Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 5 Dec 2005 15:27:56 -0500
From:      John Baldwin <jhb@freebsd.org>
To:        Aaron Glenn <aaron.glenn@gmail.com>
Cc:        freebsd-sparc64@freebsd.org
Subject:   Re: serial ports on the Ultra 5
Message-ID:  <200512051527.56872.jhb@freebsd.org>
In-Reply-To: <18f601940512051128i142fd714g22004d8452cff29a@mail.gmail.com>
References:  <18f601940512051025g71b9fc29y4ae37eb3ce2629df@mail.gmail.com> <200512051354.06372.jhb@freebsd.org> <18f601940512051128i142fd714g22004d8452cff29a@mail.gmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help
On Monday 05 December 2005 02:28 pm, Aaron Glenn wrote:
> On 12/5/05, John Baldwin <jhb@freebsd.org> wrote:
> > You don't use sab(4) anymore, but uart(4).
>
> I had a suspicion that was the case, but couldn't confirm it.
>
> > Here are your SAB ports.  /dev/ttyu0 and /dev/ttyu1
>
> Then something more sinister is at work here. A 'cu -l /dev/ttyu0'
> will "connect" me, however I get no prompt, and not input or output
> seems to be passed to the console port. All input gets dumped to the
> shell I executed the cu command from, *after* I kill the first (lowest
> pid) cu process.
>
> Example:
> yang# ps -ax | grep ttyu
>   687  ??  I      0:00.01 /usr/libexec/getty std.9600 ttyu1
>   688  u0  Is+    0:00.01 /usr/libexec/getty std.9600 ttyu0
>   741  p0  R+     0:00.01 grep ttyu
> yang# cu -l /dev/ttyu1 -s 9600
> Connected
> *hit enter a few times, type hello john, then kill the first cu
> process from another shell*
> yang#
> yang#
> yang#
> yang#
> yang#
> yang#
> yang# hello john
> hello: Command not found.
>                          yang#
>
> Reading the handbook section on serial communications again, I don't
> see anything wrong. I'll be the first to admit this type of stuff is
> uncharted territory for me. If I skipped some required reading on the 
> subject, please don't hesitate to point me to it.

Try using /dev/cuau0 instead.  /dev/ttyu0 will wait for CD (carrier detect) 
before it opens.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200512051527.56872.jhb>