Serial Port - Hardware Flow control

QNX DEVELOPERS General Programming
1

Hi all,

I am writing routines for the serial port and I was wondering if setting the QNX (POSIX) flags “IHFLOW” and “OHFLOW” would have the same effect as setting the Linux “CRTSCTS” (Non-Posix) bit to enable hardware flow control?

eg: tio.c_cflag |= IHFLOW; // Enable INPUT hardware control
tio.c_cflag |= OHFLOW; // Enable OUTPUT hardware control
//QNX
(Where “tio” is a termios struct)

Is the same as :
tio.c_cflag |= CRTSCTS; ???
//Linux
As always, any help is very much appreciated.

RK

2

Hey keano,

IHFLOW and OHFLOW control the rts and cts (hardware handshake) lines.

Greetz,

Martin.

3

Thanks for the reply Martin,
Will the code have the same effect as the Linux version however?

4

They have the same effect.

Martin.