A Basic Phidget Program

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11 . A Basic Phidget Program

Putting all this information together may seem a bit daunting at first, but the end result can actually be quite simple.

For example, the following program will read the state of a button for a time, as seen in the flowchart to the right:

from Phidget22.PhidgetException import *
from Phidget22.Phidget import *
from Phidget22.Devices.DigitalInput import *
import time

def onAttachHandler(self):
    print("Phidget Attached!")

def onStateChangeHandler(self, state):
    print("State %f" % state)

def main():
    ch = DigitalInput()

    #Set Any Addressing Parameters Here

    ch.setOnAttachHandler(onAttachHandler)
    ch.setOnStateChangeHandler(onStateChangeHandler)

    ch.openWaitForAttachment(5000)

    # Do stuff with your Phidgets here.
    time.sleep(10)

    ch.close()

main()

import com.phidget22.*;

public class DigitalInputExample {
   
   private static DigitalInput ch = null; 

   public static AttachListener onAttach = new AttachListener() {
      @Override
      public void onAttach(AttachEvent e) {
         System.out.print("Phidget Attached!\n");
      }
   };
   
   public static DigitalInputStateChangeListener onStateChange =
      new DigitalInputStateChangeListener() {
      @Override
      public void onStateChange(DigitalInputStateChangeEvent e) {
         System.out.println("State: " + e.getState());
      }
   };
   
   public static void main(String[] args) throws Exception {
      try {
         ch = new DigitalInput();

         //Set Any Addressing Parameters Here

         ch.addAttachListener(onAttach);
         ch.addStateChangeListener(onStateChange);
         
         ch.open(5000);
         
         Thread.sleep(10000);

         ch.close();
         return;
         
      } catch (PhidgetException ex) {
         System.out.println(ex.getDescription());
      }
   }
}

using System;
using Phidget22;
using Phidget22.Events;

namespace ConsoleApplication
{
    class Program
    {
        private static DigitalInput ch = null;

        private static void onAttach(object sender,
                                     AttachEventArgs e)
        {
            Console.WriteLine("Phidget Attached!");
        }

        private static void onStateChange(object sender,
                              DigitalInputStateChangeEventArgs e)
        {
            Console.WriteLine("State: " + e.State);
        }

        static void Main(string[] args)
        {
            ch = new DigitalInput();

            //Set Any Addressing Parameters Here

            ch.Attach += onAttach;
            ch.StateChange += onStateChange;

            ch.Open(5000);
            
            System.Threading.Thread.Sleep(10000);
            
            ch.Close();
        }
    }
}

#include <phidget22.h>
#include <stdio.h>

static void CCONV onAttachHandler(PhidgetHandle ph, void *ctx) {
    printf("Phidget Attached!\n");
}

static void CCONV onStateChangeHandler(PhidgetDigitalInputHandle ph,
                                       void *ctx, int state) {
    printf("State: %d\n", state);
}

int main() {
    PhidgetDigitalInputHandle ch;
    PhidgetDigitalInput_create(&ch);

    //Set Any Addressing Parameters Here

    Phidget_setOnAttachHandler((PhidgetHandle)ch,
                                onAttachHandler, NULL);
    PhidgetDigitalInput_setOnStateChangeHandler(ch,
                                onStateChangeHandler, NULL);

    Phidget_openWaitForAttachment((PhidgetHandle)ch, 5000);

    //Do stuff with your Phidgets here.
    getchar(); //Wait until ENTER is pressed

    Phidget_close((PhidgetHandle)ch);
    PhidgetDigitalInput_delete(&ch);
}


Simple Phidget Program Flowchart.png

Click Flowchart to Enlarge