altoslib: Add new eeprom management code

Generic .eeprom file parsing, simpler per-type eeprom data extraction.

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

1 files changed, 81 insertions, 0 deletions

diff --git a/altoslib/AltosEepromRecordTiny.java b/altoslib/AltosEepromRecordTiny.java
new file mode 100644
index 00000000..6c04bfee
--- /dev/null
+++ b/altoslib/AltosEepromRecordTiny.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright © 2017 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+package org.altusmetrum.altoslib_11;
+
+public class AltosEepromRecordTiny extends AltosEepromRecord {
+	public static final int	record_length = 2;
+
+	private int value() {
+		return eeprom.data16(start);
+	}
+
+	public int cmd() {
+		if (start == 0)
+			return AltosLib.AO_LOG_FLIGHT;
+		if ((value() & 0x8000) != 0)
+			return AltosLib.AO_LOG_STATE;
+		return AltosLib.AO_LOG_SENSOR;
+	}
+
+	public int tick() {
+		int	tick = 0;
+		int	step = 10;
+		for (int i = 2; i < start; i += 2)
+		{
+			int v = eeprom.data16(i);
+
+			if ((v & 0x8000) != 0) {
+				if ((v & 0x7fff) >= AltosLib.ao_flight_drogue)
+					step = 100;
+			} else {
+				tick += step;
+			}
+		}
+		return tick;
+	}
+
+	public void update_state(AltosState state) {
+		int value = data16(-header_length);
+
+		state.set_tick(tick());
+		switch (cmd()) {
+		case AltosLib.AO_LOG_FLIGHT:
+			state.set_state(AltosLib.ao_flight_pad);
+			state.set_flight(value);
+			state.set_boost_tick(0);
+			break;
+		case AltosLib.AO_LOG_STATE:
+			state.set_state(value & 0x7fff);
+			break;
+		case AltosLib.AO_LOG_SENSOR:
+			state.set_pressure(AltosConvert.barometer_to_pressure(value));
+			break;
+		}
+	}
+
+	public AltosEepromRecord next() {
+		if (start + record_length * 2 < eeprom.data.size())
+			return new AltosEepromRecordTiny(eeprom, start + record_length);
+		return null;
+	}
+
+	public AltosEepromRecordTiny(AltosEepromNew eeprom, int start) {
+		super(eeprom, start, record_length);
+	}
+
+	public AltosEepromRecordTiny(AltosEepromNew eeprom) {
+		this(eeprom, 0);
+	}
+}