altoslib: Improve AltosState save/restore debugging
[fw/altos] / altoslib / AltosState.java
index ef3a09766adc68e69c60e09b725f2358aa56ffbc..93586e8c4465223f65143f94a1f4330842a267e9 100644 (file)
  * Track flight state from telemetry or eeprom data stream
  */
 
-package org.altusmetrum.altoslib_4;
+package org.altusmetrum.altoslib_11;
 
-public class AltosState implements Cloneable {
+import java.io.*;
+
+public class AltosState implements Cloneable, AltosJsonable {
 
        public static final int set_position = 1;
        public static final int set_gps = 2;
@@ -29,8 +31,9 @@ public class AltosState implements Cloneable {
 
        public int set;
 
+       static final double filter_len = 2.0;
        static final double ascent_filter_len = 0.5;
-       static final double descent_filter_len = 0.5;
+       static final double descent_filter_len = 5.0;
 
        /* derived data */
 
@@ -43,9 +46,9 @@ public class AltosState implements Cloneable {
        private int     prev_tick;
        public int      boost_tick;
 
-       class AltosValue {
-               private double  value;
-               private double  prev_value;
+       class AltosValue implements AltosJsonable {
+               double  value;
+               double  prev_value;
                private double  max_value;
                private double  set_time;
                private double  prev_set_time;
@@ -62,8 +65,10 @@ public class AltosState implements Cloneable {
                }
 
                void set_filtered(double new_value, double time) {
-                       if (prev_value != AltosLib.MISSING)
-                               new_value = (prev_value * 15.0 + new_value) / 16.0;
+                       if (prev_value != AltosLib.MISSING) {
+                               double f = 1/Math.exp((time - prev_set_time) / filter_len);
+                               new_value = f * new_value + (1-f) * prev_value;
+                       }
                        set(new_value, time);
                }
 
@@ -172,16 +177,64 @@ public class AltosState implements Cloneable {
                        prev_set_time = set_time;
                }
 
+               public AltosJson json() {
+                       AltosJson j = new AltosJson();
+
+                       j.put("value", value);
+                       j.put("prev_value", prev_value);
+                       j.put("max_value", max_value);
+                       j.put("set_time", set_time);
+                       j.put("prev_set_time", prev_set_time);
+                       return j;
+               }
+
+               AltosValue(AltosJson j) {
+                       this();
+                       if (j != null) {
+                               value = j.get_double("value", value);
+                               prev_value = j.get_double("prev_value", prev_value);
+                               max_value = j.get_double("max_value", max_value);
+                               set_time = j.get_double("set_time", 0);
+                               prev_set_time = j.get_double("prev_set_time", 0);
+                       }
+               }
+
                AltosValue() {
                        value = AltosLib.MISSING;
                        prev_value = AltosLib.MISSING;
                        max_value = AltosLib.MISSING;
                }
+
+       }
+
+       AltosValue AltosValue_fromJson(AltosJson j, AltosValue def) {
+               if (j == null)
+                       return def;
+               return new AltosValue(j);
        }
 
-       class AltosCValue {
-               AltosValue      measured;
-               AltosValue      computed;
+       class AltosCValue implements AltosJsonable {
+
+               class AltosIValue extends AltosValue implements AltosJsonable {
+                       boolean can_max() {
+                               return c_can_max();
+                       }
+
+                       AltosIValue() {
+                               super();
+                       }
+
+                       AltosIValue(AltosJson j) {
+                               super(j);
+                       }
+               };
+
+               public AltosIValue      measured;
+               public AltosIValue      computed;
+
+               boolean can_max() { return true; }
+
+               boolean c_can_max() { return can_max(); }
 
                double value() {
                        double v = measured.value();
@@ -262,15 +315,35 @@ public class AltosState implements Cloneable {
                        computed.finish_update();
                }
 
-               AltosCValue() {
-                       measured = new AltosValue();
-                       computed = new AltosValue();
+               public AltosCValue() {
+                       measured = new AltosIValue();
+                       computed = new AltosIValue();
                }
+
+               public AltosJson json() {
+                       AltosJson       j = new AltosJson();
+
+                       j.put("measured", measured.json());
+                       j.put("computed", computed.json());
+                       return j;
+               }
+
+               AltosCValue(AltosJson j) {
+                       measured = new AltosIValue(j.get("measured"));
+                       computed = new AltosIValue(j.get("computed"));
+               }
+       }
+
+       AltosCValue AltosCValue_fromJson(AltosJson j, AltosCValue def) {
+               if (j == null)
+                       return def;
+               return new AltosCValue(j);
        }
 
