A Basic Phidget Program

 Phidget Programming Basics: A Basic Phidget Program Table of Contents

10. Using Events12. Using Multiple Phidgets

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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:

PythonJavaC#CJavaScript (Node.js) 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); } const phidget22 = require('phidget22'); async function runExample() { const conn = new phidget22.NetworkConnection(5661, 'localhost') await conn.connect() const ch = new phidget22.DigitalInput() // Set any addressing parameters here ch.onAttach = function(ch) { console.log('Phidget Attached!') } ch.onStateChange = function(state) { console.log('State: ' + state) } await ch.open(5000) // Do stuff with your Phidgets here setTimeout(function() { await ch.close() process.exit(1) },10000); } runExample()

Click Flowchart to Enlarge

10. Using Events 12. Using Multiple Phidgets