package com.grt192.sensor;
import com.grt192.core.Sensor;
import com.grt192.event.component.ADXL345Event;
import com.grt192.event.component.ADXL345Listener;
import edu.wpi.first.wpilibj.ADXL345DigitalAccelerometer;
import java.util.Vector;
/**
* 3 axis digital accelerometer from Analog Devices.
* Uses i2c bus
* @author anand
*/
public class GRTADXL345 extends Sensor {
public static final double SPIKE_THRESHOLD = 1.0;
public static final double CHANGE_THRESHOLD = .001;
private ADXL345DigitalAccelerometer accel;
private int range;
private Vector accelerometerListeners;
public GRTADXL345(int slot, int range, int polltime, String id) {
this.range = range;
accel = new ADXL345DigitalAccelerometer(slot);
accel.intitialize();
setRange(range);
setState("X", 0.0);
setState("Y", 0.0);
setState("Z", 0.0);
this.sleepTime = polltime;
this.id = id;
}
public void poll() {
double previousValue = getState("X");
setState("X", accel.getXAxis());
if (Math.abs(getState("X") - previousValue) >= SPIKE_THRESHOLD) {
notifyAccelerometerSpike(ADXL345Event.X, getState("X"));
}
if (Math.abs(getState("X") - previousValue) >= CHANGE_THRESHOLD) {
notifyAccelerometerChange(ADXL345Event.X, getState("X"));
}
notifyADXL345Listeners(ADXL345Event.X, getState("X"));
previousValue = getState("Y");
setState("Y", accel.getYAxis());
if (Math.abs(getState("Y") - previousValue) >= SPIKE_THRESHOLD) {
notifyAccelerometerSpike(ADXL345Event.Y, getState("Y"));
}
if (Math.abs(getState("Y") - previousValue) >= CHANGE_THRESHOLD) {
notifyAccelerometerChange(ADXL345Event.Y, getState("Y"));
}
notifyADXL345Listeners(ADXL345Event.Y, getState("Y"));
previousValue = getState("Z");
setState("Z", accel.getZAxis());
if (Math.abs(getState("Z") - previousValue) >= SPIKE_THRESHOLD) {
notifyAccelerometerSpike(ADXL345Event.Z, getState("Z"));
}
if (Math.abs(getState("Z") - previousValue) >= CHANGE_THRESHOLD) {
notifyAccelerometerChange(ADXL345Event.Z, getState("Z"));
}
notifyADXL345Listeners(ADXL345Event.Z, getState("Z"));
}
public int getRange() {
return range;
}
public void setRange(int range) {
this.range = range;
switch (range) {
case 2:
accel.setRange(ADXL345DigitalAccelerometer.DATA_FORMAT_02G);
break;
case 4:
accel.setRange(ADXL345DigitalAccelerometer.DATA_FORMAT_04G);
break;
case 8:
accel.setRange(ADXL345DigitalAccelerometer.DATA_FORMAT_08G);
break;
case 16:
accel.setRange(ADXL345DigitalAccelerometer.DATA_FORMAT_16G);
break;
default:
accel.setRange(ADXL345DigitalAccelerometer.DATA_FORMAT_02G);
}
}
protected void notifyAccelerometerSpike(int axis, double value) {
for (int i = 0; i < accelerometerListeners.size(); i++) {
((ADXL345Listener) accelerometerListeners.elementAt(i)).didAccelerationSpike(
new ADXL345Event(this,
axis,
value));
}
}
protected void notifyAccelerometerChange(int axis, double value) {
for (int i = 0; i < accelerometerListeners.size(); i++) {
((ADXL345Listener) accelerometerListeners.elementAt(i)).didAccelerationChange(
new ADXL345Event(this,
axis,
value));
}
}
protected void notifyADXL345Listeners(int axis, double value) {
for (int i = 0; i < accelerometerListeners.size(); i++) {
((ADXL345Listener) accelerometerListeners.elementAt(i)).didReceiveAcceleration(
new ADXL345Event(this,
axis,
value));
}
}
public Vector getADXL345Listeners() {
return accelerometerListeners;
}
public void addADXL345Listener(ADXL345Listener a) {
accelerometerListeners.addElement(a);
}
public void removeADXL345Listener(ADXL345Listener a) {
accelerometerListeners.removeElement(a);
}
}