git.gag.com Git - fw/altos/blob - aoview/aoview_monitor.c

   1 /*
   2  * Copyright © 2009 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 #include "aoview.h"
  19
  20 static struct aoview_serial *monitor_serial;
  21
  22 #define MONITOR_LEN     1024
  23
  24 static char     monitor_line[MONITOR_LEN + 1];
  25 static int      monitor_pos;
  26
  27 void
  28 aoview_monitor_disconnect(void)
  29 {
  30         if (monitor_serial) {
  31                 aoview_serial_close(monitor_serial);
  32                 monitor_serial = NULL;
  33         }
  34         aoview_table_clear();
  35         aoview_log_new();
  36 }
  37
  38 static void
  39 aoview_parse_string(char *target, int len, char *source)
  40 {
  41         strncpy(target, source, len-1);
  42         target[len-1] = '\0';
  43 }
  44
  45 static void
  46 aoview_parse_int(int *target, char *source)
  47 {
  48         *target = strtol(source, NULL, 0);
  49 }
  50
  51 static void
  52 aoview_parse_pos(double *target, char *source)
  53 {
  54         int     deg;
  55         double  min;
  56         char    dir;
  57         double  r;
  58
  59         if (sscanf(source, "%d°%lf'%c", &deg, &min, &dir) != 3) {
  60                 *target = 0;
  61                 return;
  62         }
  63         r = deg + min / 60.0;
  64         if (dir == 'S' || dir == 'W')
  65                 r = -r;
  66         *target = r;
  67 }
  68
  69 static void
  70 aoview_monitor_parse(char *line)
  71 {
  72         char *saveptr;
  73         char *words[64];
  74         int nword;
  75         struct aostate  state;
  76
  77         if (aoview_log_get_serial())
  78                 aoview_log_printf ("%s\n", line);
  79         for (nword = 0; nword < 64; nword++) {
  80                 words[nword] = strtok_r(line, " \t\n", &saveptr);
  81                 line = NULL;
  82                 if (words[nword] == NULL)
  83                         break;
  84         }
  85         if (nword < 36)
  86                 return;
  87         if (strcmp(words[0], "CALL") != 0)
  88                 return;
  89         aoview_parse_string(state.callsign, sizeof (state.callsign), words[1]);
  90         aoview_parse_int(&state.serial, words[3]);
  91         if (!aoview_log_get_serial())
  92                 aoview_log_set_serial(state.serial);
  93
  94         aoview_parse_int(&state.rssi, words[5]);
  95         aoview_parse_string(state.state, sizeof (state.state), words[9]);
  96         aoview_parse_int(&state.tick, words[10]);
  97         aoview_parse_int(&state.accel, words[12]);
  98         aoview_parse_int(&state.pres, words[14]);
  99         aoview_parse_int(&state.temp, words[16]);
 100         aoview_parse_int(&state.batt, words[18]);
 101         aoview_parse_int(&state.drogue, words[20]);
 102         aoview_parse_int(&state.main, words[22]);
 103         aoview_parse_int(&state.flight_accel, words[24]);
 104         aoview_parse_int(&state.ground_accel, words[26]);
 105         aoview_parse_int(&state.flight_vel, words[28]);
 106         aoview_parse_int(&state.flight_pres, words[30]);
 107         aoview_parse_int(&state.ground_pres, words[32]);
 108         aoview_parse_int(&state.nsat, words[34]);
 109         if (strcmp (words[36], "unlocked") != 0 && nword >= 40) {
 110                 state.locked = 1;
 111                 sscanf(words[36], "%d:%d:%d", &state.gps_time.hour, &state.gps_time.minute, &state.gps_time.second);
 112                 aoview_parse_pos(&state.lat, words[37]);
 113                 aoview_parse_pos(&state.lon, words[38]);
 114                 sscanf(words[39], "%dm", &state.alt);
 115         } else {
 116                 state.locked = 0;
 117                 state.gps_time.hour = state.gps_time.minute = state.gps_time.second = 0;
 118                 state.lat = state.lon = 0;
 119                 state.alt = 0;
 120         }
 121         aoview_state_notify(&state);
 122 }
 123
 124 static void
 125 aoview_monitor_callback(gpointer user_data,
 126                         struct aoview_serial *serial,
 127                         gint revents)
 128 {
 129         int     c;
 130
 131         if (revents & (G_IO_HUP|G_IO_ERR)) {
 132                 aoview_monitor_disconnect();
 133                 return;
 134         }
 135         if (revents & G_IO_IN) {
 136                 for (;;) {
 137                         c = aoview_serial_getc(serial);
 138                         if (c == -1)
 139                                 break;
 140                         if (c == '\r')
 141                                 continue;
 142                         if (c == '\n') {
 143                                 monitor_line[monitor_pos] = '\0';
 144                                 if (monitor_pos)
 145                                 aoview_monitor_parse(monitor_line);
 146                                 monitor_pos = 0;
 147                         } else if (monitor_pos < MONITOR_LEN)
 148                                 monitor_line[monitor_pos++] = c;
 149                 }
 150         }
 151 }
 152
 153 gboolean
 154 aoview_monitor_connect(char *tty)
 155 {
 156         aoview_monitor_disconnect();
 157         monitor_serial = aoview_serial_open(tty);
 158         if (!monitor_serial)
 159                 return FALSE;
 160         aoview_serial_set_callback(monitor_serial,
 161                                    aoview_monitor_callback,
 162                                    monitor_serial,
 163                                    NULL);
 164         return TRUE;
 165 }