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Php dio tcsetattr () function

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(PHP 4 >= 4.3.0, PHP 5)

dio_tcsetattr --  Sets terminal attributes and baud rate for a serial port


void dio_tcsetattr ( resource fd, array options )

The function dio_tcsetattr() sets the terminal attributes and baud rate of the open resource. 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.

Example 1. Setting the baud rate on a serial port


= 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) {


Note: This function is not implemented on Windows platforms.

Php dio tcsetattr Function syntax tag

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Php dio tcsetattr syntax tutorial

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