Device stubs and exceptions added

lib/Device/Device.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace NoccyLabs\Gpio\Device;
+
+abstract class Device implements GpioAwareInterface
+{
+
+    protected $name;
+
+    protected $gpio;
+
+    protected $pins = array();
+
+    protected function configure()
+    {
+        // call on ->addGpioPin etc here
+    }
+    
+    public function setGpio(Gpio $gpio=null)
+    {
+        $this->gpio = $gpio;
+    }
+    
+    public function getGpio()
+    {
+        return $this->gpio;
+    }
+    
+    public function setName($name)
+    {}
+    
+    public function getName()
+    {}
+    
+    public function setDescription($description)
+    {}
+    
+    public function getDescription()
+    {}
+    
+    public function addGpioPin($gpio, $name, $description=null)
+    {
+        $pin = new GpioPin($gpio);
+        $pin->setLabel($description);
+        $this->pins[$name] = $pin;
+    }
+
+    public function addLogicalPin($logical, $name, $description=null)
+    {
+        $pin = $this->gpio[$logical];
+        $pin->setLabel($description);
+        $this->pins[$name] = $pin;
+    }
+    
+    public function getPins()
+    {
+        return $this->pins;
+    }
+    
+    public function getPin($name)
+    {
+        return $this->pins[$name];
+    }
+    
+    public function delayMillis($ms)
+    {}
+    
+    public function delayMicros($us)
+    {}
+
+    public function __get($pin_name)
+    {
+        return $this->getPin($pin_name);
+    }
+}

lib/Device/Display/Pcd8544Device.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace NoccyLabs\Gpio\Device\Display;
+
+use NoccyLabs\Gpio\Device\Device;
+
+class Pcd8544Device extends Device
+{
+    protected function configure()
+    {
+        $this
+            ->setName("pcd8544")
+            ->setDescription("Philips PCD8544 LCD Display Driver")
+            ->addLogicalPin(0, "dc", "data/command")
+            ->addLogicalPin(1, "sce", "chip select")
+            ->addLogicalPin(2, "scl", "clock")
+            ->addLogicalPin(3, "sda", "data")
+            ->addLogicalPin(9, "bl", "backlight")
+            ;
+    }
+    
+    protected function startup()
+    {
+        
+    }
+    
+    public function setBacklightState($state)
+    {
+        $this->bl->write((int)$state);
+    }
+}