Implemented base of GpioMapperInterface with WiringPiMapper

composer.json

@@ -9,6 +9,11 @@
         }
     ],
     "require": {
-
+        "noccylabs/sansi": "dev-master"
+    },
+    "autoload": {
+        "psr-4": {
+            "NoccyLabs\\Gpio\\": "lib/"
+        }
     }
 }

composer.lock

@@ -0,0 +1,51 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file"
+    ],
+    "hash": "6ede4cbc5ab4ef05b58811c306b5376f",
+    "packages": [
+        {
+            "name": "noccylabs/sansi",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "http://satis.noccylabs.info/packages/php-sansi.git",
+                "reference": "9e347698a898dc966802987fc4fbfa7bec7225b0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "NoccyLabs\\Sansi\\": "lib/"
+                }
+            },
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Christopher Vagnetoft",
+                    "email": "cvagnetoft@gmail.com"
+                }
+            ],
+            "description": "Simple ANSI User Interface",
+            "time": "2014-06-05 12:10:14"
+        }
+    ],
+    "packages-dev": [
+
+    ],
+    "aliases": [
+
+    ],
+    "minimum-stability": "stable",
+    "stability-flags": {
+        "noccylabs/sansi": 20
+    },
+    "platform": [
+
+    ],
+    "platform-dev": [
+
+    ]
+}

examples/basic.php

@@ -2,21 +2,41 @@
 
 require_once __DIR__."/../vendor/autoload.php";
 
-use NoccyLabs\Linux\Gpio;
+use NoccyLabs\Gpio\Gpio;
+use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
 
 try {
-    $gpio = new Gpio\Gpio();
+    $gpio = new Gpio();
 } catch (Gpio\Exception $e) {
     error_log("Error: {$e}");
 }
 
-$pin = $gpio->export(0);
-$pin->setInterrupt("rising", function() {
-    echo "Interrupt on GPIO0\n";
-});
+// 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 = $gpio[0]
+    ->export()
+    ->setDirection("output")
+    ->setValue(0)
+    ->setLabel("red led")
+    ->dumpStatus(true);
+
+$btn = $gpio[1]
+    ->setDirection("input")
+    ->setValue(0)
+    ->setEdge("rising")
+    ->setHandler(function() { echo "INTERRUPT!\n"; })
+    ->setLabel("button 1")
+    ->dumpStatus(true);
+
+$gpio[2]
+    ->setDirection("input")
+    ->setValue(0)
+    ->setEdge("rising")
+    ->setHandler(function() { echo "INTERRUPT!\n"; })
+    ->setLabel("button 2")
+    ->dumpStatus(true);
+
 
-while(true) {
-    // We need to call this for our interrupt status to be polled
-    $gpio->update();
-    usleep(10000);
-}

lib/Gpio.php

@@ -1,38 +1,72 @@
 <?php
 
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
 namespace NoccyLabs\Gpio;
 
-class Gpio
+class Gpio implements \ArrayAccess
 {
-    public function __construct()
-    {}
+    protected $gpio = array();
     
-    // call export before getpin    
-    public function getPin($pinno)
-    {}
+    /** @var NoccyLabs\Gpio\GpioMapperInterface */
+    protected $mapper;
 
-    // export the pin
-    public function exportPin($pinno)
-    {}
+    public function refresh()
+    {
+        $read = $this->fd_gpio;
+        $write = array();
+        $except = $read;
+        select($read, $write, $except, 0);
+        foreach($except as $fd) {
+            $pin = $this->getPinFromFd($fd);
+            $pin->doInterrupt();
         
-    // unexport the pin
-    public function unexportPin($pinno)
-    {}
+        }
     
-    // set handler, pass null to disable interrupts
-    public function setInterruptHandler(GpioPin $pin, callable $handler=null)
-    {}
+    }
     
-    // get the interrupt handler for the pin
-    public function getInterruptHandler(GpioPin $pin)
-    {}
+    public function setMapper(GpioMapperInterface $mapper=null)
+    {
+        $this->mapper = $mapper;
+        return $this;
+    }
     
-    // set edge
-    public function setInterruptEdge(GpioPin $pin, $edge)
-    {}
+    public function offsetGet($index)
+    {
+        if ($this->mapper) { $index = $this->mapper->mapLogicalToGpioPin($index); }
+        if (empty($this->gpio[$index])) {
+            $this->gpio[$index] = new GpioPin($index);
+        }
+        return $this->gpio[$index];
+    }
     
-    // get edge
-    public function getInterruptEdge(GpioPin $pin)
-    {}
+    public function offsetExists($index)
+    {
+        return array_key_exists($index, $this->gpio);
+    }
+    
+
+    public function offsetSet($index,$value)
+    {   throw new \Exception(); }
+    
+    public function offsetUnset($index)
+    {   
+        unset($this->gpio[$index]);
+    }
     
