PHP Manual: Sets terminal attributes and baud rate for a serial port

Description

bool dio_tcsetattr(resource $fd, array $options)

dio_tcsetattr sets the terminal attributes and baud rate of the open fd.

Parameters

fd

The file descriptor returned by dio_open.

options

The currently available options are:

'baud' - baud rate of the port - can be 38400,19200,9600,4800,2400,1800, 1200,600,300,200,150,134,110,75 or 50, default value is 9600.
'bits' - data bits - can be 8,7,6 or 5. Default value is 8.
'stop' - stop bits - can be 1 or 2. Default value is 1.
'parity' - can be 0,1 or 2. Default value is 0.

Return Values

No value is returned.

Examples

Example #1 Setting the baud rate on a serial port

<?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 (true) {
    $data = dio_read($fd, 256);
    if ($data !== null && $date !== '') {
        echo $data;
    }
} 

?>

Notes

Note: This function is not implemented on Windows platforms.