2 * Copyright © 2010 Keith Packard <keithp@keithp.com>
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.
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.
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.
22 import java.util.HashMap;
25 public class AltosRecord {
26 final static int MISSING = 0x7fffffff;
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;
68 double time; /* seconds since boost */
71 * Values for our MP3H6115A pressure sensor
73 * From the data sheet:
75 * Pressure range: 15-115 kPa
76 * Voltage at 115kPa: 2.82
77 * Output scale: 27mV/kPa
80 * 27 mV/kPa * 2047 / 3300 counts/mV = 16.75 counts/kPa
81 * 2.82V * 2047 / 3.3 counts/V = 1749 counts/115 kPa
84 static final double counts_per_kPa = 27 * 2047 / 3300;
85 static final double counts_at_101_3kPa = 1674.0;
88 barometer_to_pressure(double count)
90 return ((count / 16.0) / 2047.0 + 0.095) / 0.009 * 1000.0;
93 public double raw_pressure() {
96 return barometer_to_pressure(pres);
99 public double filtered_pressure() {
100 if (flight_pres == MISSING)
102 return barometer_to_pressure(flight_pres);
105 public double ground_pressure() {
106 if (ground_pres == MISSING)
108 return barometer_to_pressure(ground_pres);
111 public double raw_altitude() {
112 double p = raw_pressure();
115 return AltosConvert.pressure_to_altitude(p);
118 public double ground_altitude() {
119 double p = ground_pressure();
122 return AltosConvert.pressure_to_altitude(p);
125 public double filtered_altitude() {
126 if (height != MISSING && ground_pres != MISSING)
127 return height + ground_altitude();
129 double p = filtered_pressure();
132 return AltosConvert.pressure_to_altitude(p);
135 public double filtered_height() {
136 if (height != MISSING)
139 double f = filtered_altitude();
140 double g = ground_altitude();
141 if (f == MISSING || g == MISSING)
146 public double raw_height() {
147 double r = raw_altitude();
148 double g = ground_altitude();
150 if (r == MISSING || g == MISSING)
155 public double battery_voltage() {
158 return AltosConvert.cc_battery_to_voltage(batt);
161 public double main_voltage() {
164 return AltosConvert.cc_ignitor_to_voltage(main);
167 public double drogue_voltage() {
168 if (drogue == MISSING)
170 return AltosConvert.cc_ignitor_to_voltage(drogue);
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
178 * temp = ((value / 32767) * 1.25 - 0.755) / 0.00247
179 * = (value - 19791.268) / 32768 * 1.25 / 0.00247
183 thermometer_to_temperature(double thermo)
185 return (thermo - 19791.268) / 32728.0 * 1.25 / 0.00247;
188 public double temperature() {
191 return thermometer_to_temperature(temp);
194 double accel_counts_per_mss() {
195 double counts_per_g = Math.abs(accel_minus_g - accel_plus_g) / 2;
197 return counts_per_g / 9.80665;
200 public double acceleration() {
201 if (acceleration != MISSING)
204 if (ground_accel == MISSING || accel == MISSING)
206 return (ground_accel - accel) / accel_counts_per_mss();
209 public double accel_speed() {
210 if (speed != MISSING)
212 if (flight_vel == MISSING)
214 return flight_vel / (accel_counts_per_mss() * 100.0);
217 public String state() {
218 return Altos.state_name(state);
221 public static String gets(FileInputStream s) throws IOException {
225 while ((c = s.read()) != -1) {
231 line = line + (char) c;
236 public AltosRecord(AltosRecord old) {
237 version = old.version;
239 callsign = old.callsign;
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;
262 gps = new AltosGPS(old.gps);
265 public AltosRecord() {
273 state = Altos.ao_flight_startup;
288 acceleration = MISSING;
291 gps = new AltosGPS();