--- /dev/null
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "aoview.h"
+#include <math.h>
+
+static inline double sqr(double a) { return a * a; };
+
+static void
+aoview_great_circle (double start_lat, double start_lon,
+ double end_lat, double end_lon,
+ double *dist, double *bearing)
+{
+ const double rad = M_PI / 180;
+ const double earth_radius = 6371.2 * 1000; /* in meters */
+ double lat1 = rad * start_lat;
+ double lon1 = rad * -start_lon;
+ double lat2 = rad * end_lat;
+ double lon2 = rad * -end_lon;
+
+ double d_lat = lat2 - lat1;
+ double d_lon = lon2 - lon1;
+
+ /* From http://en.wikipedia.org/wiki/Great-circle_distance */
+ double vdn = sqrt(sqr(cos(lat2) * sin(d_lon)) +
+ sqr(cos(lat1) * sin(lat2) -
+ sin(lat1) * cos(lat2) * cos(d_lon)));
+ double vdd = sin(lat1) * sin(lat2) + cos(lat1) * cos(lat2) * cos(d_lon);
+ double d = atan2(vdn,vdd);
+ double course;
+
+ if (cos(lat1) < 1e-20) {
+ if (lat1 > 0)
+ course = M_PI;
+ else
+ course = -M_PI;
+ } else {
+ if (d < 1e-10)
+ course = 0;
+ else
+ course = acos((sin(lat2)-sin(lat1)*cos(d)) /
+ (sin(d)*cos(lat1)));
+ if (sin(lon2-lon1) > 0)
+ course = 2 * M_PI-course;
+ }
+ *dist = d * earth_radius;
+ *bearing = course * 180/M_PI;
+}
+
+static void
+aoview_state_add_deg(int column, char *label, double deg, char pos, char neg)
+{
+ double int_part;
+ double min;
+ char sign = pos;
+
+ if (deg < 0) {
+ deg = -deg;
+ sign = neg;
+ }
+ int_part = floor (deg);
+ min = (deg - int_part) * 60.0;
+ aoview_table_add_row(column, label, "%d°%lf'%c",
+ (int) int_part, min, sign);
+
+}
+
+static char *ascent_states[] = {
+ "boost",
+ "fast",
+ "coast",
+ 0,
+};
+
+static double
+aoview_time(void)
+{
+ struct timespec now;
+
+ clock_gettime(CLOCK_MONOTONIC, &now);
+ return (double) now.tv_sec + (double) now.tv_nsec / 1.0e9;
+}
+
+/*
+ * Fill out the derived data fields
+ */
+static void
+aoview_state_derive(struct aodata *data, struct aostate *state)
+{
+ int i;
+ double new_height;
+ double height_change;
+ double time_change;
+ int tick_count;
+
+ state->report_time = aoview_time();
+
+ state->prev_data = state->data;
+ state->prev_npad = state->npad;
+ state->data = *data;
+ tick_count = data->tick;
+ if (tick_count < state->prev_data.tick)
+ tick_count += 65536;
+ time_change = (tick_count - state->prev_data.tick) / 100.0;
+
+ state->ground_altitude = aoview_pres_to_altitude(data->ground_pres);
+ new_height = aoview_pres_to_altitude(data->flight_pres) - state->ground_altitude;
+ height_change = new_height - state->height;
+ state->height = new_height;
+ if (time_change)
+ state->baro_speed = (state->baro_speed * 3 + (height_change / time_change)) / 4.0;
+ state->acceleration = (data->ground_accel - data->flight_accel) / 27.0;
+ state->speed = data->flight_vel / 2700.0;
+ state->temperature = ((data->temp / 32767.0 * 3.3) - 0.5) / 0.01;
+ state->drogue_sense = data->drogue / 32767.0 * 15.0;
+ state->main_sense = data->main / 32767.0 * 15.0;
+ state->battery = data->batt / 32767.0 * 5.0;
+ if (!strcmp(data->state, "pad")) {
+ if (data->gps.gps_locked && data->gps.nsat >= 4) {
+ state->npad++;
+ state->pad_lat_total += data->gps.lat;
+ state->pad_lon_total += data->gps.lon;
+ state->pad_alt_total += data->gps.alt;
+ if (state->npad > 1) {
+ state->pad_lat = (state->pad_lat * 31 + data->gps.lat) / 32.0;
+ state->pad_lon = (state->pad_lon * 31 + data->gps.lon) / 32.0;
+ state->pad_alt = (state->pad_alt * 31 + data->gps.alt) / 32.0;
+ } else {
+ state->pad_lat = data->gps.lat;
+ state->pad_lon = data->gps.lon;
+ state->pad_alt = data->gps.alt;
+ }
+ }
+ }
