If anyone has used ioctl(TIOMIWAIT) I'd appreciate some help. My code waits for a pulse-per-second signal on DCD, the code can be summarised as below, the full code is at http://www.aarnet.edu.au/~gdt/misc/shm_splc.c
I get the message "Input/output error" at the perror() below. The full output can be seen at http://www.aarnet.edu.au/~gdt/misc/shm_splc.txt The RS-232 port has the PPS connected to RS-232 DCD, the PPS ground to RS-232 SignalGnd. No other pins are connected. I also get the same error if only TIOCM_CAR is listed or if the port is opened with O_RDWR. Running Red Hat Linux 9, Linux 2.4.20-20.9 on Intel Pentium M. The serial port works for everything else I've used it for. Running statserial repeatedly shows DCD being pulsed. Any help would be appreciated, I'm a bit at my wit's end. int f; struct termios term; /* Open and configure */ f = open(name, O_RDONLY|O_NOCTTY); tcgetattr(f, &term) (void)cfmakeraw(&term); term.c_iflag |= IGNBRK; term.c_iflag &= ~IXON; term.c_iflag |= IGNPAR; term.c_cflag &= ~PARENB; term.c_cflag &= ~CRTSCTS; term.c_lflag &= ~ISIG; term.c_lflag &= ~ECHO; term.c_cflag &= ~CLOCAL; tcsetattr(f, TCSANOW, &term); int serial_signal = TIOCM_CAR | TIOCM_CTS | TIOCM_DSR; status = ioctl(f, TIOCMIWAIT, &serial_signal); if (status == -1) { perror("/dev/ttyS0"); exit(1); } -- Glen Turner Tel: (08) 8303 3936 or +61 8 8303 3936 Network Engineer Email: [EMAIL PROTECTED] Australian Academic & Research Network www.aarnet.edu.au -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
