From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Treating parallel port as serial device
Date: 28 Aug 2001 14:55:04 -0700 [thread overview]
Message-ID: <9mh3vo$q9m$1@cesium.transmeta.com> (raw)
In-Reply-To: <9mgtpb$mf4$1@sisko.my.home>
Followup to: <9mgtpb$mf4$1@sisko.my.home>
By author: "Tony Hoyle" <tmh@nothing-on.tv>
In newsgroup: linux.dev.kernel
>
> I'm looking to attach a serial device to my box that has only TTL level
> I/O. Since I'm more of a software than a hardware person making a
> circuit board up with a max232 in is a bit risky... I want to connect
> the I/O to the parallel port.
>
Most RS232 boards accept TTL level input, so your only problem is
output. You may want to simply construct a level converter, such as a
voltage divider or zener diode on your input.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
prev parent reply other threads:[~2001-08-28 21:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-28 20:09 Treating parallel port as serial device Tony Hoyle
2001-08-28 20:15 ` Philip Blundell
2001-08-28 20:38 ` Christopher Friesen
2001-08-28 20:52 ` Jean-Christian de Rivaz
2001-08-28 21:55 ` H. Peter Anvin [this message]
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