diff options
Diffstat (limited to 'ao-tools/altosui/AltosEepromReader.java')
| -rw-r--r-- | ao-tools/altosui/AltosEepromReader.java | 99 |
1 files changed, 98 insertions, 1 deletions
diff --git a/ao-tools/altosui/AltosEepromReader.java b/ao-tools/altosui/AltosEepromReader.java index 3f2d4c62..0705d44e 100644 --- a/ao-tools/altosui/AltosEepromReader.java +++ b/ao-tools/altosui/AltosEepromReader.java @@ -42,7 +42,7 @@ import altosui.AltosEepromMonitor; */ class AltosOrderedRecord extends AltosEepromRecord implements Comparable<AltosOrderedRecord> { - int index; + public int index; public AltosOrderedRecord(String line, int in_index, int prev_tick) throws ParseException { @@ -56,6 +56,11 @@ class AltosOrderedRecord extends AltosEepromRecord implements Comparable<AltosOr index = in_index; } + public AltosOrderedRecord(int in_cmd, int in_tick, int in_a, int in_b, int in_index) { + super(in_cmd, in_tick, in_a, in_b); + index = in_index; + } + public int compareTo(AltosOrderedRecord o) { int tick_diff = tick - o.tick; if (tick_diff != 0) @@ -100,6 +105,10 @@ public class AltosEepromReader extends AltosReader { int boost_tick; + boolean saw_gps_date; + + boolean missing_gps_time; + public AltosRecord read() throws IOException, ParseException { for (;;) { if (record == null) { @@ -168,6 +177,12 @@ public class AltosEepromReader extends AltosReader { state.gps.date_valid = (flags & Altos.AO_GPS_DATE_VALID) != 0; state.gps.nsat = (flags & Altos.AO_GPS_NUM_SAT_MASK) >> Altos.AO_GPS_NUM_SAT_SHIFT; + System.out.printf("GPS %2d:%02d:%02d%s%s%s %d\n", + state.gps.hour, state.gps.minute, state.gps.second, + state.gps.connected ? " connected" : "", + state.gps.locked ? " locked" : "", + state.gps.date_valid ? " date_valid" : "", + state.gps.nsat); break; case Altos.AO_LOG_GPS_LAT: int lat32 = record.a | (record.b << 16); @@ -268,6 +283,38 @@ public class AltosEepromReader extends AltosReader { } /* + * Given an AO_LOG_GPS_TIME record with correct time, and one + * missing time, rewrite the missing time values with the good + * ones, assuming that the difference between them is 'diff' seconds + */ + void update_time(AltosOrderedRecord good, AltosOrderedRecord bad) { + + int diff = (bad.tick - good.tick + 50) / 100; + + int hour = (good.a & 0xff); + int minute = (good.a >> 8); + int second = (good.b & 0xff); + int flags = (good.b >> 8); + int seconds = hour * 3600 + minute * 60 + second; + + int new_seconds = seconds + diff; + if (new_seconds < 0) + new_seconds += 24 * 3600; + int new_second = (new_seconds % 60); + int new_minutes = (new_seconds / 60); + int new_minute = (new_minutes % 60); + int new_hours = (new_minutes / 60); + int new_hour = (new_hours % 24); + + System.out.printf("Synthesizing time good %2d:%02d:%02d bad %2d:%02d:%02d\n", + hour, minute, second, + new_hour, new_minute, new_second); + + bad.a = new_hour + (new_minute << 8); + bad.b = new_second + (flags << 8); + } + + /* * Read the whole file, dumping records into a RB tree so * we can enumerate them in time order -- the eeprom data * are sometimes out of order with GPS data getting timestamps @@ -282,9 +329,13 @@ public class AltosEepromReader extends AltosReader { seen = 0; records = new TreeSet<AltosOrderedRecord>(); + AltosOrderedRecord last_gps_time = null; + int index = 0; int tick = 0; + boolean missing_time = false; + try { for (;;) { String line = AltosRecord.gets(input); @@ -300,6 +351,52 @@ public class AltosEepromReader extends AltosReader { saw_boost = true; boost_tick = tick; } + + /* Two firmware bugs caused the loss of some GPS data. + * The flight date would never be recorded, and often + * the flight time would get overwritten by another + * record. Detect the loss of the GPS date and fix up the + * missing time records + */ + if (record.cmd == Altos.AO_LOG_GPS_DATE) + saw_gps_date = true; + + /* go back and fix up any missing time values */ + if (record.cmd == Altos.AO_LOG_GPS_TIME) { + last_gps_time = record; + if (missing_time) { + System.out.printf("Going back to clean up broken GPS time records\n"); + Iterator<AltosOrderedRecord> iterator = records.iterator(); + while (iterator.hasNext()) { + AltosOrderedRecord old = iterator.next(); + if (old.cmd == Altos.AO_LOG_GPS_TIME) { + System.out.printf("Old time record %d, %d\n", old.a, old.b); + } + if (old.cmd == Altos.AO_LOG_GPS_TIME && + old.a == -1 && old.b == -1) + { + update_time(record, old); + } + } + missing_time = false; + } + } + + if (record.cmd == Altos.AO_LOG_GPS_LAT) { + if (last_gps_time == null || last_gps_time.tick != record.tick) { + AltosOrderedRecord add_gps_time = new AltosOrderedRecord(Altos.AO_LOG_GPS_TIME, + record.tick, + -1, -1, index-1); + if (last_gps_time != null) + update_time(last_gps_time, add_gps_time); + else { + System.out.printf("early GPS missing time\n"); + missing_time = true; + } + records.add(add_gps_time); + record.index = index++; + } + } records.add(record); } } catch (IOException io) { |