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Date:      Sat, 09 Dec 2000 15:08:45 -0700
From:      Don Wilde <Don@Silver-Lynx.com>
To:        freebsd-questions@freebsd.org
Subject:   serial data
Message-ID:  <3A32AD6D.6A4DFD79@Silver-Lynx.com>

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Hi, folks -

I'm trying to talk through a serial port, and freebsd's fighting me
every step of the way. (seems that way!)

I've got a microcontroller spitting out 2400 baud characters to ttyd1,
and not all that fast at that. My problem is that the getty process
doesn't seem amenable to control. I tried changing gettytab and ttys,
and I don't seem to have control of things. I can't get echo to stay
off, I can't get it to stay in clocal mode. My C program reading it is
just a simple getc/putc copy function like what's on page 3 of every C
book in sight.

Even poking with stty doesn't seem to affect it, at least not all the
time. Sometimes sending

	stty -f /dev/ttyd1 clocal && ./inputprog </dev/ttyd1 

works, at least after I renice things so that the getty and my program
get all the CPU time, but other times it doesn't work. I'd like to know
why, if someone could tell me.

TIA! I'm not subscribed, so please cc: me.

Don Wilde
Silver Lynx


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