package org.usfirst.frc.team3501.robot.subsystems;
import org.usfirst.frc.team3501.robot.Constants;
-import edu.wpi.first.wpilibj.CANTalon;
+import org.usfirst.frc.team3501.robot.commands.driving.JoystickDrive;
+
+import com.ctre.CANTalon;
+
+import edu.wpi.first.wpilibj.Encoder;
+import edu.wpi.first.wpilibj.RobotDrive;
import edu.wpi.first.wpilibj.command.Subsystem;
public class DriveTrain extends Subsystem {
+ public static final double WHEEL_DIAMETER = 6; // inches
+ public static final int ENCODER_PULSES_PER_REVOLUTION = 256;
+ public static final double INCHES_PER_PULSE = WHEEL_DIAMETER * Math.PI
+ / ENCODER_PULSES_PER_REVOLUTION;
+
private static DriveTrain driveTrain;
- private CANTalon frontLeft, frontRight, rearLeft, rearRight;
+ private final CANTalon frontLeft, frontRight, rearLeft, rearRight;
+ private final RobotDrive robotDrive;
+ private final Encoder leftEncoder, rightEncoder;
private DriveTrain() {
+ // MOTOR CONTROLLERS
frontLeft = new CANTalon(Constants.DriveTrain.FRONT_LEFT);
frontRight = new CANTalon(Constants.DriveTrain.FRONT_RIGHT);
rearLeft = new CANTalon(Constants.DriveTrain.REAR_LEFT);
rearRight = new CANTalon(Constants.DriveTrain.REAR_RIGHT);
+
+ // ENCODERS
+ leftEncoder = new Encoder(Constants.DriveTrain.ENCODER_LEFT_A,
+ Constants.DriveTrain.ENCODER_LEFT_B);
+ rightEncoder = new Encoder(Constants.DriveTrain.ENCODER_RIGHT_A,
+ Constants.DriveTrain.ENCODER_RIGHT_B);
+
+ leftEncoder.setDistancePerPulse(INCHES_PER_PULSE);
+ rightEncoder.setDistancePerPulse(INCHES_PER_PULSE);
+
+ // ROBOT DRIVE
+ robotDrive = new RobotDrive(frontLeft, rearLeft, frontRight, rearRight);
+ }
+
+ public static DriveTrain getDriveTrain() {
+ if (driveTrain == null) {
+ driveTrain = new DriveTrain();
+ }
+ return driveTrain;
+ }
+
+ // DRIVE METHODS
+ public void setMotorValues(final double left, final double right) {
+ frontLeft.set(left);
+ rearLeft.set(left);
+
+ frontRight.set(-right);
+ rearRight.set(-right);
+ }
+
+ public void joystickDrive(final double thrust, final double twist) {
+ robotDrive.arcadeDrive(thrust, twist, true);
+ }
+
+ public void stop() {
+ setMotorValues(0, 0);
+ }
+
+ public double getFrontLeftMotorVal() {
+ return frontLeft.get();
+ }
+
+ public double getFrontRightMotorVal() {
+ return frontRight.get();
+ }
+
+ public double getRearLeftMotorVal() {
+ return frontLeft.get();
+ }
+
+ public double getRearRightMotorVal() {
+ return frontLeft.get();
}
-
- public static DriveTrain getDriveTrain(){
- if(driveTrain == null)
- driveTrain = new DriveTrain();
- return driveTrain;
+
+ public CANTalon getFrontLeft() {
+ return frontLeft;
+ }
+
+ public CANTalon getFrontRight() {
+ return frontRight;
+ }
+
+ public CANTalon getRearLeft() {
+ return rearLeft;
+ }
+
+ public CANTalon getRearRight() {
+ return rearRight;
+ }
+
+ // ENCODER METHODS
+
+ public double getLeftEncoder() {
+ return leftEncoder.getDistance();
+ }
+
+ public double getRightEncoder() {
+ return rightEncoder.getDistance();
+ }
+
+ public double getAvgEncoderDistance() {
+ return (leftEncoder.getDistance() + rightEncoder.getDistance()) / 2;
+ }
+
+ public void resetEncoders() {
+ leftEncoder.reset();
+ rightEncoder.reset();
+ }
+
+ public double getLeftSpeed() {
+ return leftEncoder.getRate();
+ }
+
+ public double getRightSpeed() {
+ return rightEncoder.getRate();
+ }
+
+ public double getSpeed() {
+ return (getLeftSpeed() + getRightSpeed()) / 2.0;
}
@Override
protected void initDefaultCommand() {
+ setDefaultCommand(new JoystickDrive());
}
}