-       public int      state;
+       private int     state;
        public int      flight;
        public int      serial;
+       public int      altitude_32;
        public int      receiver_serial;
        public boolean  landed;
        public boolean  ascent; /* going up? */
@@ -312,6 +385,19 @@ public class AltosState implements Cloneable {
                        pad_alt = value();
                        gps_altitude.set_gps_height();
                }
+
+               AltosGpsGroundAltitude() {
+                       super();
+               }
+
+               AltosGpsGroundAltitude (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosGpsGroundAltitude AltosGpsGroundAltitude_fromJson(AltosJson j, AltosGpsGroundAltitude def) {
+               if (j == null) return def;
+               return new AltosGpsGroundAltitude(j);
        }
 
        private AltosGpsGroundAltitude gps_ground_altitude;
@@ -335,6 +421,19 @@ public class AltosState implements Cloneable {
                        super.set_measured(p, time);
                        ground_altitude.set_computed(pressure_to_altitude(p), time);
                }
+
+               AltosGroundPressure () {
+                       super();
+               }
+
+               AltosGroundPressure (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosGroundPressure AltosGroundPressure_fromJson(AltosJson j, AltosGroundPressure def) {
+               if (j == null) return def;
+               return new AltosGroundPressure(j);
        }
 
        private AltosGroundPressure ground_pressure;
@@ -365,6 +464,19 @@ public class AltosState implements Cloneable {
                        set_speed(measured);
                        set |= set_position;
                }
+
+               AltosAltitude() {
+                       super();
+               }
+
+               AltosAltitude (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosAltitude AltosAltitude_fromJson(AltosJson j, AltosAltitude def) {
+               if (j == null) return def;
+               return new AltosAltitude(j);
        }
 
        private AltosAltitude   altitude;
@@ -385,6 +497,19 @@ public class AltosState implements Cloneable {
                        super.set(a, t);
                        set_gps_height();
                }
+
+               AltosGpsAltitude() {
+                       super();
+               }
+
+               AltosGpsAltitude (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosGpsAltitude AltosGpsAltitude_fromJson(AltosJson j, AltosGpsAltitude def) {
+               if (j == null) return def;
+               return new AltosGpsAltitude(j);
        }
 
        private AltosGpsAltitude        gps_altitude;
@@ -392,6 +517,7 @@ public class AltosState implements Cloneable {
        private AltosValue              gps_ground_speed;
        private AltosValue              gps_ascent_rate;
        private AltosValue              gps_course;
+       private AltosValue              gps_speed;
 
        public double altitude() {
                double a = altitude.value();
@@ -427,14 +553,30 @@ public class AltosState implements Cloneable {
                return gps_ground_speed.value();
        }
 
+       public double max_gps_ground_speed() {
+               return gps_ground_speed.max();
+       }
+
        public double gps_ascent_rate() {
                return gps_ascent_rate.value();
        }
 
+       public double max_gps_ascent_rate() {
+               return gps_ascent_rate.max();
+       }
+
        public double gps_course() {
                return gps_course.value();
        }
 
+       public double gps_speed() {
+               return gps_speed.value();
+       }
+
+       public double max_gps_speed() {
+               return gps_speed.max();
+       }
+
        class AltosPressure extends AltosValue {
                void set(double p, double time) {
                        super.set(p, time);
@@ -443,6 +585,19 @@ public class AltosState implements Cloneable {
                        double a = pressure_to_altitude(p);
                        altitude.set_computed(a, time);
                }
+
+               AltosPressure() {
+                       super();
+               }
+
+               AltosPressure (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosPressure AltosPressure_fromJson(AltosJson j, AltosPressure def) {
+               if (j == null) return def;
+               return new AltosPressure(j);
        }
 
        private AltosPressure   pressure;
@@ -455,11 +610,7 @@ public class AltosState implements Cloneable {
                pressure.set(p, time);
        }
 
-       public double height() {
-               double k = kalman_height.value();
-               if (k != AltosLib.MISSING)
-                       return k;
-
+       public double baro_height() {
                double a = altitude();
                double g = ground_altitude();
                if (a != AltosLib.MISSING && g != AltosLib.MISSING)
@@ -467,6 +618,18 @@ public class AltosState implements Cloneable {
                return AltosLib.MISSING;
        }
 
+       public double height() {
+               double k = kalman_height.value();
+               if (k != AltosLib.MISSING)
+                       return k;
+
+               double b = baro_height();
+               if (b != AltosLib.MISSING)
+                       return b;
+
+               return gps_height();
+       }
+
        public double max_height() {
                double  k = kalman_height.max();
                if (k != AltosLib.MISSING)
@@ -476,7 +639,7 @@ public class AltosState implements Cloneable {
                double g = ground_altitude();
                if (a != AltosLib.MISSING && g != AltosLib.MISSING)
                        return a - g;
-               return AltosLib.MISSING;
+               return max_gps_height();
        }
 
        public double gps_height() {
@@ -500,7 +663,7 @@ public class AltosState implements Cloneable {
        class AltosSpeed extends AltosCValue {
 
                boolean can_max() {
-                       return state < AltosLib.ao_flight_fast;
+                       return state < AltosLib.ao_flight_fast || state == AltosLib.ao_flight_stateless;
                }
 
                void set_accel() {
@@ -521,6 +684,19 @@ public class AltosState implements Cloneable {
                        super.set_measured(new_value, time);
                        set_accel();
                }
+
+               AltosSpeed() {
+                       super();
+               }
+
+               AltosSpeed (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosSpeed AltosSpeed_fromJson(AltosJson j, AltosSpeed def) {
+               if (j == null) return def;
+               return new AltosSpeed(j);
        }
 
