altoslib: Add new eeprom management code

[fw/altos] / altoslib / AltosEepromRecord.java

diff --git a/altoslib/AltosEepromRecord.java b/altoslib/AltosEepromRecord.java
new file mode 100644 (file)
index 0000000..efcca85
--- /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;
+       }
+}