public function set_options($options)
{
if (is_array($options)) {
// Check for valid DIO attribute options
foreach ($options as $key => $value) {
// Validate option name
if (!array_key_exists($key, self::$OPTIONS)) {
trigger_error("Invalid PHP Direct IO option specified '" . $key . "'", E_USER_WARNING);
return false;
}
// Validate option value
if (!in_array($value, self::$OPTIONS[$key])) {
trigger_error("Invalid PHP Direct IO value specified for " . $key . " '" . $value . "'", E_USER_WARNING);
return false;
}
}
// If all checks pass, set options
$this->options = $options;
dio_tcsetattr($this->serial, $options);
return true;
}
return false;
}
echoFlush("PHP Direct IO does not appear to be installed for more info see: http://www.php.net/manual/en/book.dio.php");
exit;
}
try {
//the serial port resource
$bbSerialPort;
echoFlush("Connecting to serial port: {$portName}");
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
$bbSerialPort = dio_open($portName, O_RDWR);
//we're on windows configure com port from command line
exec("mode {$portName} baud={$baudRate} data={$bits} stop={$spotBit} parity=n xon=on");
} else {
$bbSerialPort = dio_open($portName, O_RDWR | O_NOCTTY | O_NONBLOCK);
dio_fcntl($bbSerialPort, F_SETFL, O_SYNC);
//we're on 'nix configure com from php direct io function
dio_tcsetattr($bbSerialPort, array('baud' => $baudRate, 'bits' => $bits, 'stop' => $spotBit, 'parity' => 0));
}
if (!$bbSerialPort) {
echoFlush("Could not open Serial port {$portName} ");
exit;
}
// send data
$dataToSend = "4 ";
echoFlush("Writing to serial port data: \"{$dataToSend}\"");
$bytesSent = dio_write($bbSerialPort, $dataToSend);
echoFlush("Sent: {$bytesSent} bytes");
/*
//date_default_timezone_set ("Europe/London");
$runForSeconds = new DateInterval("PT10S"); //10 seconds
$endTime = (new DateTime())->add($runForSeconds);
<?php
$fd = dio_open('/dev/ttyS0', O_RDWR | O_NOCTTY | O_NONBLOCK);
dio_fcntl($fd, F_SETFL, O_SYNC);
dio_tcsetattr($fd, array('baud' => 9600, 'bits' => 8, 'stop' => 1, 'parity' => 0));
while (1) {
$data = dio_read($fd, 256);
if ($data) {
echo $data;
}
}