        private AltosSpeed speed;
@@ -529,20 +705,32 @@ public class AltosState implements Cloneable {
                double v = kalman_speed.value();
                if (v != AltosLib.MISSING)
                        return v;
-               return speed.value();
+               v = speed.value();
+               if (v != AltosLib.MISSING)
+                       return v;
+               v = gps_speed();
+               if (v != AltosLib.MISSING)
+                       return v;
+               return AltosLib.MISSING;
        }
 
        public double max_speed() {
                double v = kalman_speed.max();
                if (v != AltosLib.MISSING)
                        return v;
-               return speed.max();
+               v = speed.max();
+               if (v != AltosLib.MISSING)
+                       return v;
+               v = max_gps_speed();
+               if (v != AltosLib.MISSING)
+                       return v;
+               return AltosLib.MISSING;
        }
 
        class AltosAccel extends AltosCValue {
 
                boolean can_max() {
-                       return state < AltosLib.ao_flight_fast;
+                       return state < AltosLib.ao_flight_fast || state == AltosLib.ao_flight_stateless;
                }
 
                void set_measured(double a, double time) {
@@ -550,6 +738,19 @@ public class AltosState implements Cloneable {
                        if (ascent)
                                speed.set_integral(this.measured);
                }
+
+               AltosAccel() {
+                       super();
+               }
+
+               AltosAccel (AltosJson j) {
+                       super(j);
+               }
+       }
+
+       AltosAccel AltosAccel_fromJson(AltosJson j, AltosAccel def) {
+               if (j == null) return def;
+               return new AltosAccel(j);
        }
 
        AltosAccel acceleration;
@@ -562,10 +763,10 @@ public class AltosState implements Cloneable {
                return acceleration.max();
        }
 
-       public AltosValue       orient;
+       public AltosCValue      orient;
 
        public void set_orient(double new_orient) {
-               orient.set(new_orient, time);
+               orient.set_measured(new_orient, time);
        }
 
        public double orient() {
@@ -630,6 +831,7 @@ public class AltosState implements Cloneable {
        public double   ground_accel_avg;
 
        public int      log_format;
+       public int      log_space;
        public String   product;
 
        public AltosMs5607      baro;
@@ -675,7 +877,7 @@ public class AltosState implements Cloneable {
                pressure = new AltosPressure();
                speed = new AltosSpeed();
                acceleration = new AltosAccel();
-               orient = new AltosValue();
+               orient = new AltosCValue();
 
                temperature = AltosLib.MISSING;
                battery_voltage = AltosLib.MISSING;
@@ -695,7 +897,24 @@ public class AltosState implements Cloneable {
                gps_pending = false;
 
                imu = null;
+               last_imu_time = AltosLib.MISSING;
+               rotation = null;
+               ground_rotation = null;
+
                mag = null;
+               accel_zero_along = AltosLib.MISSING;
+               accel_zero_across = AltosLib.MISSING;
+               accel_zero_through = AltosLib.MISSING;
+
+               accel_ground_along = AltosLib.MISSING;
+               accel_ground_across = AltosLib.MISSING;
+               accel_ground_through = AltosLib.MISSING;
+
+               pad_orientation = AltosLib.MISSING;
+
+               gyro_zero_roll = AltosLib.MISSING;
+               gyro_zero_pitch = AltosLib.MISSING;
+               gyro_zero_yaw = AltosLib.MISSING;
 
                set_npad(0);
                ngps = 0;
@@ -712,6 +931,7 @@ public class AltosState implements Cloneable {
                gps_altitude = new AltosGpsAltitude();
                gps_ground_altitude = new AltosGpsGroundAltitude();
                gps_ground_speed = new AltosValue();
+               gps_speed = new AltosValue();
                gps_ascent_rate = new AltosValue();
                gps_course = new AltosValue();
 
@@ -719,6 +939,7 @@ public class AltosState implements Cloneable {
                speak_altitude = AltosLib.MISSING;
 
                callsign = null;
+               firmware_version = null;
 
                accel_plus_g = AltosLib.MISSING;
                accel_minus_g = AltosLib.MISSING;
@@ -728,9 +949,11 @@ public class AltosState implements Cloneable {
                ground_accel_avg = AltosLib.MISSING;
 
                log_format = AltosLib.MISSING;
+               log_space = AltosLib.MISSING;
                product = null;
                serial = AltosLib.MISSING;
                receiver_serial = AltosLib.MISSING;
+               altitude_32 = AltosLib.MISSING;
 
                baro = null;
                companion = null;
@@ -820,6 +1043,27 @@ public class AltosState implements Cloneable {
                        imu = old.imu.clone();
                else
                        imu = null;
+               last_imu_time = old.last_imu_time;
+
+               if (old.rotation != null)
+                       rotation = new AltosRotation (old.rotation);
+
+               if (old.ground_rotation != null) {
+                       ground_rotation = new AltosRotation(old.ground_rotation);
+               }
+
+               accel_zero_along = old.accel_zero_along;
+               accel_zero_across = old.accel_zero_across;
+               accel_zero_through = old.accel_zero_through;
+
+               accel_ground_along = old.accel_ground_along;
+               accel_ground_across = old.accel_ground_across;
+               accel_ground_through = old.accel_ground_through;
+               pad_orientation = old.pad_orientation;
+
+               gyro_zero_roll = old.gyro_zero_roll;
+               gyro_zero_pitch = old.gyro_zero_pitch;
+               gyro_zero_yaw = old.gyro_zero_yaw;
 
