<?php
/**
* Phpiwire: A PHP wrapper for wiringPi
*
* Example of using hardware PWM to pulse an LED.
*
* @author Andrew Collington, andy@amnuts.com
* @version 0.2.0
* @link https://github.com/amnuts/phpiwire
* @license MIT, http://acollington.mit-license.org/
*/
namespace Phpiwire;
if (PHP_SAPI !== 'cli') {
echo 'Sorry, you can only use this via the command line.';
return;
}
set_time_limit(0);
echo "Raspberry Pi pulse - use ^C to stop\n";
$pi = new Board();
$p = $pi->getPin(1)->mode(Pin::PWM_OUT);
$p->pwmWrite(0);
$sleep = 500;
$pwmValue = 1024; // 0 min, 1024 max
while (true) {
for ($i = 0; $i <= $pwmValue; ++$i) {
$p->pwmWrite($i);
usleep($sleep);
}
sleep(1);
for ($i = $pwmValue; $i > 0; --$i) {
$p->pwmWrite($i);
usleep($sleep);
}
}
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