Added gpio lib in /lib/gpio

lib/gpio/high

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/bin/env php $(realpath $(dirname $0))/source/high.php $1;

lib/gpio/in

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/bin/env php $(realpath $(dirname $0))/source/in.php $1;

lib/gpio/low

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/bin/env php $(realpath $(dirname $0))/source/low.php $1;

lib/gpio/out

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/bin/env php $(realpath $(dirname $0))/source/out.php $1;

lib/gpio/source/Pin.php

@@ -0,0 +1,90 @@
+<?php
+
+	class Pin{
+		
+		const GPIO_DIR = '/sys/class/gpio';
+
+		const GPIO_IN  = 'in';
+		const GPIO_OUT = 'out';
+
+		const GPIO_HIGH = 1;
+		const GPIO_LOW  = 0;
+
+		private $pin;
+		private $mode;
+		private $value;
+
+		public function __construct($pin){
+			if( !is_int($pin) )
+				throw new Exception("pin must be an integer");
+
+
+			/* (1) Make gpio pin available */
+			if( !file_exists(Pin::GPIO_DIR.'/gpio'.$pin) )
+				file_put_contents(Pin::GPIO_DIR.'/export', $pin);
+
+			/* (2) add attribute */
+			$this->pin = $pin;
+		}
+
+
+		public function __get($attr){
+
+			// if try to fetch value
+			if( $attr == 'value' ){
+
+				return ( file_get_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/value') == '1' ) ? Pin::GPIO_HIGH : Pin::GPIO_LOW;
+
+			// if try to fetch mode
+			}else if( $attr == 'mode' ){
+
+				return ( file_get_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/value') == 'in' ) ? Pin::GPIO_IN : Pin::GPIO_OUT;
+
+			}
+
+		}
+
+
+		public function __set($attr, $value){
+
+			// if try to set value
+			if( $attr == 'value' ){
+		
+				if( $value == Pin::GPIO_HIGH )
+					file_put_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/value', 1);
+				else if( $value == Pin::GPIO_LOW )
+					file_put_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/value', 0);
+
+			// if try to set mode
+			}else if( $attr == 'mode' ){
+
+				if( $value == Pin::GPIO_IN )
+					file_put_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/direction', 'in');
+				else if( $value == Pin::GPIO_OUT )
+					file_put_contents(Pin::GPIO_DIR.'/gpio'.$this->pin.'/direction', 'out');
+			}
+
+
+		}
+
+
+
+	}
+
+
+	// USAGE
+	//
+	// $red   = new GPIOPin(16);
+	// $green = new GPIOPin(20);
+	// $blue  = new GPIOPin(21);
+
+	// $red->setMode(GPIO_OUT);
+	// $green->setMode(GPIO_OUT);
+	// $blue->setMode(GPIO_OUT);
+
+	// $red->set(GPIO_HIGH)
+	// $green->set(GPIO_LOW)
+	// $blue->set(GPIO_HIGH)
+
+
+?>

lib/gpio/source/high.php

@@ -0,0 +1,39 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+	require_once __DIR__.'/Pin.php';
+
+	function gpio_high($pin){
+
+		/* (1) Create GPIO Pin instance */
+		try{
+
+			$gpio = new Pin($pin);
+
+		}catch(Exception $e){
+
+			return 127;
+
+		}
+
+
+		/* (2) Set mode to in */
+		$gpio->value = Pin::GPIO_HIGH;
+
+	}
+
+
+	/* [1] Check argument
+	=========================================================*/
+	if( $argc < 2 || !preg_match('@^\d+$@', $argv[1]) ){
+		echo 127;
+		die();
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	echo gpio_high($argv[1]);
+?>
+

lib/gpio/source/in.php

@@ -0,0 +1,39 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+	require_once __DIR__.'/Pin.php';
+
+	function gpio_in($pin){
+
+		/* (1) Create GPIO Pin instance */
+		try{
+
+			$gpio = new Pin($pin);
+
+		}catch(Exception $e){
+
+			return 127;
+
+		}
+
+
+		/* (2) Set mode to in */
+		$gpio->mode = Pin::GPIO_IN;
+
+	}
+
+
+	/* [1] Check argument
+	=========================================================*/
+	if( $argc < 2 || !preg_match('@^\d+$@', $argv[1]) ){
+		echo 127;
+		die();
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	echo gpio_in($argv[1]);
+?>
+

lib/gpio/source/low.php

@@ -0,0 +1,39 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+	require_once __DIR__.'/Pin.php';
+
+	function gpio_low($pin){
+
+		/* (1) Create GPIO Pin instance */
+		try{
+
+			$gpio = new Pin($pin);
+
+		}catch(Exception $e){
+
+			return 127;
+
+		}
+
+
+		/* (2) Set mode to in */
+		$gpio->value = Pin::GPIO_LOW;
+
+	}
+
+
+	/* [1] Check argument
+	=========================================================*/
+	if( $argc < 2 || !preg_match('@^\d+$@', $argv[1]) ){
+		echo 127;
+		die();
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	echo gpio_low($argv[1]);
+?>
+

lib/gpio/source/out.php

@@ -0,0 +1,39 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+	require_once __DIR__.'/Pin.php';
+
+	function gpio_out($pin){
+
+		/* (1) Create GPIO Pin instance */
+		try{
+
+			$gpio = new Pin($pin);
+
+		}catch(Exception $e){
+
+			return 127;
+
+		}
+
+
+		/* (2) Set mode to in */
+		$gpio->mode = Pin::GPIO_OUT;
+
+	}
+
+
+	/* [1] Check argument
+	=========================================================*/
+	if( $argc < 2 || !preg_match('@^\d+$@', $argv[1]) ){
+		echo 127;
+		die();
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	echo gpio_out($argv[1]);
+?>
+