                if (old.mag != null)
                        mag = old.mag.clone();
@@ -846,6 +1090,7 @@ public class AltosState implements Cloneable {
                gps_ground_speed.copy(old.gps_ground_speed);
                gps_ascent_rate.copy(old.gps_ascent_rate);
                gps_course.copy(old.gps_course);
+               gps_speed.copy(old.gps_speed);
 
                pad_lat = old.pad_lat;
                pad_lon = old.pad_lon;
@@ -855,6 +1100,7 @@ public class AltosState implements Cloneable {
                speak_altitude = old.speak_altitude;
 
                callsign = old.callsign;
+               firmware_version = old.firmware_version;
 
                accel_plus_g = old.accel_plus_g;
                accel_minus_g = old.accel_minus_g;
@@ -863,9 +1109,11 @@ public class AltosState implements Cloneable {
                ground_accel_avg = old.ground_accel_avg;
 
                log_format = old.log_format;
+               log_space = old.log_space;
                product = old.product;
                serial = old.serial;
                receiver_serial = old.receiver_serial;
+               altitude_32 = old.altitude_32;
 
                baro = old.baro;
                companion = old.companion;
@@ -877,17 +1125,17 @@ public class AltosState implements Cloneable {
        }
 
        void update_gps() {
-               elevation = 0;
-               range = -1;
+               elevation = AltosLib.MISSING;
+               range = AltosLib.MISSING;
 
                if (gps == null)
                        return;
 
                if (gps.locked && gps.nsat >= 4) {
                        /* Track consecutive 'good' gps reports, waiting for 10 of them */
-                       if (state == AltosLib.ao_flight_pad) {
+                       if (state == AltosLib.ao_flight_pad || state == AltosLib.ao_flight_stateless) {
                                set_npad(npad+1);
-                               if (pad_lat != AltosLib.MISSING) {
+                               if (pad_lat != AltosLib.MISSING && (npad < 10 || state == AltosLib.ao_flight_pad)) {
                                        pad_lat = (pad_lat * 31 + gps.lat) / 32;
                                        pad_lon = (pad_lon * 31 + gps.lon) / 32;
                                        gps_ground_altitude.set_filtered(gps.alt, time);
@@ -903,6 +1151,9 @@ public class AltosState implements Cloneable {
                                gps_ascent_rate.set(gps.climb_rate, time);
                        if (gps.ground_speed != AltosLib.MISSING)
                                gps_ground_speed.set(gps.ground_speed, time);
+                       if (gps.climb_rate != AltosLib.MISSING && gps.ground_speed != AltosLib.MISSING)
+                               gps_speed.set(Math.sqrt(gps.ground_speed * gps.ground_speed +
+                                                       gps.climb_rate * gps.climb_rate), time);
                        if (gps.course != AltosLib.MISSING)
                                gps_course.set(gps.course, time);
                }
@@ -918,9 +1169,6 @@ public class AltosState implements Cloneable {
                        elevation = from_pad.elevation;
                        range = from_pad.range;
                }
-
-               if ((gps.state & AltosGPS.AO_GPS_STATE_VALID) != 0)
-                       set_state (gps.state & ~(AltosGPS.AO_GPS_STATE_VALID));
        }
 
        public void set_tick(int new_tick) {
@@ -945,6 +1193,10 @@ public class AltosState implements Cloneable {
                return AltosLib.state_name(state);
        }
 
+       public void set_product(String product) {
+               this.product = product;
+       }
+
        public void set_state(int state) {
                if (state != AltosLib.ao_flight_invalid) {
                        this.state = state;
@@ -952,18 +1204,42 @@ public class AltosState implements Cloneable {
                                  state <= AltosLib.ao_flight_coast);
                        boost = (AltosLib.ao_flight_boost == state);
                }
+       }
 
+       public int state() {
+               return state;
        }
 
        public void set_device_type(int device_type) {
                this.device_type = device_type;
+               switch (device_type) {
+               case AltosLib.product_telegps:
+                       this.state = AltosLib.ao_flight_stateless;
+                       break;
+               }
        }
 
-       public void set_config(int major, int minor, int apogee_delay, int main_deploy, int flight_log_max) {
-               config_major = major;
-               config_minor = minor;
+       public void set_log_format(int log_format) {
+               this.log_format = log_format;
+               switch (log_format) {
+               case AltosLib.AO_LOG_FORMAT_TELEGPS:
+                       this.state = AltosLib.ao_flight_stateless;
+                       break;
+               }
+       }
+
+       public void set_log_space(int log_space) {
+               this.log_space = log_space;
+       }
+
+       public void set_flight_params(int apogee_delay, int main_deploy) {
                this.apogee_delay = apogee_delay;
                this.main_deploy = main_deploy;
+       }
+
+       public void set_config(int major, int minor, int flight_log_max) {
+               config_major = major;
+               config_minor = minor;
                this.flight_log_max = flight_log_max;
        }
 
