Help using termios

[goblin]

Hi all

I'm struggeling to get my serial port settings changed using termios.
I can change the baud rate fine, but none of the control flags respond
to my changes. As an example:

#include <stdio.h>
#Iinclude <termios.h>

int main (void) {
struct termios settings;
FILE* pPort;

if (!(pPort = fopen("/dev/ttyUSB0","r+"))) {
printf("Oops0\n");
return 1;
}

if (tcgetattr(fileno(pPort), &settings) != 0) printf("Oops1\n");
cfsetispeed(&settings, B9600);
cfsetospeed(&settings, B9600);
settings.c_iflag |= CSTOPB;
if (tcsetattr(fileno(pPort), TCSANOW, &settings) != 0)
printf("Oops2\n");

fclose(pPort);
}

This will change the current baud rate to the selected 9600, but the
will not set two stop bits as I think it should. What am I doing wrong
here?

Any help would be sincerely appreciated.

Piet

[Pietro Cerutti]

goblin wrote:

Hi all

I'm struggeling to get my serial port settings changed using termios.
I can change the baud rate fine, but none of the control flags respond
to my changes.

Termios is not part of the C standard, it's SUS2.

You will find more useful answers in comp.unix.programmer.

--
Pietro Cerutti

[goblin]

Thank you for pointing me to the correct newsgroup. I have reposted
there.
http://groups.google.co.za/group/com...df8e0a4bd205c#

[Antoninus Twink]

On 22 May 2008 at 13:23, goblin wrote:

I'm struggeling to get my serial port settings changed using termios.
I can change the baud rate fine, but none of the control flags respond
to my changes.

[snip]

settings.c_iflag |= CSTOPB;

You mean settings.c_cflag (control settings, not input).