From owner-freebsd-questions Sun Jan 17 16:25:14 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA00183 for freebsd-questions-outgoing; Sun, 17 Jan 1999 16:25:14 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from kiwi.pinnacle.co.nz (pinsoft.internet.co.nz [202.37.141.181]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA00178 for ; Sun, 17 Jan 1999 16:25:11 -0800 (PST) (envelope-from jonc@pinnacle.co.nz) Received: from kiwi.pinnacle.co.nz (kiwi.pinnacle.co.nz [202.37.163.2]) by kiwi.pinnacle.co.nz (8.8.8/8.8.8) with SMTP id NAA26558; Mon, 18 Jan 1999 13:21:44 +1300 (NZDT) Date: Mon, 18 Jan 1999 13:21:43 +1300 (NZDT) From: Jonathan Chen To: Marcia Perry cc: freebsd-questions@FreeBSD.ORG Subject: Re: RS232 communication In-Reply-To: <199901180008.QAA17477@george.lbl.gov> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG [Please reply to the list, as you'd reach a wider audience, and someone there may know the answer to your question ('cos I certainly don't! Note Cc:] On Sun, 17 Jan 1999, Marcia Perry wrote: > Hi Jonathan, > My question is how to send an SMPTE break character to > a Panasonic WJ-MX20 video mixer/switcher? This mixer/ > switcher is an RS422 device for which we made a cable > and are using an Antona ANC-6090 RS232-422 converter. > The initialization of the Panasonic is to send it an > SMPTE break character, wait 1 ms and read back an 84h, > to indicate all is successful and the device is in the > active state, ready to receive commands. Under LabView, > all is working and the adapter passes a loopback test > run on the PC. So we're pretty sure the cabling is > right and the sequence is right. I've been told various > things about that break char--send 'f0h', send '0fh', > send a null followed by 30h. I tried these as well as > the call to tcsendbreak() -- all with no luck. I seem > to be reading back only the first byte I wrote. So I > wondered if an SMPTE break character can be sent from > software. If so, how? (One manual we got describes this > break char as 17 to 20 bits of logical low or 0, followed > by a minimum of 2 bits of logo > logical high or 1). > > Thanks, > Marcia To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message