == MISSING)
 213                         return MISSING;
 214                 return flight_vel / (accel_counts_per_mss() * 100.0);
 215         }
 216
 217         public String state() {
 218                 return Altos.state_name(state);
 219         }
 220
 221         public static String gets(FileInputStream s) throws IOException {
 222                 int c;
 223                 String  line = "";
 224
 225                 while ((c = s.read()) != -1) {
 226                         if (c == '\r')
 227                                 continue;
 228                         if (c == '\n') {
 229                                 return line;
 230                         }
 231                         line = line + (char) c;
 232                 }
 233                 return null;
 234         }
 235
 236         public AltosRecord(AltosRecord old) {
 237                 version = old.version;
 238                 seen = old.seen;
 239                 callsign = old.callsign;
 240                 serial = old.serial;
 241                 flight = old.flight;
 242                 rssi = old.rssi;
 243                 status = old.status;
 244                 state = old.state;
 245                 tick = old.tick;
 246                 accel = old.accel;
 247                 pres = old.pres;
 248                 temp = old.temp;
 249                 batt = old.batt;
 250                 drogue = old.drogue;
 251                 main = old.main;
 252                 flight_accel = old.flight_accel;
 253                 ground_accel = old.ground_accel;
 254                 flight_vel = old.flight_vel;
 255                 flight_pres = old.flight_pres;
 256                 ground_pres = old.ground_pres;
 257                 accel_plus_g = old.accel_plus_g;
 258                 accel_minus_g = old.accel_minus_g;
 259                 acceleration = old.acceleration;
 260                 speed = old.speed;
 261                 height = old.height;
 262                 gps = new AltosGPS(old.gps);
 263         }
 264
 265         public AltosRecord() {
 266                 version = 0;
 267                 seen = 0;
 268                 callsign = "N0CALL";
 269                 serial = 0;
 270                 flight = 0;
 271                 rssi = 0;
 272                 status = 0;
 273                 state = Altos.ao_flight_startup;
 274                 tick = 0;
 275                 accel = MISSING;
 276                 pres = MISSING;
 277                 temp = MISSING;
 278                 batt = MISSING;
 279                 drogue = MISSING;
 280                 main = MISSING;
 281                 flight_accel = 0;
 282                 ground_accel = 0;
 283                 flight_vel = 0;
 284                 flight_pres = 0;
 285                 ground_pres = 0;
 286                 accel_plus_g = 0;
 287                 accel_minus_g = 0;
 288                 acceleration = MISSING;
 289                 speed = MISSING;
 290                 height = MISSING;
 291                 gps = new AltosGPS();
 292         }
 293 }