@@ -975,15 +1251,27 @@ public class AltosState implements Cloneable {
                firmware_version = version;
        }
 
+       public int compare_version(String other_version) {
+               if (firmware_version == null)
+                       return AltosLib.MISSING;
+               return AltosLib.compare_version(firmware_version, other_version);
+       }
+
+       private void re_init() {
+               int bt = boost_tick;
+               int rs = receiver_serial;
+               init();
+               boost_tick = bt;
+               receiver_serial = rs;
+       }
+
        public void set_flight(int flight) {
 
                /* When the flight changes, reset the state */
-               if (flight != AltosLib.MISSING && flight != 0) {
+               if (flight != AltosLib.MISSING) {
                        if (this.flight != AltosLib.MISSING &&
                            this.flight != flight) {
-                               int bt = boost_tick;
-                               init();
-                               boost_tick = bt;
+                               re_init();
                        }
                        this.flight = flight;
                }
@@ -994,9 +1282,7 @@ public class AltosState implements Cloneable {
                if (serial != AltosLib.MISSING) {
                        if (this.serial != AltosLib.MISSING &&
                            this.serial != serial) {
-                               int bt = boost_tick;
-                               init();
-                               boost_tick = bt;
+                               re_init();
                        }
                        this.serial = serial;
                }
@@ -1007,6 +1293,15 @@ public class AltosState implements Cloneable {
                        receiver_serial = serial;
        }
 
+       public boolean altitude_32() {
+               return altitude_32 == 1;
+       }
+
+       public void set_altitude_32(int altitude_32) {
+               if (altitude_32 != AltosLib.MISSING)
+                       this.altitude_32 = altitude_32;
+       }
+
        public int rssi() {
                if (rssi == AltosLib.MISSING)
                        return 0;
@@ -1033,16 +1328,170 @@ public class AltosState implements Cloneable {
                }
        }
 
+
+       public double   accel_zero_along;
+       public double   accel_zero_across;
+       public double   accel_zero_through;
+
+       public AltosRotation    rotation;
+       public AltosRotation    ground_rotation;
+
+       public void set_accel_zero(double zero_along, double zero_across, double zero_through) {
+               if (zero_along != AltosLib.MISSING) {
+                       accel_zero_along = zero_along;
+                       accel_zero_across = zero_across;
+                       accel_zero_through = zero_through;
+               }
+       }
+
+       public int pad_orientation;
+
+       public double   accel_ground_along, accel_ground_across, accel_ground_through;
+
+       void update_pad_rotation() {
+               if (pad_orientation != AltosLib.MISSING && accel_ground_along != AltosLib.MISSING) {
+                       rotation = new AltosRotation(AltosIMU.convert_accel(accel_ground_across - accel_zero_across),
+                                                    AltosIMU.convert_accel(accel_ground_through - accel_zero_through),
+                                                    AltosIMU.convert_accel(accel_ground_along - accel_zero_along),
+                                                    pad_orientation);
+                       ground_rotation = rotation;
+                       orient.set_computed(rotation.tilt(), time);
+               }
+       }
+
+       public void set_accel_ground(double ground_along, double ground_across, double ground_through) {
+               accel_ground_along = ground_along;
+               accel_ground_across = ground_across;
+               accel_ground_through = ground_through;
+               update_pad_rotation();
+       }
+
+       public void set_pad_orientation(int pad_orientation) {
+               this.pad_orientation = pad_orientation;
+               update_pad_rotation();
+       }
+
+       public double   gyro_zero_roll;
+       public double   gyro_zero_pitch;
+       public double   gyro_zero_yaw;
+
+       public void set_gyro_zero(double roll, double pitch, double yaw) {
+               if (roll != AltosLib.MISSING) {
+                       gyro_zero_roll = roll;
+                       gyro_zero_pitch = pitch;
+                       gyro_zero_yaw = yaw;
+               }
+       }
+
+       public double   last_imu_time;
+
+       private double radians(double degrees) {
+               if (degrees == AltosLib.MISSING)
+                       return AltosLib.MISSING;
+               return degrees * Math.PI / 180.0;
+       }
+
+       private void update_orient() {
+               if (last_imu_time != AltosLib.MISSING) {
+                       double  t = time - last_imu_time;
+
+                       double  pitch = radians(gyro_pitch());
+                       double  yaw = radians(gyro_yaw());
+                       double  roll = radians(gyro_roll());
+
+                       if (t > 0 & pitch != AltosLib.MISSING && rotation != null) {
+                               rotation.rotate(t, pitch, yaw, roll);
+                               orient.set_computed(rotation.tilt(), time);
+                       }
+               }
+               last_imu_time = time;
+       }
+
        public void set_imu(AltosIMU imu) {
                if (imu != null)
                        imu = imu.clone();
                this.imu = imu;
+               update_orient();
+       }
+
+       private double gyro_zero_overflow(double first) {
+               double v = first / 128.0;
+               if (v < 0)
+                       v = Math.ceil(v);
+               else
+                       v = Math.floor(v);
+               return v * 128.0;
+       }
+
+       public void check_imu_wrap(AltosIMU imu) {
+               if (this.imu == null) {
+                       gyro_zero_roll += gyro_zero_overflow(imu.gyro_roll);
+                       gyro_zero_pitch += gyro_zero_overflow(imu.gyro_pitch);
+                       gyro_zero_yaw += gyro_zero_overflow(imu.gyro_yaw);
+               }
+       }
+
+       public double accel_along() {
+               if (imu != null && accel_zero_along != AltosLib.MISSING)
+                       return AltosIMU.convert_accel(imu.accel_along - accel_zero_along);
+               return AltosLib.MISSING;
+       }
+
+       public double accel_across() {
+               if (imu != null && accel_zero_across != AltosLib.MISSING)
+                       return AltosIMU.convert_accel(imu.accel_across - accel_zero_across);
+               return AltosLib.MISSING;
+       }
+
+       public double accel_through() {
+               if (imu != null && accel_zero_through != AltosLib.MISSING)
+                       return AltosIMU.convert_accel(imu.accel_through - accel_zero_through);
+               return AltosLib.MISSING;
+       }
+
+       public double gyro_roll() {
+               if (imu != null && gyro_zero_roll != AltosLib.MISSING) {
+                       return AltosIMU.convert_gyro(imu.gyro_roll - gyro_zero_roll);
+               }
+               return AltosLib.MISSING;
+       }
+
+       public double gyro_pitch() {
+               if (imu != null && gyro_zero_pitch != AltosLib.MISSING) {
+                       return AltosIMU.convert_gyro(imu.gyro_pitch - gyro_zero_pitch);
+               }
+               return AltosLib.MISSING;
+       }
+
+       public double gyro_yaw() {
+               if (imu != null && gyro_zero_yaw != AltosLib.MISSING) {
+                       return AltosIMU.convert_gyro(imu.gyro_yaw - gyro_zero_yaw);
+               }
+               return AltosLib.MISSING;
        }
 
