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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 import altosui.AltosConvert;
  25 import altosui.AltosGPS;
  26
  27 public class AltosRecord {
  28         int     version;
  29         String  callsign;
  30         int     serial;
  31         int     flight;
  32         int     rssi;
  33         int     status;
  34         int     state;
  35         int     tick;
  36         int     accel;
  37         int     pres;
  38         int     temp;
  39         int     batt;
  40         int     drogue;
  41         int     main;
  42         int     flight_accel;
  43         int     ground_accel;
  44         int     flight_vel;
  45         int     flight_pres;
  46         int     ground_pres;
  47         int     accel_plus_g;
  48         int     accel_minus_g;
  49         AltosGPS        gps;
  50
  51         double  time;   /* seconds since boost */
  52
  53         /*
  54          * Values for our MP3H6115A pressure sensor
  55          *
  56          * From the data sheet:
  57          *
  58          * Pressure range: 15-115 kPa
  59          * Voltage at 115kPa: 2.82
  60          * Output scale: 27mV/kPa
  61          *
  62          *
  63          * 27 mV/kPa * 2047 / 3300 counts/mV = 16.75 counts/kPa
  64          * 2.82V * 2047 / 3.3 counts/V = 1749 counts/115 kPa
  65          */
  66
  67         static final double counts_per_kPa = 27 * 2047 / 3300;
  68         static final double counts_at_101_3kPa = 1674.0;
  69
  70         static double
  71         barometer_to_pressure(double count)
  72         {
  73                 return ((count / 16.0) / 2047.0 + 0.095) / 0.009 * 1000.0;
  74         }
  75
  76         public double pressure() {
  77                 return barometer_to_pressure(flight_pres);
  78         }
  79
  80         public double ground_pressure() {
  81                 return barometer_to_pressure(ground_pres);
  82         }
  83
  84         public double altitude() {
  85                 return AltosConvert.pressure_to_altitude(pressure());
  86         }
  87
  88         public double ground_altitude() {
  89                 return AltosConvert.pressure_to_altitude(ground_pressure());
  90         }
  91
  92         public double height() {
  93                 return altitude() - ground_altitude();
  94         }
  95
  96         public double battery_voltage() {
  97                 return AltosConvert.cc_battery_to_voltage(batt);
  98         }
  99
 100         public double main_voltage() {
 101                 return AltosConvert.cc_ignitor_to_voltage(main);
 102         }
 103
 104         public double drogue_voltage() {
 105                 return AltosConvert.cc_ignitor_to_voltage(drogue);
 106         }
 107
 108         /* Value for the CC1111 built-in temperature sensor
 109          * Output voltage at 0°C = 0.755V
 110          * Coefficient = 0.00247V/°C
 111          * Reference voltage = 1.25V
 112          *
 113          * temp = ((value / 32767) * 1.25 - 0.755) / 0.00247
 114          *      = (value - 19791.268) / 32768 * 1.25 / 0.00247
 115          */
 116
 117         static double
 118         thermometer_to_temperature(double thermo)
 119         {
 120                 return (thermo - 19791.268) / 32728.0 * 1.25 / 0.00247;
 121         }
 122
 123         public double temperature() {
 124                 return thermometer_to_temperature(temp);
 125         }
 126
 127         double accel_counts_per_mss() {
 128                 double  counts_per_g = Math.abs(accel_minus_g - accel_plus_g) / 2;
 129
 130                 return counts_per_g / 9.80665;
 131         }
 132         public double acceleration() {
 133                 return (accel_plus_g - accel) / accel_counts_per_mss();
 134         }
 135
 136         public double accel_speed() {
 137                 double speed = flight_vel / (accel_counts_per_mss() * 100.0);
 138                 return speed;
 139         }
 140
 141         public String state() {
 142                 return Altos.state_name(state);
 143         }
 144
 145         public static String gets(FileInputStream s) throws IOException {
 146                 int c;
 147                 String  line = "";
 148
 149                 while ((c = s.read()) != -1) {
 150                         if (c == '\r')
 151                                 continue;
 152                         if (c == '\n') {
 153                                 return line;
 154                         }
 155                         line = line + (char) c;
 156                 }
 157                 return null;
 158         }
 159
 160         public AltosRecord(AltosRecord old) {
 161                 version = old.version;
 162                 callsign = old.callsign;
 163                 serial = old.serial;
 164                 flight = old.flight;
 165                 rssi = old.rssi;
 166                 status = old.status;
 167                 state = old.state;
 168                 tick = old.tick;
 169                 accel = old.accel;
 170                 pres = old.pres;
 171                 temp = old.temp;
 172                 batt = old.batt;
 173                 drogue = old.drogue;
 174                 main = old.main;
 175                 flight_accel = old.flight_accel;
 176                 ground_accel = old.ground_accel;
 177                 flight_vel = old.flight_vel;
 178                 flight_pres = old.flight_pres;
 179                 ground_pres = old.ground_pres;
 180                 accel_plus_g = old.accel_plus_g;
 181                 accel_minus_g = old.accel_minus_g;
 182                 gps = new AltosGPS(old.gps);
 183         }
 184
 185         public AltosRecord() {
 186                 version = 0;
 187                 callsign = "N0CALL";
 188                 serial = 0;
 189                 flight = 0;
 190                 rssi = 0;
 191                 status = 0;
 192                 state = Altos.ao_flight_startup;
 193                 tick = 0;
 194                 accel = 0;
 195                 pres = 0;
 196                 temp = 0;
 197                 batt = 0;
 198                 drogue = 0;
 199                 main = 0;
 200                 flight_accel = 0;
 201                 ground_accel = 0;
 202                 flight_vel = 0;
 203                 flight_pres = 0;
 204                 ground_pres = 0;
 205                 accel_plus_g = 0;
 206                 accel_minus_g = 0;
 207                 gps = new AltosGPS();
 208         }
 209 }