+ state->ascent = FALSE;
+ for (i = 0; ascent_states[i]; i++)
+ if (!strcmp(data->state, ascent_states[i]))
+ state->ascent = TRUE;
+
+ /* Only look at accelerometer data on the way up */
+ if (state->ascent && state->acceleration > state->max_acceleration)
+ state->max_acceleration = state->acceleration;
+ if (state->ascent && state->speed > state->max_speed)
+ state->max_speed = state->speed;
+
+ if (state->height > state->max_height)
+ state->max_height = state->height;
+ state->gps.gps_locked = data->gps.gps_locked;
+ state->gps.gps_connected = data->gps.gps_connected;
+ if (data->gps.gps_locked) {
+ state->gps = data->gps;
+ state->gps_valid = 1;
+ if (state->npad)
+ aoview_great_circle(state->pad_lat, state->pad_lon, state->gps.lat, state->gps.lon,
+ &state->distance, &state->bearing);
+ }
+ if (data->gps_tracking.channels)
+ state->gps_tracking = data->gps_tracking;
+ if (state->npad) {
+ state->gps_height = state->gps.alt - state->pad_alt;
+ } else {
+ state->gps_height = 0;
+ }
+}
+
+void
+aoview_speak_state(struct aostate *state)
+{
+ if (strcmp(state->data.state, state->prev_data.state)) {
+ aoview_voice_speak("%s\n", state->data.state);
+ if (!strcmp(state->data.state, "drogue"))
+ aoview_voice_speak("apogee %d meters\n",
+ (int) state->max_height);
+ if (!strcmp(state->prev_data.state, "boost"))
+ aoview_voice_speak("max speed %d meters per second\n",
+ (int) state->max_speed);
+ }
+ if (state->prev_npad < MIN_PAD_SAMPLES && state->npad >= MIN_PAD_SAMPLES)
+ aoview_voice_speak("g p s ready\n");
+}
+
+void
+aoview_speak_height(struct aostate *state)
+{
+ aoview_voice_speak("%d meters\n", state->height);
+}
+
+struct aostate aostate;
+
+static guint aostate_timeout;
+
+#define COMPASS_LIMIT(n) ((n * 22.5) + 22.5/2)
+
+static char *compass_points[] = {
+ "north",
+ "north north east",
+ "north east",
+ "east north east",
+ "east",
+ "east south east",
+ "south east",
+ "south south east",
+ "south",
+ "south south west",
+ "south west",
+ "west south west",
+ "west",
+ "west north west",
+ "north west",
+ "north north west",
+};
+
+static char *
+aoview_compass_point(double bearing)
+{
+ int i;
+ while (bearing < 0)
+ bearing += 360.0;
+ while (bearing >= 360.0)
+ bearing -= 360.0;
+
+ i = floor ((bearing - 22.5/2) / 22.5 + 0.5);
+ if (i < 0) i = 0;
+ if (i >= sizeof (compass_points) / sizeof (compass_points[0]))
+ i = 0;
+ return compass_points[i];
+}
+
+static gboolean
+aoview_state_timeout(gpointer data)
+{
+ double now = aoview_time();
+
+ if (strlen(aostate.data.state) > 0 && strcmp(aostate.data.state, "pad") != 0)
+ aoview_speak_height(&aostate);
+ if (now - aostate.report_time >= 20 || !strcmp(aostate.data.state, "landed")) {
+ if (!aostate.ascent) {
+ if (fabs(aostate.baro_speed) < 20 && aostate.height < 100)
+ aoview_voice_speak("rocket landed safely\n");
+ else
+ aoview_voice_speak("rocket may have crashed\n");
+ if (aostate.gps_valid) {
+ aoview_voice_speak("rocket reported %s of pad distance %d meters\n",
+ aoview_compass_point(aostate.bearing),
+ (int) aostate.distance);
+ }
+ }
+ aostate_timeout = 0;
+ return FALSE;
+ }
+ return TRUE;
+}
+
+void
+aoview_state_reset(void)
+{
+ memset(&aostate, '\0', sizeof (aostate));
+}
+
+void
+aoview_state_notify(struct aodata *data)
+{
+ struct aostate *state = &aostate;
+ aoview_state_derive(data, state);
+ aoview_table_start();
+
+ if (state->npad >= MIN_PAD_SAMPLES)
+ aoview_table_add_row(0, "Ground state", "ready");
+ else
+ aoview_table_add_row(0, "Ground state", "waiting for gps (%d)",
+ MIN_PAD_SAMPLES - state->npad);
