EnhancedIO Exception Error

[coo]

We are trying to read a potentiometer connected to our Cypress IO board using the enhancedIO class.

Here is our code so far:

package edu.wpi.first.wpilibj.templates;

import edu.wpi.first.wpilibj.IterativeRobot;
import edu.wpi.first.wpilibj.RobotDrive;
import edu.wpi.first.wpilibj.Joystick;
import edu.wpi.first.wpilibj.Encoder;
import edu.wpi.first.wpilibj.AnalogChannel;
import edu.wpi.first.wpilibj.DigitalInput;
import edu.wpi.first.wpilibj.DriverStationEnhancedIO;
import edu.wpi.first.wpilibj.DriverStation;
/**
* The VM is configured to automatically run this class, and to call the
* functions corresponding to each mode, as described in the IterativeRobot
* documentation. If you change the name of this class or the package after
* creating this project, you must also update the manifest file in the resource
* directory.
*/
public class Team503Robot extends IterativeRobot {
private RobotDrive drivetrain;
private Joystick gamepad;
private Encoder leftDriveEncoder;
private Encoder rightDriveEncoder;
private AnalogChannel potentiometer;
private DigitalInput limitSwitch;
DriverStationEnhancedIO dseio;
/**
* This function is run when the robot is first started up and should be
* used for any initialization code.
*/
public void robotInit() {
dseio = DriverStation.getInstance().getEnhancedIO();


}

/**
* This function is called periodically during autonomous
*/
public void autonomousPeriodic() {

}

/**
* This function is called periodically during operator control
*/
public void teleopPeriodic() {
double slider = dseio.getAnalogIn(1);

}

}


We get an "unreported exception edu.wpi.first.wpilibj.DriverStationEnhancedIO.Enha ncedIOException; must be caught or declared to be thrown" error from the "double slider = dseio.getAnalogIn(1); line. Any help would be appreciated.

[bjrussell]

Well, it's been a little while since I did Java, but I would guess that the getAnalogIn function can throw an exception, and it's not being handled. You either need a try block around it or you need to declare that it can throw the exception.

Solution 1 (in method):
try {
double slider = dseio.getAnalogIn(1);
//additional code to execute if that works
}
catch (IOException ioexec) {
//do stuff here if it goes wrong
}
(this last part may or may not be necessary; just know that it will always execute, even if an exception is thrown)
finally {
//more stuff that will always execute
}

Solution 2:
public void teleopPeriodic() throws EnhancedIOException {
double slider = dseio.getAnalogIn(1);
}

Solution 1 has much better control over what happens if an exception is thrown, so I suggest you use that one in your program. I hope it works for you.

[coo]

We tried solution 1 and it worked. Thanks for the help.