Hi there.
I'm having a problem with a specific argument of the
ioctl function, which is ioctl(TIOCMGET).
I wrote a simple routine which just reads or writes the
RTS pin.
It worked OK on my Red Hat 9, under x86, but when I try
to run it on a Lite5200 using denx kernel 2.4-25, it
keeps saying "TIOCMGET failed: Invalid argument" and
crashes out...
I think it could be due to some differences between the
two drivers, but I'm not sure about that. I wonder if
there's another argument that could provided me this
information, or if there's a way to ask for it
"manually" with ioctl...
Thanks in advance.
Here's a simple version of my code:
int fd, status;
fd = open("/dev/ttyS0", O_RDWR);
if (ioctl(fd, TIOCMGET, &status) < 0)
printf("TIOCMGET failed: %s\n", strerror(errno));
else
{...
/* then, to check the status, i make this test */
if (status & TIOCM_RTS)
/* to set RTS */
status &= ~TIOCM_RTS;
ioctl(fd, TIOCMSET, &status);
/* and to reset RTS */
status |= TIOCM_RTS;
ioctl(fd, TIOCMSET, &status);
__________________________________________________________________________
Acabe com aquelas janelinhas que pulam na sua tela.
AntiPop-up UOL - ? gr?tis!
http://antipopup.uol.com.br/
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
