Using the LabVIEW Dashboard with C++/Java Code

The default LabVIEW Dashboard utilizes NetworkTables to pass values and is therefore compatible with C++ and Java robot programs. This article covers the keys and value ranges to use to work with the Dashboard.

Drive Tab

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The Select Autonomous… dropdown can be used so show the available autonomous routines and choose one to run for the match.

SmartDashboard.putStringArray("Auto List", {"Drive Forwards", "Drive Backwards", "Shoot"});

// At the beginning of auto
String autoName = SmartDashboard.getString("Auto Selector", "Drive Forwards") // This would make "Drive Forwards the default auto
switch(autoName) {
   case "Drive Forwards":
     // auto here
   case "Drive Backwards":
     // auto here
   case "Shoot":
     // auto here
}

Sending to the «Gyro» NetworkTables entry will populate the gyro here.

SmartDashboard.putNumber("Gyro", drivetrain.getHeading());

There are four outputs that show the motor power to the drivetrain. This is configured for 2 motors per side and a tank style drivetrain. This is done by setting «RobotDrive Motors» like the example below.

SmartDashboard.putNumberArray("RobotDrive Motors", {drivetrain.getLeftFront(), drivetrain.getRightFront(), drivetrain.getLeftBack(), drivetrain.getRightBack()});

Basic Tab

../../../../_images/basic-tab.png

The Basic tab uses a number of keys in the a «DB» sub-table to send/receive Dashboard data. The LED’s are output only, the other fields are all bi-directional (send or receive).

Strings

../../../../_images/strings.png

The strings are labeled top-to-bottom, left-to-right from «DB/String 0» to «DB/String 9». Each String field can display at least 21 characters (exact number depends on what characters). To write to these strings:

SmartDashboard.putString("DB/String 0", "My 21 Char TestString");

To read string data entered on the Dashboard:

String dashData = SmartDashboard.getString("DB/String 0", "myDefaultData");

Buttons and LEDs

../../../../_images/buttons-and-leds.png

The Buttons and LEDs are boolean values and are labeled top-to-bottom from «DB/Button 0» to «DB/Button 3» and «DB/LED 0» to «DB/LED 3». The Buttons are bi-directional, the LEDs are only able to be written from the Robot and read on the Dashboard. To write to the Buttons or LEDs:

SmartDashboard.putBoolean("DB/Button 0", true);

To read from the Buttons: (default value is false)

boolean buttonValue = SmartDashboard.getBoolean("DB/Button 0", false);

Sliders

../../../../_images/sliders.png

The Sliders are bi-directional analog (double) controls/indicators with a range from 0 to 5. To write to these indicators:

SmartDashboard.putNumber("DB/Slider 0", 2.58);

To read values from the Dashboard into the robot program: (default value of 0.0)

double dashData = SmartDashboard.getNumber("DB/Slider 0", 0.0);