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/*
* 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); }
/* 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 * 2500.0;
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(0.0);
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() {
int s = next_start();
if (s < 0)
return null;
return new AltosEepromRecordFireTwo(eeprom, s);
}
public AltosEepromRecordFireTwo(AltosEepromNew eeprom, int start) {
super(eeprom, start, record_length);
}
public AltosEepromRecordFireTwo(AltosEepromNew eeprom) {
this(eeprom, 0);
}
}
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