Chief Delphi - How to create an On/Off button?

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thecakeisalie

04-02-2013 20:11

How to create an On/Off button?

While reviewing our shooter code, I figured that the ability to be able to toggle our shooter wheels on/off would be a nice feature to have. However, no matter how hard I tried, I simply could not figure out a way to do this.
The only method that I was able to call upon was just joystickButton.get() since we are using Iterative robot this year.
If it is possible to create an On/Off button, how would it be done?

Team3266Spencer

04-02-2013 22:24

Re: How to create an On/Off button?

An On/Off button on the dashboard or on your joystick?

thecakeisalie

04-02-2013 22:43

Re: How to create an On/Off button?

On the joystick. I would prefer a more physical button. :)

Team3266Spencer

04-02-2013 22:55

Re: How to create an On/Off button?

The easiest way would be to save the state as on or off in a boolean or byte variable and then switch it every time the button is pressed.

Pseudo-Code:

Code:

if joystick button pressed then

    if lightsAreOn is true then

        //so some stuff

        set lightsAreOn to false

    else

        //do some stuff

        set lightsAreOn to true

thecakeisalie

05-02-2013 17:48

Re: How to create an On/Off button?

That won't work since teleop loops every 20ms, which means one press will equal a lot of Joystick.get()'s.

gixxy

05-02-2013 18:25

Re: How to create an On/Off button?

Use the Timer to limit how quickly you can toggle.

Code:

double interim = 2; //can only toggle every 2 seconds

double previous = 0;



boolean isOn = false; //state of motors



if(JoystickButton.get()) {

  /*check if interim time has passed since previous check*/

  if(Timer.getFPGATimestamp() - previous >= interim) {

    previous == Timer.getFPGATimestamp();

    if(isOn == true) {

      //change state of motors

      isOn = false;

    } else {

      //change state of motors

      isOn = true;

    }

  }

}

Ether

05-02-2013 18:38

Re: How to create an On/Off button?

Code:

button1 = GetButton(button1);

if (button1 && ! button1previous) toggle1 = !toggle1;

button1previous = button1;

initialize toggle1 to zero.

thecakeisalie

05-02-2013 20:03

Re: How to create an On/Off button?

Quote:

Originally Posted by Ether (Post 1228319)

Code:

button1 = GetButton(button1);

if (button1 && ! button1previous) toggle1 = !toggle1;

button1previous = button1;

initialize toggle1 to zero.

Thank you. This is exactly what I was looking for but couldn't write myself :P
I assume that if you wanted to start with the motors running, I would initialize toggle as true?

Ether

05-02-2013 20:05

Re: How to create an On/Off button?

Quote:

Originally Posted by thecakeisalie (Post 1228376)

Thank you. This is exactly what I was looking for but couldn't write myself :P
I assume that if you wanted to start with the motors running, I would initialize toggle as true?

Yes. Either that or run the motors when it's false:)

Team3266Spencer

05-02-2013 20:50

Re: How to create an On/Off button?

Quote:

Originally Posted by thecakeisalie (Post 1228285)

That won't work since teleop loops every 20ms, which means one press will equal a lot of Joystick.get()'s.

Not if your using the command-based template.

Arhowk

07-02-2013 15:50

Re: How to create an On/Off button?

This is code that I wrote and use. Just make all of your buttons AdvancedButton and call

button#.togglePressed(yourCommand);

some variables are protected so that they cant be accessed but u can still extend the class and make your own addition

code

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