        public void set_mag(AltosMag mag) {
                this.mag = mag.clone();
        }
 
+       public double mag_along() {
+               if (mag != null)
+                       return AltosMag.convert_gauss(mag.along);
+               return AltosLib.MISSING;
+       }
+
+       public double mag_across() {
+               if (mag != null)
+                       return AltosMag.convert_gauss(mag.across);
+               return AltosLib.MISSING;
+       }
+
+       public double mag_through() {
+               if (mag != null)
+                       return AltosMag.convert_gauss(mag.through);
+               return AltosLib.MISSING;
+       }
+
        public AltosMs5607 make_baro() {
                if (baro == null)
                        baro = new AltosMs5607();
@@ -1067,11 +1516,6 @@ public class AltosState implements Cloneable {
                }
        }
 
-       public void make_companion (int nchannels) {
-               if (companion == null)
-                       companion = new AltosCompanion(nchannels);
-       }
-
        public void set_companion(AltosCompanion companion) {
                this.companion = companion;
        }
@@ -1193,10 +1637,253 @@ public class AltosState implements Cloneable {
        public AltosState clone() {
                AltosState s = new AltosState();
                s.copy(this);
+
+               /* Code to test state save/restore. Enable only for that purpose
+                */
+               if (false) {
+                       AltosJson       json = new AltosJson(this);
+                       String          onetrip = json.toPrettyString();
+                       AltosJson       back = AltosJson.fromString(onetrip);
+                       AltosState      tripstate = (AltosState) back.make(this.getClass());
+                       AltosJson       tripjson = new AltosJson(tripstate);
+                       String          twotrip = tripjson.toPrettyString();
+
+                       if (!onetrip.equals(twotrip)) {
+                               try {
+                                       FileWriter one_file = new FileWriter("one.json", true);
+                                       one_file.write(onetrip);
+                                       one_file.flush();
+                                       FileWriter two_file = new FileWriter("two.json", true);
+                                       two_file.write(twotrip);
+                                       two_file.flush();
+                               } catch (Exception e) {
+                               }
+                               System.out.printf("json error\n");
+                               System.exit(1);
+                       }
+               }
                return s;
        }
 
