Algorythmus zur Impulsberechnung mit 200Hertz Die Sekunde

function testGPIO($pin)
{
    for ($p = 0; $p <= 100; $p++)
    {
        #percent = $p

        for ($i = 0; $i <= 100; $i++)
        {
            #set pin = 1
            shell_exec("gpio write ".$pin." 1");
            #wait
            sleep(($p*(5/100))/1000);
            #set pin = 0
            shell_exec("gpio write ".$pin." 0");

            #wait until next loop
            sleep((5-($p*(5/100)))/1000);

        }

        echo "<script> currentPercent(".$p."); </script>";

    }

}