diff options
Diffstat (limited to 'ao-view/aoview_state.c')
| -rw-r--r-- | ao-view/aoview_state.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/ao-view/aoview_state.c b/ao-view/aoview_state.c new file mode 100644 index 00000000..7efd33b0 --- /dev/null +++ b/ao-view/aoview_state.c @@ -0,0 +1,349 @@ +/* + * 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 (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 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); + } + 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(); +} |