        public AltosState () {
                init();
        }
+
+       public AltosJson json() {
+               AltosJson       j = new AltosJson();
+
+               j.put("valid", true);
+               j.put("set", set);
+               j.put("received_time", received_time);
+               j.put("time", time);
+               j.put("prev_time", prev_time);
+               j.put("time_change", time_change);
+               j.put("tick", tick);
+               j.put("prev_tick", prev_tick);
+               j.put("boost_tick", boost_tick);
+               j.put("state", state);
+               j.put("flight", flight);
+               j.put("serial", serial);
+               j.put("altitude_32", altitude_32);
+               j.put("receiver_serial", receiver_serial);
+               j.put("landed", landed);
+               j.put("ascent", ascent);
+               j.put("boost", boost);
+               j.put("rssi", rssi);
+               j.put("status", status);
+               j.put("device_type", device_type);
+               j.put("config_major", config_major);
+               j.put("config_minor", config_minor);
+               j.put("apogee_delay", apogee_delay);
+               j.put("main_deploy", main_deploy);
+               j.put("flight_log_max", flight_log_max);
+               j.put("ground_altitude", ground_altitude);
+               j.put("gps_ground_altitude", gps_ground_altitude);
+               j.put("ground_pressure", ground_pressure);
+               j.put("altitude", altitude);
+               j.put("gps_altitude", gps_altitude);
+               j.put("gps_ground_speed", gps_ground_speed);
+               j.put("gps_ascent_rate", gps_ascent_rate);
+               j.put("gps_course", gps_course);
+               j.put("gps_speed", gps_speed);
+               j.put("pressure", pressure);
+               j.put("speed", speed);
+               j.put("acceleration", acceleration);
+               j.put("orient", orient);
+               j.put("kalman_height", kalman_height);
+               j.put("kalman_speed", kalman_speed);
+               j.put("kalman_acceleration", kalman_acceleration);
+
+               j.put("battery_voltage",battery_voltage);
+               j.put("pyro_voltage",pyro_voltage);
+               j.put("temperature",temperature);
+               j.put("apogee_voltage",apogee_voltage);
+               j.put("main_voltage",main_voltage);
+               j.put("ignitor_voltage",ignitor_voltage);
+               j.put("gps", gps);
+               j.put("temp_gps", temp_gps);
+               j.put("temp_gps_sat_tick", temp_gps_sat_tick);
+               j.put("gps_pending", gps_pending);
+               j.put("gps_sequence", gps_sequence);
+               j.put("imu", imu);
+               j.put("mag", mag);
+
+               j.put("npad", npad);
+               j.put("gps_waiting", gps_waiting);
+               j.put("gps_ready", gps_ready);
+               j.put("ngps", ngps);
+               j.put("from_pad", from_pad);
+               j.put("elevation", elevation);
+               j.put("range", range);
+               j.put("gps_height", gps_height);
+               j.put("pad_lat", pad_lat);
+               j.put("pad_lon", pad_lon);
+               j.put("pad_alt", pad_alt);
+               j.put("speak_tick", speak_tick);
+               j.put("speak_altitude", speak_altitude);
+               j.put("callsign", callsign);
+               j.put("firmware_version", firmware_version);
+               j.put("accel_plus_g", accel_plus_g);
+               j.put("accel_minus_g", accel_minus_g);
+               j.put("accel", accel);
+               j.put("ground_accel", ground_accel);
+               j.put("ground_accel_avg", ground_accel_avg);
+               j.put("log_format", log_format);
+               j.put("log_space", log_space);
+               j.put("product", product);
+               j.put("baro", baro);
+               j.put("companion", companion);
+               j.put("pyro_fired", pyro_fired);
+               j.put("accel_zero_along", accel_zero_along);
+               j.put("accel_zero_across", accel_zero_across);
+               j.put("accel_zero_through", accel_zero_through);
+
+               j.put("rotation", rotation);
+               j.put("ground_rotation", ground_rotation);
+
+               j.put("pad_orientation", pad_orientation);
+
+               j.put("accel_ground_along", accel_ground_along);
+               j.put("accel_ground_across", accel_ground_across);
+               j.put("accel_ground_through", accel_ground_through);
+
+               j.put("gyro_zero_roll", gyro_zero_roll);
+               j.put("gyro_zero_pitch", gyro_zero_pitch);
+               j.put("gyro_zero_yaw", gyro_zero_yaw);
+
+               j.put("last_imu_time", last_imu_time);
+               return j;
+       }
+
+       public AltosState(AltosJson j) {
+               this();
+
+               set = j.get_int("set", set);
+               received_time = j.get_long("received_time", received_time);
+               time = j.get_double("time", time);
+               prev_time = j.get_double("prev_time", prev_time);
+               time_change = j.get_double("time_change", time_change);
+               tick = j.get_int("tick", tick);
+               prev_tick = j.get_int("prev_tick", prev_tick);
+               boost_tick = j.get_int("boost_tick", boost_tick);
+               state = j.get_int("state", state);
+               flight = j.get_int("flight", flight);
+               serial = j.get_int("serial", serial);
+               altitude_32 = j.get_int("altitude_32", altitude_32);
+               receiver_serial = j.get_int("receiver_serial", receiver_serial);
+               landed = j.get_boolean("landed", landed);
+               ascent = j.get_boolean("ascent", ascent);
+               boost = j.get_boolean("boost", boost);
+               rssi = j.get_int("rssi", rssi);
+               status = j.get_int("status", status);