+ aoview_table_add_row(0, "Rocket state", "%s", state->data.state);
+ aoview_table_add_row(0, "Callsign", "%s", state->data.callsign);
+ aoview_table_add_row(0, "Rocket serial", "%d", state->data.serial);
+
+ aoview_table_add_row(0, "RSSI", "%6ddBm", state->data.rssi);
+ aoview_table_add_row(0, "Height", "%6dm", state->height);
+ aoview_table_add_row(0, "Max height", "%6dm", state->max_height);
+ aoview_table_add_row(0, "Acceleration", "%7.1fm/s²", state->acceleration);
+ aoview_table_add_row(0, "Max acceleration", "%7.1fm/s²", state->max_acceleration);
+ aoview_table_add_row(0, "Speed", "%7.1fm/s", state->ascent ? state->speed : state->baro_speed);
+ aoview_table_add_row(0, "Max Speed", "%7.1fm/s", state->max_speed);
+ aoview_table_add_row(0, "Temperature", "%6.2f°C", state->temperature);
+ aoview_table_add_row(0, "Battery", "%5.2fV", state->battery);
+ aoview_table_add_row(0, "Drogue", "%5.2fV", state->drogue_sense);
+ aoview_table_add_row(0, "Main", "%5.2fV", state->main_sense);
+ aoview_table_add_row(0, "Pad altitude", "%dm", state->ground_altitude);
+ aoview_table_add_row(1, "Satellites", "%d", state->gps.nsat);
+ if (state->gps.gps_locked) {
+ aoview_table_add_row(1, "GPS", "locked");
+ } else if (state->gps.gps_connected) {
+ aoview_table_add_row(1, "GPS", "unlocked");
+ } else {
+ aoview_table_add_row(1, "GPS", "not available");
+ }
+ if (state->gps_valid) {
+ aoview_state_add_deg(1, "Latitude", state->gps.lat, 'N', 'S');
+ aoview_state_add_deg(1, "Longitude", state->gps.lon, 'E', 'W');
+ aoview_table_add_row(1, "GPS altitude", "%d", state->gps.alt);
+ aoview_table_add_row(1, "GPS height", "%d", state->gps_height);
+ aoview_table_add_row(1, "GPS time", "%02d:%02d:%02d",
+ state->gps.gps_time.hour,
+ state->gps.gps_time.minute,
+ state->gps.gps_time.second);
+ }
+ if (state->gps.gps_extended) {
+ aoview_table_add_row(1, "GPS ground speed", "%7.1fm/s %d°",
+ state->gps.ground_speed,
+ state->gps.course);
+ aoview_table_add_row(1, "GPS climb rate", "%7.1fm/s",
+ state->gps.climb_rate);
+ aoview_table_add_row(1, "GPS precision", "%4.1f(hdop) %3dm(h) %3dm(v)",
+ state->gps.hdop, state->gps.h_error, state->gps.v_error);
+ }
+ if (state->npad) {
+ aoview_table_add_row(1, "Distance from pad", "%5.0fm", state->distance);
+ aoview_table_add_row(1, "Direction from pad", "%4.0f°", state->bearing);
+ aoview_state_add_deg(1, "Pad latitude", state->pad_lat, 'N', 'S');
+ aoview_state_add_deg(1, "Pad longitude", state->pad_lon, 'E', 'W');
+ aoview_table_add_row(1, "Pad GPS alt", "%gm", state->pad_alt);
+ }
+ if (state->gps.gps_connected) {
+ int nsat_vis = 0;
+ int nsat_locked = 0;
+ int c;
+
+ for (c = 0; c < state->gps_tracking.channels; c++) {
+ if ((state->gps_tracking.sats[c].state & 0xff) == 0xbf)
+ nsat_locked++;
+ }
+ aoview_table_add_row(2, "Satellites Visible", "%d", state->gps_tracking.channels);
+ aoview_table_add_row(2, "Satellites Locked", "%d", nsat_locked);
+ for (c = 0; c < state->gps_tracking.channels; c++) {
+ aoview_table_add_row(2, "Satellite id,state,C/N0",
+ "%3d,%02x,%2d%s",
+ state->gps_tracking.sats[c].svid,
+ state->gps_tracking.sats[c].state,
+ state->gps_tracking.sats[c].c_n0,
+ (state->gps_tracking.sats[c].state & 0xff) == 0xbf ?
+ " LOCKED" : "");
+ }
+ }
+ aoview_table_finish();
+ aoview_label_show(state);
+ aoview_speak_state(state);
+ if (!aostate_timeout && strcmp(state->data.state, "pad") != 0)
+ aostate_timeout = g_timeout_add_seconds(10, aoview_state_timeout, NULL);
+}
+
+void
+aoview_state_new(void)
+{
+}
+
+void
+aoview_state_init(GladeXML *xml)
+{
+ aoview_state_new();
+}
projects / fw / altos / blobdiff