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, 95 insertions, 0 deletions

diff --git a/altoslib/AltosEepromRecord.java b/altoslib/AltosEepromRecord.java
new file mode 100644
index 00000000..efcca857
--- /dev/null
+++ b/altoslib/AltosEepromRecord.java
@@ -0,0 +1,95 @@
+/*
+ * 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 abstract class AltosEepromRecord implements Comparable<AltosEepromRecord> {
+
+	AltosEepromNew		eeprom;
+
+	int			wide_tick;
+
+	final int		start;
+	final int		length;
+
+	public final static int header_length = 4;
+
+	public int cmd() {
+		return eeprom.data8(start);
+	}
+
+	public int tick() {
+		return eeprom.data16(start+2);
+	}
+
+	public int data8(int i) {
+		i += start + header_length;
+		return eeprom.data8(i);
+	}
+
+	public int data16(int i) {
+		return ((data8(i) | (data8(i+1) << 8)) << 16) >> 16;
+	}
+
+	public int data24(int i) {
+		return data8(i) | (data8(i+1) << 8) | (data8(i+2) << 16);
+	}
+
+	public int data32(int i) {
+		return data8(i) | (data8(i+1) << 8) | (data8(i+2) << 16) | (data8(i+3) << 24);
+	}
+
+	public boolean valid() {
+		return AltosConvert.checksum(eeprom.data, start, length) == 0;
+	}
+
+	private int cmdi() {
+		if (cmd() == AltosLib.AO_LOG_FLIGHT)
+			return 0;
+		return 1;
+	}
+
+	public int compareTo(AltosEepromRecord o) {
+		int	cmd_diff = cmdi() - o.cmdi();
+
+		if (cmd_diff != 0)
+			return cmd_diff;
+
+		int	tick_diff = tick() - o.tick();
+
+		if (tick_diff != 0)
+			return tick_diff;
+		return start - o.start;
+	}
+
+	public void update_state(AltosState state) {
+		if (cmd() == AltosLib.AO_LOG_FLIGHT)
+			state.set_boost_tick(tick());
+		else
+			state.set_tick(tick());
+	}
+
+	public boolean hasNext() {
+		return start + length * 2 < eeprom.data.size();
+	}
+
+	public abstract AltosEepromRecord next();
+
+	public AltosEepromRecord(AltosEepromNew eeprom, int start, int length) {
+		this.eeprom = eeprom;
+		this.start = start;
+		this.length = length;
+	}
+}