Commit | Line | Data |
---|---|---|
38a404b3 KZ |
1 | package org.usfirst.frc.team3501.robot.subsystems; |
2 | ||
3 | import org.usfirst.frc.team3501.robot.Constants; | |
b54ad73b | 4 | import org.usfirst.frc.team3501.robot.Lidar; |
111dc444 | 5 | |
81f3b7db | 6 | import edu.wpi.first.wpilibj.AnalogInput; |
38a404b3 | 7 | import edu.wpi.first.wpilibj.CANTalon; |
111dc444 YN |
8 | import edu.wpi.first.wpilibj.CounterBase.EncodingType; |
9 | import edu.wpi.first.wpilibj.Encoder; | |
b54ad73b | 10 | import edu.wpi.first.wpilibj.I2C; |
d004deee | 11 | import edu.wpi.first.wpilibj.PIDController; |
38a404b3 KZ |
12 | import edu.wpi.first.wpilibj.command.Subsystem; |
13 | ||
14 | public class DriveTrain extends Subsystem { | |
1884c3cf KZ |
15 | // Drivetrain related objects |
16 | private Encoder leftEncoder, rightEncoder; | |
b54ad73b | 17 | public static Lidar lidar; |
d7bf2340 | 18 | private CANTalon frontLeft, frontRight, rearLeft, rearRight; |
d004deee E |
19 | private PIDController frontLeftC, frontRightC, rearLeftC, rearRightC; |
20 | // Drivetrain specific constants that relate to the inches per pulse value for | |
21 | // the encoders | |
22 | private final static double WHEEL_DIAMETER = 6.0; // in inches | |
23 | private final static double PULSES_PER_ROTATION = 256; // in pulses | |
24 | private final static double OUTPUT_SPROCKET_DIAMETER = 2.0; // in inches | |
25 | private final static double WHEEL_SPROCKET_DIAMETER = 3.5; // in inches | |
26 | public final static double INCHES_PER_PULSE = (((Math.PI) | |
27 | * OUTPUT_SPROCKET_DIAMETER / PULSES_PER_ROTATION) | |
28 | / WHEEL_SPROCKET_DIAMETER) * WHEEL_DIAMETER; | |
2c9f5abb | 29 | |
d004deee E |
30 | // Drivetrain specific constants that relate to the PID controllers |
31 | private final static double Kp = 1.0, Ki = 0.0, | |
32 | Kd = 0.0 * (OUTPUT_SPROCKET_DIAMETER / PULSES_PER_ROTATION) | |
33 | / (WHEEL_SPROCKET_DIAMETER) * WHEEL_DIAMETER; | |
d7bf2340 | 34 | |
81f3b7db | 35 | public AnalogInput channel; |
71d73690 | 36 | |
d7bf2340 KZ |
37 | public DriveTrain() { |
38 | frontLeft = new CANTalon(Constants.DriveTrain.FRONT_LEFT); | |
39 | frontRight = new CANTalon(Constants.DriveTrain.FRONT_RIGHT); | |
40 | rearLeft = new CANTalon(Constants.DriveTrain.REAR_LEFT); | |
41 | rearRight = new CANTalon(Constants.DriveTrain.REAR_RIGHT); | |
1884c3cf | 42 | |
b54ad73b | 43 | lidar = new Lidar(I2C.Port.kOnboard); |
d7bf2340 KZ |
44 | leftEncoder = new Encoder(Constants.DriveTrain.ENCODER_LEFT_A, |
45 | Constants.DriveTrain.ENCODER_LEFT_B, false, EncodingType.k4X); | |
46 | rightEncoder = new Encoder(Constants.DriveTrain.ENCODER_RIGHT_A, | |
47 | Constants.DriveTrain.ENCODER_RIGHT_B, false, EncodingType.k4X); | |
45bdf5b9 KZ |
48 | leftEncoder.setDistancePerPulse(Constants.DriveTrain.INCHES_PER_PULSE); |
49 | rightEncoder.setDistancePerPulse(Constants.DriveTrain.INCHES_PER_PULSE); | |
d004deee E |
50 | leftEncoder.setDistancePerPulse(INCHES_PER_PULSE); |
51 | rightEncoder.setDistancePerPulse(INCHES_PER_PULSE); | |
52 | ||
d7bf2340 KZ |
53 | } |
54 | ||
55 | @Override | |
56 | protected void initDefaultCommand() { | |
57 | } | |
58 | ||
59 | public void resetEncoders() { | |
60 | leftEncoder.reset(); | |
61 | rightEncoder.reset(); | |
62 | } | |
63 | ||
b54ad73b KZ |
64 | public double getLidarDistance() { |
65 | return lidar.pidGet(); | |
66 | } | |
67 | ||
d7bf2340 | 68 | public double getRightSpeed() { |
6833a887 | 69 | return rightEncoder.getRate(); // in inches per second |
d7bf2340 KZ |
70 | } |
71 | ||
72 | public double getLeftSpeed() { | |
6833a887 | 73 | return leftEncoder.getRate(); // in inches per second |
d7bf2340 KZ |
74 | } |
75 | ||
76 | public double getSpeed() { | |
6833a887 | 77 | return (getLeftSpeed() + getRightSpeed()) / 2.0; // in inches per second |
d7bf2340 KZ |
78 | } |
79 | ||
d7bf2340 | 80 | public double getRightDistance() { |
6833a887 | 81 | return rightEncoder.getDistance(); // in inches |
d7bf2340 KZ |
82 | } |
83 | ||
d7bf2340 | 84 | public double getLeftDistance() { |
6833a887 | 85 | return leftEncoder.getDistance(); // in inches |
d7bf2340 KZ |
86 | } |
87 | ||
88 | public double getDistance() { | |
6833a887 | 89 | return (getRightDistance() + getLeftDistance()) / 2.0; // in inches |
d7bf2340 KZ |
90 | } |
91 | ||
92 | public void stop() { | |
93 | setMotorSpeeds(0, 0); | |
94 | } | |
95 | ||
96 | public void setMotorSpeeds(double leftSpeed, double rightSpeed) { | |
1884c3cf KZ |
97 | // speed passed to right motor is negative because right motor rotates in |
98 | // opposite direction | |
d7bf2340 KZ |
99 | this.frontLeft.set(leftSpeed); |
100 | this.frontRight.set(-rightSpeed); | |
101 | this.rearLeft.set(leftSpeed); | |
102 | this.rearRight.set(-rightSpeed); | |
d7bf2340 | 103 | } |
38a404b3 | 104 | } |