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, 105 insertions, 0 deletions

diff --git a/altoslib/AltosEepromRecordFireTwo.java b/altoslib/AltosEepromRecordFireTwo.java
new file mode 100644
index 00000000..9b92f111
--- /dev/null
+++ b/altoslib/AltosEepromRecordFireTwo.java
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ *
+ * 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_11;
+
+import java.io.*;
+import java.util.*;
+import java.text.*;
+
+public class AltosEepromRecordFireTwo extends AltosEepromRecord {
+	public static final int	record_length = 32;
+
+	/* AO_LOG_FLIGHT elements */
+	public int flight() { return data16(0); }
+	public int idle_pres() { return data16(2); }
+	public int idle_thrust() { return data16(4); }
+
+	/* AO_LOG_STATE elements */
+	public int state() { return data16(0); }
+	public int reason() { return data16(2); }
+
+	/* AO_LOG_SENSOR elements */
+	public int pres() { return data16(0); }
+	public int thrust() { return data16(2); }
+	public int temp(int i) { return data16(4+i*2); }
+
+	private static final double r_above = 5600.0;
+	private static final double r_below = 10000.0;
+	private static final double v_adc = 3.3;
+
+	private static double firetwo_adc(int raw) {
+		return raw / 4095.0;
+	}
+
+	public static double adc_to_pa(int adc) {
+
+		/* raw adc to processor voltage, then back through the
+		 * voltage divider to the sensor voltage
+		 */
+
+		double	v = firetwo_adc(adc) * v_adc * (r_above + r_below) / r_below;
+
+		/* Bound to ranges provided in sensor */
+		if (v < 0.5) v = 0.5;
+		if (v > 4.5) v = 4.5;
+
+		double	psi = (v - 0.5) / 4.0 * 1600.0;
+		return AltosConvert.psi_to_pa(psi);
+	}
+
+	public static double adc_to_n(int adc) {
+		double v = firetwo_adc(adc);
+
+		/* this is a total guess */
+		return AltosConvert.lb_to_n(v * 298 * 9.807);
+	}
+
+	public void update_state(AltosState state) {
+		super.update_state(state);
+
+		switch (cmd()) {
+		case AltosLib.AO_LOG_FLIGHT:
+			state.set_flight(flight());
+			state.set_ground_pressure(adc_to_pa(idle_pres()));
+			state.set_accel_g(0, -1);
+			break;
+		case AltosLib.AO_LOG_STATE:
+			state.set_state(state());
+			break;
+		case AltosLib.AO_LOG_SENSOR:
+			state.set_pressure(adc_to_pa(pres()));
+			state.set_accel(adc_to_n(thrust()));
+			break;
+		}
+	}
+
+	public AltosEepromRecord next() {
+		if (start + length + length < eeprom.data.size())
+			return new AltosEepromRecordFireTwo(eeprom, start + length);
+		return null;
+	}
+
+	public AltosEepromRecordFireTwo(AltosEepromNew eeprom, int start) {
+		super(eeprom, start, record_length);
+	}
+
+	public AltosEepromRecordFireTwo(AltosEepromNew eeprom) {
+		this(eeprom, 0);
+	}
+}