Opening ttyS0
 

Hi All,

I am trying to open the /dev/ttyS0 port and it is not returning from "open" system call.

The program is as follows ...

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main ()
{
int fd;
fd = open("/dev/ttyS0", O_WRONLY|O_NOCTTY); // Never returns from here
if (fd < 0) {
perror ("Error\n");
return -1;
}
printf ("Success");
close(fd);
return 0;
}

In the above program, it never returns from the "open"

What may be the reason? Please help me in this regard.

Thanks
Somesh SS

what distro are u using?

maybe something silly
 

Are the permissions low enough on /dev/ttyS0?

Yes, Permissions are OK.

But I think I got it solved!

I just loaded serial.o driver and it returned success!

Thanks!

Can any one explain me why it was hanging and now when serial,o is loaded, why it works?

Regards

Because you need a driver for the serial port
to be able to use it...


Cheers,
Tink