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 }
  35
  36 static void
  37 aoview_parse_string(char *target, int len, char *source)
  38 {
  39         strncpy(target, source, len-1);
  40         target[len-1] = '\0';
  41 }
  42
  43 static void
  44 aoview_parse_int(int *target, char *source)
  45 {
  46         *target = strtol(source, NULL, 0);
  47 }
  48
  49 static void
  50 aoview_parse_pos(double *target, char *source)
  51 {
  52         int     deg;
  53         double  min;
  54         char    dir;
  55         double  r;
  56
  57         if (sscanf(source, "%d°%lf'%c", &deg, &min, &dir) != 3) {
  58                 *target = 0;
  59                 return;
  60         }
  61         r = deg + min / 60.0;
  62         if (dir == 'S' || dir == 'W')
  63                 r = -r;
  64         *target = r;
  65 }
  66
  67 static void
  68 aoview_monitor_parse(char *line)
  69 {
  70         char *saveptr;
  71         char *words[64];
  72         int nword;
  73         struct aostate  state;
  74
  75         printf ("%s\n", line);
  76         for (nword = 0; nword < 64; nword++) {
  77                 words[nword] = strtok_r(line, " \t\n", &saveptr);
  78                 line = NULL;
  79                 if (words[nword] == NULL)
  80                         break;
  81         }
  82         if (nword < 26)
  83                 return;
  84         if (strcmp(words[0], "CALL") != 0)
  85                 return;
  86         aoview_parse_string(state.callsign, sizeof (state.callsign), words[1]);
  87         aoview_parse_int(&state.serial, words[3]);
  88         aoview_parse_int(&state.rssi, words[5]);
  89         aoview_parse_string(state.state, sizeof (state.state), words[9]);
  90         aoview_parse_int(&state.tick, words[10]);
  91         aoview_parse_int(&state.accel, words[12]);
  92         aoview_parse_int(&state.pres, words[14]);
  93         aoview_parse_int(&state.temp, words[16]);
  94         aoview_parse_int(&state.batt, words[18]);
  95         aoview_parse_int(&state.drogue, words[20]);
  96         aoview_parse_int(&state.main, words[22]);
  97         if (strcmp (words[26], "unlocked") != 0 && nword >= 29) {
  98                 sscanf(words[26], "%d:%d:%d", &state.gps_time.hour, &state.gps_time.minute, &state.gps_time.second);
  99                 aoview_parse_pos(&state.lat, words[27]);
 100                 aoview_parse_pos(&state.lon, words[28]);
 101                 sscanf(words[29], "%dm", &state.alt);
 102         } else {
 103                 state.gps_time.hour = state.gps_time.minute = state.gps_time.second = 0;
 104                 state.lat = state.lon = 0;
 105                 state.alt = 0;
 106         }
 107         aoview_state_notify(&state);
 108 }
 109
 110 static gboolean
 111 aoview_monitor_callback(void *user_data)
 112 {
 113         int     c;
 114
 115         if (!monitor_serial)
 116                 return FALSE;
 117
 118         for (;;) {
 119                 c = aoview_serial_getc(monitor_serial);
 120                 if (c == -1)
 121                         break;
 122                 if (c == '\r')
 123                         continue;
 124                 if (c == '\n') {
 125                         monitor_line[monitor_pos] = '\0';
 126                         if (monitor_pos)
 127                         aoview_monitor_parse(monitor_line);
 128                         monitor_pos = 0;
 129                 } else if (monitor_pos < MONITOR_LEN)
 130                         monitor_line[monitor_pos++] = c;
 131         }
 132         return TRUE;
 133 }
 134
 135 void
 136 aoview_monitor_connect(char *tty)
 137 {
 138         aoview_monitor_disconnect();
 139         monitor_serial = aoview_serial_open(tty);
 140         aoview_serial_set_callback(monitor_serial,
 141                                    aoview_monitor_callback,
 142                                    monitor_serial,
 143                                    NULL);
 144 }