From: John Coppens <john@jcoppens.com>
To: "Lars Bjørndal" <lars@lamasti.net>
Cc: linux-msdos <linux-msdos@vger.kernel.org>
Subject: Re: Problem with serial port access
Date: Mon, 23 Mar 2015 11:41:53 -0300 [thread overview]
Message-ID: <20150323114153.bc770a4ac2dfef8b2fd144de@jcoppens.com> (raw)
In-Reply-To: <m361dyxix4.fsf@dalen.lamasti.net>
On Sat, 29 Nov 2014 13:58:31 +0100
lars@lamasti.net (Lars Bjørndal) wrote:
> Hope someone can help.
This is somewhat late... and you've probably already solved the
problem.
Serial port communications is nearly always a headache... I used it for
many years!
Did you check the cable? Does the cable implement the DTR/DSR and/or
CTS/RTS lines (in both directions?) Some cables have strange (and
incorrect) connections at each side.
Some software also uses those lines differently from others. One of
the pairs (DSR/DTR I believe) is software controlled, so they can be
activated at different times.
To avoid cable problems you can try to enable XON/XOFF, and disable
hardware handshaking. This is simpler to debug, and even the simplest
cable should work (3 wires only).
John
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next prev parent reply other threads:[~2015-03-23 14:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-29 12:58 Problem with serial port access Lars Bjørndal
2015-03-23 14:41 ` John Coppens [this message]
2015-03-23 19:45 ` Lars Bjørndal
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