+               device_type = j.get_int("device_type", device_type);
+               config_major = j.get_int("config_major", config_major);
+               config_minor = j.get_int("config_minor", config_minor);
+               apogee_delay = j.get_int("apogee_delay", apogee_delay);
+               main_deploy = j.get_int("main_deploy", main_deploy);
+               flight_log_max = j.get_int("flight_log_max", flight_log_max);
+               ground_altitude = AltosCValue_fromJson(j.get("ground_altitude"), ground_altitude);
+               gps_ground_altitude = AltosGpsGroundAltitude_fromJson(j.get("gps_ground_altitude"), gps_ground_altitude);
+               ground_pressure = AltosGroundPressure_fromJson(j.get("ground_pressure"), ground_pressure);
+               altitude = AltosAltitude_fromJson(j.get("altitude"), altitude);
+               gps_altitude = AltosGpsAltitude_fromJson(j.get("gps_altitude"), gps_altitude);
+               gps_ground_speed = AltosValue_fromJson(j.get("gps_ground_speed"), gps_ground_speed);
+               gps_ascent_rate = AltosValue_fromJson(j.get("gps_ascent_rate"), gps_ascent_rate);
+               gps_course = AltosValue_fromJson(j.get("gps_course"), gps_course);
+               gps_speed = AltosValue_fromJson(j.get("gps_speed"), gps_speed);
+               pressure = AltosPressure_fromJson(j.get("pressure"), pressure);
+               speed = AltosSpeed_fromJson(j.get("speed"), speed);
+               acceleration = AltosAccel_fromJson(j.get("acceleration"), acceleration);
+               orient = AltosCValue_fromJson(j.get("orient"), orient);
+               kalman_height = AltosValue_fromJson(j.get("kalman_height"), kalman_height);
+               kalman_speed = AltosValue_fromJson(j.get("kalman_speed"), kalman_speed);
+               kalman_acceleration = AltosValue_fromJson(j.get("kalman_acceleration"), kalman_acceleration);
+
+               battery_voltage = j.get_double("battery_voltage", battery_voltage);
+               pyro_voltage = j.get_double("pyro_voltage", pyro_voltage);
+               temperature = j.get_double("temperature", temperature);
+               apogee_voltage = j.get_double("apogee_voltage", apogee_voltage);
+               main_voltage=  j.get_double("main_voltage", main_voltage);
+               ignitor_voltage = j.get_double_array("ignitor_voltage", ignitor_voltage);
+               gps = AltosGPS.fromJson(j.get("gps"), gps);
+               temp_gps = AltosGPS.fromJson(j.get("temp_gps"), temp_gps);
+               temp_gps_sat_tick = j.get_int("temp_gps_sat_tick", temp_gps_sat_tick);
+               gps_pending = j.get_boolean("gps_pending", gps_pending);
+               gps_sequence = j.get_int("gps_sequence", gps_sequence);
+               imu = AltosIMU.fromJson(j.get("imu"), imu);
+               mag = AltosMag.fromJson(j.get("mag"), mag);
+
+               npad = j.get_int("npad", npad);
+               gps_waiting = j.get_int("gps_waiting", gps_waiting);
+               gps_ready = j.get_boolean("gps_ready", gps_ready);
+               ngps = j.get_int("ngps", ngps);
+               from_pad = AltosGreatCircle.fromJson(j.get("from_pad"), from_pad);
+               elevation = j.get_double("elevation", elevation);
+               range = j.get_double("range", range);
+               gps_height = j.get_double("gps_height", gps_height);
+               pad_lat = j.get_double("pad_lat", pad_lat);
+               pad_lon = j.get_double("pad_lon", pad_lon);
+               pad_alt = j.get_double("pad_alt", pad_alt);
+               speak_tick = j.get_int("speak_tick", speak_tick);
+               speak_altitude = j.get_double("speak_altitude", speak_altitude);
+               callsign = j.get_string("callsign", callsign);
+               firmware_version = j.get_string("firmware_version", firmware_version);
+               accel_plus_g = j.get_double("accel_plus_g", accel_plus_g);
+               accel_minus_g = j.get_double("accel_minus_g", accel_minus_g);
+               accel = j.get_double("accel", accel);
+               ground_accel = j.get_double("ground_accel", ground_accel);
+               ground_accel_avg = j.get_double("ground_accel_avg", ground_accel_avg);
+               log_format = j.get_int("log_format", log_format);
+               log_space = j.get_int("log_space", log_space);
+               product = j.get_string("product", product);
+               baro = AltosMs5607.fromJson(j.get("baro"), baro);
+               companion = AltosCompanion.fromJson(j.get("companion"), companion);
+               pyro_fired = j.get_int("pyro_fired", pyro_fired);
+               accel_zero_along = j.get_double("accel_zero_along", accel_zero_along);
+               accel_zero_across = j.get_double("accel_zero_across", accel_zero_across);
+               accel_zero_through = j.get_double("accel_zero_through", accel_zero_through);
+
+               rotation = AltosRotation.fromJson(j.get("rotation"), rotation);
+               ground_rotation = AltosRotation.fromJson(j.get("ground_rotation"), ground_rotation);
+
+               pad_orientation = j.get_int("pad_orientation", pad_orientation);
+
+               accel_ground_along = j.get_double("accel_ground_along", accel_ground_along);
+               accel_ground_across = j.get_double("accel_ground_across", accel_ground_across);
+               accel_ground_through = j.get_double("accel_ground_through", accel_ground_through);
+
+               gyro_zero_roll = j.get_double("gyro_zero_roll", gyro_zero_roll);
+               gyro_zero_pitch = j.get_double("gyro_zero_pitch", gyro_zero_pitch);
+               gyro_zero_yaw = j.get_double("gyro_zero_yaw", gyro_zero_yaw);
+
+               last_imu_time = j.get_double("last_imu_time", last_imu_time);
+       }
+
+       public static AltosState fromJson(AltosJson j) {
+               if (j == null)
+                       return null;
+               if (!j.get_boolean("valid", false))
+                       return null;
+               return new AltosState(j);
+       }
 }