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/*
* Copyright © 2012 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; version 2 of the License.
*
* 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_1;
public class AltosRecordTM extends AltosRecord {
/* Sensor values */
public int accel;
public int pres;
public int temp;
public int batt;
public int drogue;
public int main;
public int ground_accel;
public int ground_pres;
public int accel_plus_g;
public int accel_minus_g;
public int flight_accel;
public int flight_vel;
public int flight_pres;
/*
* Values for our MP3H6115A pressure sensor
*
* From the data sheet:
*
* Pressure range: 15-115 kPa
* Voltage at 115kPa: 2.82
* Output scale: 27mV/kPa
*
*
* 27 mV/kPa * 2047 / 3300 counts/mV = 16.75 counts/kPa
* 2.82V * 2047 / 3.3 counts/V = 1749 counts/115 kPa
*/
static final double counts_per_kPa = 27 * 2047 / 3300;
static final double counts_at_101_3kPa = 1674.0;
static double
barometer_to_pressure(double count)
{
return ((count / 16.0) / 2047.0 + 0.095) / 0.009 * 1000.0;
}
public double pressure() {
if (pres == MISSING)
return MISSING;
return barometer_to_pressure(pres);
}
public double ground_pressure() {
if (ground_pres == MISSING)
return MISSING;
return barometer_to_pressure(ground_pres);
}
public double battery_voltage() {
if (batt == MISSING)
return MISSING;
return AltosConvert.cc_battery_to_voltage(batt);
}
public double main_voltage() {
if (main == MISSING)
return MISSING;
return AltosConvert.cc_ignitor_to_voltage(main);
}
public double drogue_voltage() {
if (drogue == MISSING)
return MISSING;
return AltosConvert.cc_ignitor_to_voltage(drogue);
}
/* Value for the CC1111 built-in temperature sensor
* Output voltage at 0°C = 0.755V
* Coefficient = 0.00247V/°C
* Reference voltage = 1.25V
*
* temp = ((value / 32767) * 1.25 - 0.755) / 0.00247
* = (value - 19791.268) / 32768 * 1.25 / 0.00247
*/
static double
thermometer_to_temperature(double thermo)
{
return (thermo - 19791.268) / 32728.0 * 1.25 / 0.00247;
}
public double temperature() {
if (temp == MISSING)
return MISSING;
return thermometer_to_temperature(temp);
}
double accel_counts_per_mss() {
double counts_per_g = Math.abs(accel_minus_g - accel_plus_g) / 2;
return counts_per_g / 9.80665;
}
public double acceleration() {
if (ground_accel == MISSING || accel == MISSING)
return MISSING;
return (ground_accel - accel) / accel_counts_per_mss();
}
public void copy(AltosRecordTM old) {
super.copy(old);
version = old.version;
callsign = old.callsign;
serial = old.serial;
flight = old.flight;
rssi = old.rssi;
status = old.status;
state = old.state;
tick = old.tick;
accel = old.accel;
pres = old.pres;
temp = old.temp;
batt = old.batt;
drogue = old.drogue;
main = old.main;
flight_accel = old.flight_accel;
ground_accel = old.ground_accel;
flight_vel = old.flight_vel;
flight_pres = old.flight_pres;
ground_pres = old.ground_pres;
accel_plus_g = old.accel_plus_g;
accel_minus_g = old.accel_minus_g;
}
public AltosRecordTM clone() {
return new AltosRecordTM(this);
}
void make_missing() {
accel = MISSING;
pres = MISSING;
temp = MISSING;
batt = MISSING;
drogue = MISSING;
main = MISSING;
flight_accel = MISSING;
flight_vel = MISSING;
flight_pres = MISSING;
ground_accel = MISSING;
ground_pres = MISSING;
accel_plus_g = MISSING;
accel_minus_g = MISSING;
}
public AltosRecordTM(AltosRecord old) {
super.copy(old);
make_missing();
}
public AltosRecordTM(AltosRecordTM old) {
copy(old);
}
public AltosRecordTM() {
super();
make_missing();
}
}
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