<?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\Util; use NoccyLabs\Gpio\GpioPin; class BitmappedGpio { protected $gpio = array(); public function __construct() { $this->gpio = array_fill(0,7,null); } public function setGpioPin($bit, GpioPin $gpiopin = null) { if (($bit >= 0) && ($bit <= 7)) { $this->gpio[$bit] = $gpiopin; } else { throw new \Exception("bit must be 0-7"); } } public function read() { $r = 0; foreach($this->gpio as $bit=>$gpio) { if ($gpio->getValue()) { $r |= 1<<$bit; } } return $r; } public function write($byte) { $r = 0; foreach($this->gpio as $bit=>$gpio) { if ($gpio) { $gpio->setValue((bool)($byte & (1<<$bit))); } } return $this; } }