Fixed typos, added pinmap example to dump map

examples/bitmap.php

@@ -17,12 +17,20 @@ $gpio->setMapper( new WiringPiMapper(2) );
 
 $par = new BitmappedGpio();
 for($n = 0; $n < 7; $n++) {
-    $par->setGpioPin($n,$gpio[$n]);
+	$pin = $gpio[$n]->setDirection("out");
+    $par->setGpioPin($n,$pin);
 }
 
-for($n = 0; $n < 10; $n++) {
+for($n = 0; $n < 5; $n++) {
 	$par->write(0xFF);
-	usleep(500000);
+	usleep(300000);
 	$par->write(0x00);
+	usleep(300000);
+}
+
+for($n = 1; $n < 16; $n++) {
+	$par->write($n);
 	usleep(500000);
 }
+
+$par->write(0);

examples/pinmap.php

@@ -0,0 +1,17 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
+use NoccyLabs\Gpio\Exception\GpioException;
+
+$mapper = new WiringPiMapper(2);
+
+$pin = 0;
+try {
+	while (($gpio = $mapper->mapLogicalToGpioPin($pin))) {
+		printf(" %3d = GPIO%d \n", $pin, $gpio);
+		$pin++;
+	}
+} catch (GpioException $e) {
+}

lib/GpioMapper/WiringPiMapper.php

@@ -20,6 +20,7 @@
 namespace NoccyLabs\Gpio\GpioMapper;
 
 use NoccyLabs\Gpio\GpioMapperInterface;
+use NoccyLabs\Gpio\Exception\GpioException;
 
 class WiringPiMapper implements GpioMapperInterface
 {
@@ -107,7 +108,7 @@ class WiringPiMapper implements GpioMapperInterface
             case 19:    return 30;
             case 20:    return 31;
         }
-        throw new GpioException("Unable to map logicak {$logical} to GPIO pin");
+        throw new GpioException("Unable to map logical pin {$logical} to GPIO pin");
     }
 
 }