Improved sysfs file access code

examples/basic.php

@@ -15,28 +15,16 @@ try {
 $gpio->setMapper( new WiringPiMapper(2) );
 
 // Access logical pin 0, since we got a mapper assigned. Otherwise this would
-// be the actual GPIO0 pin.
+// be the actual GPIO0 pin. 
 $led = $gpio[0]
     ->export()
     ->setDirection("output")
     ->setValue(0)
-    ->setLabel("red led")
     ->dumpStatus(true);
 
-$btn1 = $gpio[1]
-    ->setDirection("input")
-    ->setValue(0)
-    ->setEdge("rising")
-    ->setHandler(function() { echo "INTERRUPT!\n"; })
-    ->setLabel("button 1")
-    ->dumpStatus(true);
-
-$btn2 = $gpio[2]
-    ->setDirection("input")
-    ->setValue(0)
-    ->setEdge("rising")
-    ->setHandler(function() { echo "INTERRUPT!\n"; })
-    ->setLabel("button 2")
-    ->dumpStatus(true);
-
-
+$x = 0;
+while(true) {
+    $x = (int)(!$x);
+    $led->setValue($x);
+    usleep(500000);
+}