From owner-freebsd-questions@FreeBSD.ORG Tue Apr 22 21:05:38 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7DF051065676 for ; Tue, 22 Apr 2008 21:05:38 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: from smtp.knology.net (smtp.knology.net [24.214.63.101]) by mx1.freebsd.org (Postfix) with ESMTP id 0A3008FC15 for ; Tue, 22 Apr 2008 21:05:37 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: (qmail 6163 invoked by uid 0); 22 Apr 2008 21:05:36 -0000 Received: from unknown (HELO Grumpy.DynDNS.org) (216.186.148.249) by smtp8.knology.net with SMTP; 22 Apr 2008 21:05:36 -0000 Received: by Grumpy.DynDNS.org (Postfix, from userid 928) id B5E9D28429; Tue, 22 Apr 2008 16:05:34 -0500 (CDT) Date: Tue, 22 Apr 2008 16:05:34 -0500 From: David Kelly To: Martin McCormick Message-ID: <20080422210534.GB71378@Grumpy.DynDNS.org> References: <200804222041.m3MKfsRb046822@dc.cis.okstate.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200804222041.m3MKfsRb046822@dc.cis.okstate.edu> User-Agent: Mutt/1.4.2.3i Cc: freebsd-questions@freebsd.org Subject: Re: Any Known Issues when using both RS-232 and Native Serial Ports? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Apr 2008 21:05:38 -0000 On Tue, Apr 22, 2008 at 03:41:54PM -0500, Martin McCormick wrote: > We have a FreeBSD6.2 system capturing serial data on /dev/ttyd0. > /dev/ttyd1 is currently set up for serial console use and we may > want to add a third serial port to run yet another serial data > capture engine. > > Since receiving serial data is far more problematic than > transmitting it, can anybody think of any particular problem one > might encounter if both the data acquisition ports happened to > be trying to receive data simultaneously? > > The serial console port is not really an issue because > it will be rarely ever used. Problems with two lousy little serial ports running at the same time under FreeBSD? Heck no! Just use something better than a 16 MHz 386SX with 640K and you'll be fine. BTDT, and even that little system had no problems with serial I/O. -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.