12-24-2015
I have detected a process which is resetting the serial port settings.
But not able to understand why it is happening.It is a custom application which is resetting the baud rate,
I have another replica server of the same.But I am not facing this kind of problem.
Can some body help me out in this regard.
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LEARN ABOUT PHP
dio_tcsetattr
DIO_TCSETATTR(3) 1 DIO_TCSETATTR(3)
dio_tcsetattr - Sets terminal attributes and baud rate for a serial port
SYNOPSIS
bool dio_tcsetattr (resource $fd, array $options)
DESCRIPTION
dio_tcsetattr(3) sets the terminal attributes and baud rate of the open $fd.
PARAMETERS
o $fd
- The file descriptor returned by dio_open(3).
o $options
- The currently available options are:
o '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.
o 'bits' - data bits - can be 8,7,6 or 5. Default value is 8.
o 'stop' - stop bits - can be 1 or 2. Default value is 1.
o '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 (1) {
$data = dio_read($fd, 256);
if ($data) {
echo $data;
}
}
?>
NOTES
Note
This function is not implemented on Windows platforms.
PHP Documentation Group DIO_TCSETATTR(3)