From owner-freebsd-small Fri May 19 10:29:15 2000 Delivered-To: freebsd-small@freebsd.org Received: from hindenburg.eboai.org (hindenburg.eboai.org [205.181.254.190]) by hub.freebsd.org (Postfix) with ESMTP id 8949637B669 for ; Fri, 19 May 2000 10:29:13 -0700 (PDT) (envelope-from chip@chocobo.cx) Received: by hindenburg.eboai.org (Postfix, from userid 1000) id 599123D57; Fri, 19 May 2000 13:29:12 -0400 (EDT) Date: Fri, 19 May 2000 13:29:12 -0400 From: Chip Marshall To: freebsd-small@freebsd.org Subject: RS-485 on a PCM-4823 Message-ID: <20000519132912.A74009@setzer.chocobo.cx> Reply-To: chip@chocobo.cx Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.1.4i X-URL: http://www.chocobo.cx/chip/ X-OS: FreeBSD 3.4-RELEASE i386 Sender: owner-freebsd-small@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I've got an Advantech PCM-4823 (single board computer with ethernet, VGA, IDE, 486 etc) running FreeBSD 4.0-RELEASE, and am trying to use the boards second serial port in RS-485 mode. Everything works fine if I use one of the RS-232 ports with an RS-485 adapter connected to it, but when I try to use the built in 485, nothing seems to get received, but transmission works fine (I can see it from the other end.) After a while, the kernel starts complaining on the console about /kernel: sio1: 1069 more tty-level buffer overflows (total 3735) and continues doing this for a little while, ending with a total of 12567 buffer overflows. Anyone using RS-485 successfully or have any idea what I'm doing wrong? Thanks in advance. -- Chip Marshall http://www.chocobo.cx/chip/ Finger for PGP GCM/CS d+(-) s+:++ a18>? C++ UB++++$ P+++$ L- E--- W++ N+@ o K- w O M+ V-- PS PE Y? PGP++ t+@ 5 X R>+ tv+() b++>+++ DI++++ D(-) G++ e>++ h!>++ r-- y- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message