Date: Wed, 10 Mar 1999 10:45:00 -0800 (PST) From: mperry@george.lbl.gov To: freebsd-questions@freebsd.org Subject: Serial Communication questions Message-ID: <199903101845.KAA06403@george.lbl.gov>
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Hi All,
I'm trying to communicate with a serial device that
requires sending it a hardware BREAK to get it into
its active state. So I'm trying this:
ioctl(file_desc, TIOCSBRK, NULL);
usleep(TIMEOUT);
ioctl(file_desc, TIOCCBRK, NULL);
I'm not having luck, so the following questions
come to mind (and were not answered in the man pages)
1). Does the ioctl() call with argument 2 as TIOCSBRK
add stop bit(s) to the sequence of zero bits that
it sends?
2). One possible c_cflag for the termio struct that
one can specify is CSTOPB. My understanding is
that if CSTOPB is specified, 2 stop bits are sent;
if not specified, then 1 stop bit is used. Is
there a way under freeBSD to specify NO stop bits?
Thanks,
Marcia
(mperry@george.lbl.gov)
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