altoslib: Add TeleGPS log parsing code

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 159 insertions, 0 deletions

diff --git a/altoslib/AltosEepromGPS.java b/altoslib/AltosEepromGPS.java
new file mode 100644
index 00000000..33172eed
--- /dev/null
+++ b/altoslib/AltosEepromGPS.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright © 2014 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.
+ */
+
+package org.altusmetrum.altoslib_4;
+
+import java.io.*;
+import java.util.*;
+import java.text.*;
+
+public class AltosEepromGPS extends AltosEeprom {
+	public static final int	record_length = 32;
+
+	public static final int max_sat = 12;
+
+	public int record_length() { return record_length; }
+
+	/* AO_LOG_FLIGHT elements */
+	public int flight() { return data16(0); }
+	public int start_altitude() { return data16(2); }
+	public int start_latitude() { return data32(4); }
+	public int start_longitude() { return data32(8); }
+
+	/* AO_LOG_GPS_TIME elements */
+	public int latitude() { return data32(0); }
+	public int longitude() { return data32(4); }
+	public int altitude() { return data16(8); }
+	public int hour() { return data8(10); }
+	public int minute() { return data8(11); }
+	public int second() { return data8(12); }
+	public int flags() { return data8(13); }
+	public int year() { return data8(14); }
+	public int month() { return data8(15); }
+	public int day() { return data8(16); }
+	public int course() { return data8(17); }
+	public int ground_speed() { return data16(18); }
+	public int climb_rate() { return data16(20); }
+	public int pdop() { return data8(22); }
+	public int hdop() { return data8(23); }
+	public int vdop() { return data8(24); }
+	public int mode() { return data8(25); }
+	public int state() { return data8(26); }
+
+	/* AO_LOG_GPS_SAT elements */
+	public int nsat() { return data16(0); }
+	public int svid(int n) { return data8(2 + n * 2); }
+	public int c_n(int n) { return data8(2 + n * 2 + 1); }
+
+	public AltosEepromGPS (AltosEepromChunk chunk, int start) throws ParseException {
+		parse_chunk(chunk, start);
+	}
+
+	public void update_state(AltosState state) {
+		super.update_state(state);
+
+		AltosGPS	gps;
+
+		/* Flush any pending GPS changes */
+		if (state.gps_pending) {
+			switch (cmd) {
+			case AltosLib.AO_LOG_GPS_LAT:
+			case AltosLib.AO_LOG_GPS_LON:
+			case AltosLib.AO_LOG_GPS_ALT:
+			case AltosLib.AO_LOG_GPS_SAT:
+			case AltosLib.AO_LOG_GPS_DATE:
+				break;
+			default:
+				state.set_temp_gps();
+				break;
+			}
+		}
+
+		switch (cmd) {
+		case AltosLib.AO_LOG_FLIGHT:
+			state.set_boost_tick(tick);
+			state.set_flight(flight());
+			/* no place to log start lat/lon yet */
+			break;
+		case AltosLib.AO_LOG_GPS_TIME:
+			state.set_tick(tick);
+			state.set_state(state());
+			gps = state.make_temp_gps(false);
+			gps.lat = latitude() / 1e7;
+			gps.lon = longitude() / 1e7;
+			gps.alt = altitude();
+
+			gps.hour = hour();
+			gps.minute = minute();
+			gps.second = second();
+
+			int flags = flags();
+
+			gps.connected = (flags & AltosLib.AO_GPS_RUNNING) != 0;
+			gps.locked = (flags & AltosLib.AO_GPS_VALID) != 0;
+			gps.nsat = (flags & AltosLib.AO_GPS_NUM_SAT_MASK) >>
+				AltosLib.AO_GPS_NUM_SAT_SHIFT;
+
+			gps.year = 2000 + year();
+			gps.month = month();
+			gps.day = day();
+			gps.ground_speed = ground_speed() * 1.0e-2;
+			gps.course = course() * 2;
+			gps.climb_rate = climb_rate() * 1.0e-2;
+			gps.hdop = hdop();
+			gps.vdop = vdop();
+			break;
+		case AltosLib.AO_LOG_GPS_SAT:
+			state.set_tick(tick);
+			gps = state.make_temp_gps(true);
+
+			int n = nsat();
+			if (n > max_sat)
+				n = max_sat;
+			for (int i = 0; i < n; i++)
+				gps.add_sat(svid(i), c_n(i));
+			break;
+		}
+	}
+
+	public AltosEepromGPS (String line) {
+		parse_string(line);
+	}
+
+	static public LinkedList<AltosEeprom> read(FileInputStream input) {
+		LinkedList<AltosEeprom> tgpss = new LinkedList<AltosEeprom>();
+
+		for (;;) {
+			try {
+				String line = AltosLib.gets(input);
+				if (line == null)
+					break;
+				try {
+					AltosEepromGPS tgps = new AltosEepromGPS(line);
+					if (tgps.cmd != AltosLib.AO_LOG_INVALID)
+						tgpss.add(tgps);
+				} catch (Exception e) {
+					System.out.printf ("exception\n");
+				}
+			} catch (IOException ie) {
+				break;
+			}
+		}
+
+		return tgpss;
+	}
+}