 }

lib/GpioMapper/WiringPiMapper.php

@@ -0,0 +1,86 @@
+<?php
+
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace NoccyLabs\Gpio\GpioMapper;
+
+use NoccyLabs\Gpio\GpioMapperInterface;
+
+class WiringPiMapper implements GpioMapperInterface
+{
+    protected $version;
+
+    public function __construct($version=1)
+    {
+        $this->version = (int)$version;
+    }
+
+    /** {@inheritdoc} */
+    public function mapGpioToLogicalPin($gpio)
+    {
+        switch ($gpio) {
+            case 17:    return 0;
+            case 18:    return 1;
+            // ..
+        
+        }
+    }
+    
+    /** {@inheritdoc} */
+    public function mapLogicalToGpioPin($logical)
+    {
+        switch ($logical) {
+            case 0:     return 17;
+            case 1:     return 18;
+            case 2:     
+                if ($this->version == 2) {
+                    return 27;
+                }
+                return 21; 
+            case 3:     return 22;
+            case 4:     return 23;
+            case 5:     return 24;
+            case 6:     return 25;
+            case 7:     return 11;
+            case 8:     
+                if ($this->version == 2) {
+                    return 2;
+                }
+                return 0; 
+            case 9:     
+                if ($this->version == 2) {
+                    return 3;
+                }
+                return 1; 
+            case 10:    return 8;
+            case 11:    return 7;
+            case 12:    return 10;
+            case 13:    return 9;
+            case 14:    return 11;
+            case 15:    return 14;
+            case 16:    return 15;
+            case 17:    return 28;
+            case 18:    return 29;
+            case 19:    return 30;
+            case 20:    return 31;
+            default:
+                throw new \Exception;
+        }
+    }
+
+}

lib/GpioMapperInterface.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace NoccyLabs\Gpio;
+
+interface GpioMapperInterface
+{
+    /**
+     * Map the GPIO pin numbers to a more logical number set, such as that of 
+     * wiringPi.
+     */
+    public function mapGpioToLogicalPin($gpio);
+    
+    /**
+     * Map a logical pin number, such as the ones used by wiringPi, into the
+     * actual GPIO pin number.
+     *
+     */
+     public function mapLogicalToGpioPin($logical);
+
+}

lib/GpioPin.php

@@ -0,0 +1,176 @@
+<?php
+
+/*
+ * Copyright (C) 2014, NoccyLabs
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace NoccyLabs\Gpio;
+
+use NoccyLabs\Sansi\Charset as CS;
+
+/**
+ * GPIO pin implementation. This class wraps all interaction with a GPIO pin,
+ * thus decoupling it from the main Gpio class.
+ *
+ */
+class GpioPin
+{
+    protected $fd;
+    
+    protected $pin;
+    
+    protected $value = 0;
+    
+    protected $direction;
+    
+    protected $edge;
+    
+    protected $handler;
+
+    protected $label;
+
+    public function __construct($pin)
+    {
+        $this->pin = (int)$pin;
+        //$this->fd = fopen("/sys/class/gpio/gpio{$pin}/value", "rb");
+    }
+    
+    public function __destruct()
+    {
+        //fclose($this->fd);
+    }
+    
+    public function setDirection($direction)
+    {
+        if (!in_array($direction, array("input", "output"))) {
+            throw new \Exception;
+        }
+        $this->direction = $direction;
+        //file_put_contents("/sys/class/gpio/{$this->pin}/direction", $direction);
+        return $this;
+    }
+    
+    public function getDirection()
+    {
+        return $this->direction;
+    }
+    
+    public function setValue($value)
+    {
+        $this->value = (bool)$value;
+        //file_put_contents("/sys/class/gpio/{$this->pin}/value", (int)$this->value);
+        return $this;
+    }
+    
+    public function getValue()
+    {
+        return $this->value;
+    }
+    
+    public function setLabel($label)
+    {
+        $this->label = (string)$label;
+        return $this;
+    }
+    
+    public function getLabel()
+    {
+        return $this->label;
+    }
+    
+    public function export()
+    {
+        /*
+        file_put_contents("/sys/class/gpio/export", $this->pin);
+        if (!file_exists("/sys/class/gpio/gpio{$this->pin}")) {
+            throw new \Exception();
+        }
+        */
+        return $this;
+    }
+    
+    public function unexport()
+    {
+        //file_put_contents("/sys/class/gpio/unexport", $this->pin);
+        return $this;
+    }
+    
+    public function setEdge($edge)
+    {
+        if (!in_array($edge, array("rising", "falling", "both", "none"))) {
+            throw new \Exception;
+        }
+        $this->edge = $edge;
+        //file_put_contents("/sys/class/gpio/{$this->pin}/edge", $edge);
+        return $this;
+    }
+    
+    public function getEdge()
+    {
+        return $this->edge;
+    }
+    
+    public function setHandler(callable $handler=null)
+    {
+        return $this;
+    }
+
+    public function doInterrupt()
+    {
+        fseek($this->fd,0,SEEK_SET);
+        $val = fgets($this->fd);
+    }
+    
+    public function dumpStatus($ansi=false)
+    {
+        if ($ansi) {
+            $status = "\e[43;37;1m          GPIO{$this->pin}          \e[0m\n";
+            $direction = "\e[36;1m".
+                ($this->direction=="input"?(CS::chr(0x2190)):(CS::chr(0x2192))).
+                "\e[0m ".$this->direction;
+            $edge = "\e[33;1m";
+            if ($this->edge == "rising") {
+                $edge.= CS::chr(0x21A5)."\e[0m rising";
+            } elseif ($this->edge == "falling") {
+                $edge.= CS::chr(0x21A7)."\e[0m falling";
+            } else {
+                $edge.= "\e[0m".$this->edge;
+            }
+        } else {
+            $status = "********** GPIO{$this->pin} **********\n";
+            $direction = $this->direction;
+        }
+    
+    
+        foreach(array(    
+            "Direction" => $direction,
+            "Value" => ($this->value?1:0),
+            "Edge" => $edge,
+            "Label" => $this->label,
+            "Hardware" => "unknown",
+            "Int count" => 0
+        ) as $k=>$v) {
+            if ($ansi) {
+                $status.= sprintf("  \e[32;1m%10s\e[0m: \e[0m%s\e[0m\n", $k, $v);
+            } else {
+                $status.= sprintf("  %-10s: %s\n", $k, $v);
+            }
+        }
+        error_log($status);
+        return $this;
+    }
+   
+}