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File: example/rgbled.php

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  Classes of Andrew Collington  >  iWire PHP Raspberry PI GPIO Class  >  example/rgbled.php  >  Download  
File: example/rgbled.php
Role: Example script
Content type: text/plain
Description: Example script
Class: iWire PHP Raspberry PI GPIO Class
Control a Raspberry PI board using GPIO
Author: By
Last change:
Date: 1 year ago
Size: 1,182 bytes
 

 

Contents

Class file image Download
<?php

/**
 * Phpiwire: A PHP wrapper for wiringPi
 *
 * Example of using software PWM to rotate through an RGB 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";

$sleep = 20000;
$rgb = [100, 0, 0];

while (
true) {
    for (
$dec = 0; $dec < 3; $dec += 1) {
       
$inc = $dec == 2 ? 0 : $dec + 1;
        for (
$i = 0; $i < 100; $i += 1) {
           
$rgb[$dec] -= 1;
           
$rgb[$inc] += 1;
           
writePins($rgb);
           
usleep($sleep);
        }
    }
}

function
writePins(array $rgb)
{
    static
$pi, $r, $g, $b;
    if (
$pi === null) {
       
$pi = new Board();
       
$r = $pi->getPin(0)->mode(Pin::SOFT_PWM_OUT)->softPwmWrite(100);
       
$g = $pi->getPin(1)->mode(Pin::SOFT_PWM_OUT);
       
$b = $pi->getPin(2)->mode(Pin::SOFT_PWM_OUT);
    }
   
$r->softPwmWrite($rgb[0]);
   
$g->softPwmWrite($rgb[1]);
   
$b->softPwmWrite($rgb[2]);
}