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);
+}

examples/buttons.php

@@ -0,0 +1,42 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Gpio\Gpio;
+use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
+
+try {
+    $gpio = new Gpio();
+} catch (Gpio\Exception $e) {
+    error_log("Error: {$e}");
+}
+
+// The mapper translates GPIO to logical pins and vice versa
+$gpio->setMapper( new WiringPiMapper(2) );
+
+// Access logical pin 0, since we got a mapper assigned. Otherwise this would
+// be the actual GPIO0 pin.
+$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);
+
+

examples/rf-remote.php

@@ -2,6 +2,21 @@
 
 require_once __DIR__."/../vendor/autoload.php";
 
+/* 
+ * This example demonstrates using a 4-button wireless remote control with the
+ * GPIO, in this case with the pins mapped against WiringPi for a Rev2 board.
+ * If you are using this code with any other hardware, please update the mapper
+ * below.
+ *
+ * It is assumed that Pin 0 is the interrupt pin (VT) to signal when a button
+ * press has been received, and Pin 1-4 are connected to the pins for button
+ * A to D on the remote control.
+ *
+ * Note that the Raspberry Pi GPIO is not 5V tolerant, so use an optoisolator
+ * or transistors to ensure that you don't zap your preciouos hardware.
+ *
+ */
+
 use NoccyLabs\Gpio\Gpio;
 use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
 
@@ -21,7 +36,12 @@ $led = $gpio[0]
     ->setDirection("input")
     ->setEdge("rising")
     ->setHandler(function($e) use($gpio) {
-        
+            if ($gpio[1]->getValue()) { echo "A"; }
+        elseif ($gpio[2]->getValue()) { echo "B"; }
+        elseif ($gpio[3]->getValue()) { echo "C"; }
+        elseif ($gpio[4]->getValue()) { echo "D"; }
+        else { echo "None"; }
+        echo "\n";
     })
     ->setLabel("rfint")
     ->dumpStatus(true);
@@ -33,3 +53,7 @@ for($n = 1; $n < 5; $n++) {
         ->dumpStatus(true);
 }
 
+while(true) {
+    $gpio->refresh();
+    usleep(10000);
+}