176 lines
4.4 KiB
PHP
176 lines
4.4 KiB
PHP
<?php
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/*
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* Copyright (C) 2014, NoccyLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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namespace NoccyLabs\Gpio;
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use NoccyLabs\Sansi\Charset as CS;
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/**
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* GPIO pin implementation. This class wraps all interaction with a GPIO pin,
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* thus decoupling it from the main Gpio class.
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*
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*/
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class GpioPin
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{
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protected $fd;
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protected $pin;
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protected $value = 0;
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protected $direction;
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protected $edge;
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protected $handler;
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protected $label;
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public function __construct($pin)
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{
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$this->pin = (int)$pin;
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$this->export();
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$this->fd = fopen("/sys/class/gpio/gpio{$pin}/value", "rb");
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}
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public function __destruct()
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{
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fclose($this->fd);
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}
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public function setDirection($direction)
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{
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if (!in_array($direction, array("input", "output"))) {
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throw new \Exception;
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}
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$this->direction = $direction;
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file_put_contents("/sys/class/gpio/gpio{$this->pin}/direction", $direction);
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return $this;
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}
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public function getDirection()
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{
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return $this->direction;
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}
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public function setValue($value)
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{
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$this->value = (bool)$value;
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file_put_contents("/sys/class/gpio/gpio{$this->pin}/value", (int)$this->value);
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return $this;
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}
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public function getValue()
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{
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return $this->value;
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}
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public function setLabel($label)
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{
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$this->label = (string)$label;
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return $this;
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}
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public function getLabel()
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{
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return $this->label;
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}
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public function export()
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{
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file_put_contents("/sys/class/gpio/export", $this->pin);
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if (!file_exists("/sys/class/gpio/gpio{$this->pin}")) {
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throw new \Exception();
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}
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return $this;
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}
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public function unexport()
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{
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file_put_contents("/sys/class/gpio/unexport", $this->pin);
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return $this;
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}
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public function setEdge($edge)
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{
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if (!in_array($edge, array("rising", "falling", "both", "none"))) {
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throw new \Exception;
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}
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$this->edge = $edge;
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file_put_contents("/sys/class/gpio/gpio{$this->pin}/edge", $edge);
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return $this;
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}
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public function getEdge()
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{
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return $this->edge;
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}
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public function setHandler(callable $handler=null)
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{
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return $this;
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}
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public function doInterrupt()
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{
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fseek($this->fd,0,SEEK_SET);
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$val = fgets($this->fd);
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}
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public function dumpStatus($ansi=false)
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{
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if ($ansi) {
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$status = "\e[44;37;1m GPIO{$this->pin} \e[0m\n";
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$direction =
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($this->direction=="input"?(CS::chr(0x2190)):(CS::chr(0x2192))).
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" ".$this->direction;
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$edge = $this->edge; //"";
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/*if ($this->edge == "rising") {
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$edge.= CS::chr(0x21A5)." rising";
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} elseif ($this->edge == "falling") {
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$edge.= CS::chr(0x21A7)." falling";
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} else {
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$edge.= "\e[0m".$this->edge;
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}*/
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} else {
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$status = "********** GPIO{$this->pin} **********\n";
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$direction = $this->direction;
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}
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foreach(array(
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"Direction" => $direction,
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"Value" => ($this->value?1:0),
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"Edge" => $edge,
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"Label" => $this->label,
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"Hardware" => "unknown",
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"Int count" => 0
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) as $k=>$v) {
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if ($ansi) {
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$status.= sprintf(" \e[32;1m%10s\e[0m: \e[0m%s\e[0m\n", $k, $v);
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} else {
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$status.= sprintf(" %-10s: %s\n", $k, $v);
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}
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}
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error_log($status);
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return $this;
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}
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}
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