php-linux-gpio/lib/GpioPin.php

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<?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) {
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$status = "\e[44;37;1m GPIO{$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;
}
}