challenge-bot.com Git - 3501/2017steamworks/blob - src/org/usfirst/frc/team3501/robot/commands/driving/DriveDistance.java

   1 package org.usfirst.frc.team3501.robot.commands.driving;
   2
   3 import org.usfirst.frc.team3501.robot.Robot;
   4 import org.usfirst.frc.team3501.robot.subsystems.DriveTrain;
   5 import org.usfirst.frc.team3501.robot.utils.PIDController;
   6
   7 import edu.wpi.first.wpilibj.Preferences;
   8 import edu.wpi.first.wpilibj.command.Command;
   9
  10 /**
  11  * This command makes the robot drive a specified distance using encoders on the
  12  * robot and using a feedback loop
  13  *
  14  * parameters: distance the robot will move in inches motorVal: the motor input
  15  * to set the motors to
  16  */
  17 public class DriveDistance extends Command {
  18   private DriveTrain driveTrain = Robot.getDriveTrain();
  19   private double maxTimeOut;
  20   private double target;
  21   private double zeroAngle;
  22   private Preferences prefs;
  23   private PIDController driveController;
  24
  25   private double gyroP;
  26
  27   public DriveDistance(double distance, double maxTimeOut) {
  28     requires(driveTrain);
  29     this.maxTimeOut = maxTimeOut;
  30     this.target = distance;
  31
  32     this.driveController = driveTrain.getDriveController();
  33     this.driveController.setDoneRange(0.5);
  34     this.driveController.setMaxOutput(1.0);
  35     this.driveController.setMinDoneCycles(5);
  36   }
  37
  38   @Override
  39   protected void initialize() {
  40     this.driveTrain.resetEncoders();
  41     this.driveController.setSetPoint(this.target);
  42     this.zeroAngle = driveTrain.getAngle();
  43   }
  44
  45   @Override
  46   protected void execute() {
  47     double xVal = gyroP * (driveTrain.getAngle() - zeroAngle);
  48     double yVal = driveController.calcPID(driveTrain.getAvgEncoderDistance());
  49
  50     double leftDrive = yVal - xVal;
  51     double rightDrive = yVal + xVal;
  52     this.driveTrain.setMotorValues(leftDrive, rightDrive);
  53   }
  54
  55   @Override
  56   protected boolean isFinished() {
  57     return timeSinceInitialized() >= maxTimeOut
  58         || this.driveController.isDone();
  59   }
  60
  61   @Override
  62   protected void end() {
  63   }
  64
  65   @Override
  66   protected void interrupted() {
  67     end();
  68   }
  69 }