<?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]);
}
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