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dio_tcsetattr

(PHP 4 >= 4.3.0, PHP 5 < 5.1.0)

dio_tcsetattr Establece los atributos terminales y la tasa de baudios del puerto serie

Descripción

dio_tcsetattr(resource $fd, array $options): bool

dio_tcsetattr() establece los atributos terminales y la tasa de baudios del fichero fd.

Parámetros

fd

Descriptor de fichero devuelto por dio_open().

options

Las siguientes opciones están disponibles:

  • 'baud' - tasa de baudios del puerto - puede ser 38400,19200,9600,4800,2400,1800, 1200,600,300,200,150,134,110,75 o 50, el valor por omisión es 9600.

  • 'bits' - bits de datos - puede ser 8,7,6 o 5. El valor por omisión es 8.

  • 'stop' - bits de parada - puede ser 1 o 2. El valor por omisión es 1.

  • 'parity' - paridad - puede ser 0,1 o 2. El valor por omisión es 0.

Valores devueltos

No devuelve ningún valor.

Ejemplos

Ejemplo #1 Asignando la tasa de baudios del puerto serie

<?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;
}
}

?>

Notas

Nota: Esta función no está implementada en plataformas Windows.

add a note

User Contributed Notes 3 notes

up
2
daniel widyanto (kunilkuda at gmail dot com)
19 years ago
I'm using PHP to interface my AVR microcontroller in /dev/ttyS0. I bet someone else does the same.

Here's some hint :
- dio_tcsetattr -> is set to enable :
- RTS / CTS hardware control
- ICANON mode
(means that dio_read will wait until 0x0A/LF or other control character is entered in /dev/ttyS0 before it returns reading result, when you use dio_write it will also send 0x0A/LF automatically in the end of the message to your device).

For those who dont need RTS/CTS and/or ICANON, you can use linux command : stty.

Here's mine :

<?php
exec
('stty -F /dev/ttyS0 4800 raw');

$fd=dio_open('/dev/ttyS0',O_RDWR | O_NOCTTY | O_NDELAY);
dio_fcntl($fd,F_SETFL,0);

dio_write($fd,"\x41",1); // write 0x41 or 'A' to /dev/ttyS0

// Replace result_length with your expected command result length
for ($i=0;$i < result_length;$i++) {
$result .=dio_read($fd, 1);
}
echo
$result;
?>

Refer to :
- Serial Programming Guide for POSIX Operating Systems, http://www.easysw.com/~mike/serial/
- stty man pages
up
0
healer at colorado dot edu
21 years ago
It was frustrating at first because I was trying to get my Linux box to talk to an external serial device (a PIC18F452 programmable chip) and the example provided here refers to fcntl() and open() parameters that aren't in the PHP documentation.

I finally found out what does what through the man pages:

man open
man fcntl

still haven't gotten it to work, or how to reset the ttySx, but thought it may help someone...
up
-3
fherrero at noticiasdenavarra dot com
19 years ago
For Windows the Example 1 looks same this one:

<?php

exec
('mode com1: baud=9600 data=8 stop=1 parity=n xon=on');
// execute 'help mode' in command line of Windows for help

$fd = dio_open('com1:', O_RDWR);

while (
1) {

$data = dio_read($fd, 256);

if (
$data) {
echo
$data;
}
}

?>
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