}
}
+static int ao_num_sats(void)
+{
+ int i;
+ int n = 0;
+
+ for (i = 0; i < ao_gps_tracking_data.channels; i++) {
+ if (ao_gps_tracking_data.sats[i].svid)
+ n++;
+ }
+ return n;
+}
+
+static char ao_gps_locked(void)
+{
+ if (ao_gps_data.flags & AO_GPS_VALID)
+ return 'L';
+ else
+ return 'U';
+}
+
+static int tncComment(uint8_t *buf)
+{
+#if HAS_ADC
+ struct ao_data packet;
+
+ ao_arch_critical(ao_data_get(&packet););
+
+ int16_t battery = ao_battery_decivolt(packet.adc.v_batt);
+ int16_t apogee = ao_ignite_decivolt(AO_SENSE_DROGUE(&packet));
+ int16_t main = ao_ignite_decivolt(AO_SENSE_MAIN(&packet));
+
+ return sprintf((char *) buf,
+ "%c%d B%d.%d A%d.%d M%d.%d",
+ ao_gps_locked(),
+ ao_num_sats(),
+ battery/10,
+ battery % 10,
+ apogee/10,
+ apogee%10,
+ main/10,
+ main%10);
+#else
+ return sprintf((char *) buf,
+ "%c%d",
+ ao_gps_locked(),
+ ao_num_sats());
+#endif
+}
+
/**
* Generate the plain text position packet.
*/
static int tncPositionPacket(void)
{
- int32_t latitude = ao_gps_data.latitude;
- int32_t longitude = ao_gps_data.longitude;
- int32_t altitude = ao_gps_data.altitude;
+ static int32_t latitude;
+ static int32_t longitude;
+ static int32_t altitude;
+ int32_t lat, lon, alt;
uint8_t *buf;
- if (altitude < 0)
- altitude = 0;
- altitude = (altitude * (int32_t) 10000 + (3048/2)) / (int32_t) 3048;
-
-#if 0
- char lat_sign = 'N', lon_sign = 'E';
- uint16_t lat_deg;
- uint16_t lon_deg;
- uint16_t lat_min;
- uint16_t lat_frac;
- uint16_t lon_min;
- uint16_t lon_frac;
-
- if (latitude < 0) {
- lat_sign = 'S';
- latitude = -latitude;
- }
-
- if (longitude < 0) {
- lon_sign = 'W';
- longitude = -longitude;
+ if (ao_gps_data.flags & AO_GPS_VALID) {
+ latitude = ao_gps_data.latitude;
+ longitude = ao_gps_data.longitude;
+ altitude = ao_gps_data.altitude;
+ if (altitude < 0)
+ altitude = 0;
}
- /* Round latitude and longitude by 0.005 minutes */
- latitude = latitude + 833;
- if (latitude > 900000000)
- latitude = 900000000;
- longitude = longitude + 833;
- if (longitude > 1800000000)
- longitude = 1800000000;
-
- lat_deg = latitude / 10000000;
- latitude -= lat_deg * 10000000;
- latitude *= 60;
- lat_min = latitude / 10000000;
- latitude -= lat_min * 10000000;
- lat_frac = latitude / 100000;
-
- lon_deg = longitude / 10000000;
- longitude -= lon_deg * 10000000;
- longitude *= 60;
- lon_min = longitude / 10000000;
- longitude -= lon_min * 10000000;
- lon_frac = longitude / 100000;
-
-#if 0
- return sprintf ((char *) tncBuffer, "=%02u%02u.%02u%c\\%03u%02u.%02u%cO /A=%06u\015",
- lat_deg, lat_min, lat_frac, lat_sign,
- lon_deg, lon_min, lon_frac, lon_sign,
- altitude);
-#endif
-
- return sprintf ((char *) tncBuffer, "/%02u%02u%02uh%02u%02u.%02u%c/%03u%02u.%02u%c'/A=%06u\015",
- ao_gps_data.hour,
- ao_gps_data.minute,
- ao_gps_data.second,
- lat_deg, lat_min, lat_frac, lat_sign,
- lon_deg, lon_min, lon_frac, lon_sign,
- altitude);
-#endif
buf = tncBuffer;
-#if APRS_TIME
- sprintf ((char *) buf, "/%02u%02u%02uh",
- ao_gps_data.hour,
- ao_gps_data.minute,
- ao_gps_data.second);
- buf += 8;
-#else
*buf++ = '!';
-#endif
/* Symbol table ID */
*buf++ = '/';
- latitude = ((uint64_t) 380926 * (900000000 - latitude)) / 10000000;
- longitude = ((uint64_t) 190463 * (1800000000 + longitude)) / 10000000;
+ lat = ((uint64_t) 380926 * (900000000 - latitude)) / 10000000;
+ lon = ((uint64_t) 190463 * (1800000000 + longitude)) / 10000000;
#define ALTITUDE_LOG_BASE 0.001998002662673f /* log(1.002) */
- altitude = logf((float) altitude) * (1/ALTITUDE_LOG_BASE);
+ alt = (altitude * (int32_t) 10000 + (3048/2)) / (int32_t) 3048;
+ alt = logf((float) altitude) * (1/ALTITUDE_LOG_BASE);
- tncCompressInt(buf, latitude, 4);
+ tncCompressInt(buf, lat, 4);
buf += 4;
- tncCompressInt(buf, longitude, 4);
+ tncCompressInt(buf, lon, 4);
buf += 4;
/* Symbol code */
*buf++ = '\'';
- tncCompressInt(buf, altitude, 2);
+ tncCompressInt(buf, alt, 2);
buf += 2;
*buf++ = 33 + ((1 << 5) | (2 << 3));
- *buf++ = '\0';
+
+ buf += tncComment(buf);
+
return buf - tncBuffer;
}