/// AX.25 compliant packet header that contains destination, station call sign, and path.
/// 0x76 for SSID-11, 0x78 for SSID-12
-static const uint8_t TNC_AX25_HEADER[] = {
+static uint8_t TNC_AX25_HEADER[] = {
'A' << 1, 'P' << 1, 'A' << 1, 'M' << 1, ' ' << 1, ' ' << 1, 0x60, \
- 'K' << 1, 'D' << 1, '7' << 1, 'S' << 1, 'Q' << 1, 'G' << 1, 0x78, \
+ 'N' << 1, '0' << 1, 'C' << 1, 'A' << 1, 'L' << 1, 'L' << 1, 0x78, \
'W' << 1, 'I' << 1, 'D' << 1, 'E' << 1, '2' << 1, ' ' << 1, 0x65, \
0x03, 0xf0 };
+#define TNC_CALLSIGN_OFF 7
+#define TNC_CALLSIGN_LEN 6
+
+static void
+tncSetCallsign(void)
+{
+#ifndef AO_APRS_TEST
+ uint8_t i;
+
+ for (i = 0; i < TNC_CALLSIGN_LEN; i++) {
+ if (!ao_config.callsign[i])
+ break;
+ TNC_AX25_HEADER[TNC_CALLSIGN_OFF + i] = ao_config.callsign[i] << 1;
+ }
+ for (; i < TNC_CALLSIGN_LEN; i++)
+ TNC_AX25_HEADER[TNC_CALLSIGN_OFF + i] = ' ' << 1;
+#endif
+}
+
/// The next bit to transmit.
static uint8_t tncTxBit;
longitude = -longitude;
}
+ /* 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 + 50000) / 100000;
+ 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 + 50000) / 100000;
+ lon_frac = longitude / 100000;
if (altitude < 0)
altitude = 0;
- altitude = altitude * (int32_t) 1000 / (int32_t) 3048;
+ altitude = (altitude * (int32_t) 10000 + (3048/2)) / (int32_t) 3048;
return sprintf ((char *) tncBuffer, "=%02u%02u.%02u%c\\%03u%02u.%02u%cO /A=%06u\015",
lat_deg, lat_min, lat_frac, lat_sign,
timeInit();
tncInit();
+ tncSetCallsign();
tncLength = tncPositionPacket();
tncIndex = 0;
tncMode = TNC_TX_SYNC;
- ao_radio_send_lots(tncFill);
+ ao_radio_send_aprs(tncFill);
}
/** @} */