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SensorMRCompass.java
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SensorMRCompass.java
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/* Copyright (c) 2017 FIRST. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted (subject to the limitations in the disclaimer below) provided that
* the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* Neither the name of FIRST nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written permission.
*
* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS
* LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.firstinspires.ftc.robotcontroller.external.samples;
import com.qualcomm.hardware.modernrobotics.ModernRoboticsI2cCompassSensor;
import com.qualcomm.robotcore.eventloop.opmode.Disabled;
import com.qualcomm.robotcore.eventloop.opmode.LinearOpMode;
import com.qualcomm.robotcore.eventloop.opmode.TeleOp;
import com.qualcomm.robotcore.hardware.CompassSensor;
import com.qualcomm.robotcore.util.ElapsedTime;
import org.firstinspires.ftc.robotcore.external.navigation.Acceleration;
/**
* The {@link SensorMRCompass} op mode provides a demonstration of the
* functionality provided by the Modern Robotics compass sensor.
*
* The op mode assumes that the MR compass is configured with a name of "compass".
*
* Use Android Studio to Copy this Class, and Paste it into your team's code folder with a new name.
* Remove or comment out the @Disabled line to add this opmode to the Driver Station OpMode list
*
* @see <a href="http://www.modernroboticsinc.com/compass">MR Compass Sensor</a>
*/
@TeleOp(name = "Sensor: MR compass", group = "Sensor")
@Disabled // comment out or remove this line to enable this opmode
public class SensorMRCompass extends LinearOpMode {
ModernRoboticsI2cCompassSensor compass;
ElapsedTime timer = new ElapsedTime();
@Override public void runOpMode() {
// get a reference to our compass
compass = hardwareMap.get(ModernRoboticsI2cCompassSensor.class, "compass");
telemetry.log().setCapacity(20);
telemetry.log().add("The compass sensor operates quite well out-of-the");
telemetry.log().add("box, as shipped by the manufacturer. Precision can");
telemetry.log().add("however be somewhat improved with calibration.");
telemetry.log().add("");
telemetry.log().add("To calibrate the compass once the opmode is");
telemetry.log().add("started, make sure the compass is level, then");
telemetry.log().add("press 'A' on the gamepad. Next, slowly rotate the ");
telemetry.log().add("compass in a full 360 degree circle while keeping");
telemetry.log().add("it level. When complete, press 'B'.");
// wait for the start button to be pressed
waitForStart();
telemetry.log().clear();
while (opModeIsActive()) {
// If the A button is pressed, start calibration and wait for the A button to rise
if (gamepad1.a && !compass.isCalibrating()) {
telemetry.log().clear();
telemetry.log().add("Calibration started");
telemetry.log().add("Slowly rotate compass 360deg");
telemetry.log().add("Press 'B' when complete");
compass.setMode(CompassSensor.CompassMode.CALIBRATION_MODE);
timer.reset();
while (gamepad1.a && opModeIsActive()) {
doTelemetry();
idle();
}
}
// If the B button is pressed, stop calibration and wait for the B button to rise
if (gamepad1.b && compass.isCalibrating()) {
telemetry.log().clear();
telemetry.log().add("Calibration complete");
compass.setMode(CompassSensor.CompassMode.MEASUREMENT_MODE);
if (compass.calibrationFailed()) {
telemetry.log().add("Calibration failed");
compass.writeCommand(ModernRoboticsI2cCompassSensor.Command.NORMAL);
}
while (gamepad1.a && opModeIsActive()) {
doTelemetry();
idle();
}
}
doTelemetry();
}
}
protected void doTelemetry() {
if (compass.isCalibrating()) {
telemetry.addData("compass", "calibrating %s", Math.round(timer.seconds())%2==0 ? "|.." : "..|");
} else {
// getDirection() returns a traditional compass heading in the range [0,360),
// with values increasing in a CW direction
telemetry.addData("heading", "%.1f", compass.getDirection());
// getAcceleration() returns the current 3D acceleration experienced by
// the sensor. This is used internally to the sensor to compute its tilt and thence
// to correct the magnetometer reading to produce tilt-corrected values in getDirection()
Acceleration accel = compass.getAcceleration();
double accelMagnitude = Math.sqrt(accel.xAccel*accel.xAccel + accel.yAccel*accel.yAccel + accel.zAccel*accel.zAccel);
telemetry.addData("accel", accel);
telemetry.addData("accel magnitude", "%.3f", accelMagnitude);
// getMagneticFlux returns the 3D magnetic field flux experienced by the sensor
telemetry.addData("mag flux", compass.getMagneticFlux());
}
// the command register provides status data
telemetry.addData("command", "%s", compass.readCommand());
telemetry.update();
}
}