103 lines
2.8 KiB
Java
103 lines
2.8 KiB
Java
/*
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* Copyright © 2017 Keith Packard <keithp@keithp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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package org.altusmetrum.altoslib_14;
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import java.io.*;
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import java.util.*;
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import java.text.*;
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public class AltosEepromRecordFireTwo extends AltosEepromRecord {
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public static final int record_length = 32;
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/* AO_LOG_FLIGHT elements */
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public int flight() { return data16(0); }
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/* AO_LOG_STATE elements */
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public int state() { return data16(0); }
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public int reason() { return data16(2); }
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/* AO_LOG_SENSOR elements */
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public int pres() { return data16(0); }
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public int thrust() { return data16(2); }
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public int temp(int i) { return data16(4+i*2); }
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private static final double r_above = 5600.0;
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private static final double r_below = 10000.0;
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private static final double v_adc = 3.3;
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private static double firetwo_adc(int raw) {
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return raw / 4095.0;
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}
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public static double adc_to_pa(int adc) {
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/* raw adc to processor voltage, then back through the
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* voltage divider to the sensor voltage
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*/
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double v = firetwo_adc(adc) * v_adc * (r_above + r_below) / r_below;
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/* Bound to ranges provided in sensor */
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if (v < 0.5) v = 0.5;
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if (v > 4.5) v = 4.5;
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double psi = (v - 0.5) / 4.0 * 2500.0;
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return AltosConvert.psi_to_pa(psi);
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}
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public static double adc_to_n(int adc) {
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double v = firetwo_adc(adc);
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/* this is a total guess */
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return AltosConvert.lb_to_n(v * 298 * 9.807);
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}
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public void provide_data(AltosDataListener listener, AltosCalData cal_data) {
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super.provide_data(listener, cal_data);
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switch (cmd()) {
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case AltosLib.AO_LOG_FLIGHT:
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cal_data.set_flight(flight());
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break;
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case AltosLib.AO_LOG_STATE:
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listener.set_state(state());
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break;
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case AltosLib.AO_LOG_SENSOR:
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listener.set_pressure(adc_to_pa(pres()));
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listener.set_thrust(adc_to_n(thrust()));
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break;
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}
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}
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public AltosEepromRecord next() {
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int s = next_start();
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if (s < 0)
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return null;
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return new AltosEepromRecordFireTwo(eeprom, s);
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}
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public AltosEepromRecordFireTwo(AltosEeprom eeprom, int start) {
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super(eeprom, start, record_length);
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}
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public AltosEepromRecordFireTwo(AltosEeprom eeprom) {
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this(eeprom, 0);
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}
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}
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