From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 25 05:37:50 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 173CB37B404 for ; Wed, 25 Jun 2003 05:37:50 -0700 (PDT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 463D343FDD for ; Wed, 25 Jun 2003 05:37:48 -0700 (PDT) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) by srv1.cosmo-project.de (8.12.9/8.12.9) with ESMTP id h5PCbfhR077886 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Wed, 25 Jun 2003 14:37:44 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (cicely12.cicely.de [IPv6:3ffe:400:8d0:301::12]) by cicely5.cicely.de (8.12.9/8.12.9) with ESMTP id h5PCbdDn037560 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 25 Jun 2003 14:37:39 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.12.9/8.12.9) with ESMTP id h5PCbcgt053101; Wed, 25 Jun 2003 14:37:38 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.12.9/8.12.9/Submit) id h5PCbcLR053100; Wed, 25 Jun 2003 14:37:38 +0200 (CEST) Date: Wed, 25 Jun 2003 14:37:38 +0200 From: Bernd Walter To: Danny Braniss Message-ID: <20030625123737.GE52854@cicely12.cicely.de> References: <20030625120837.GC52854@cicely12.cicely.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: FreeBSD cicely12.cicely.de 5.1-CURRENT alpha User-Agent: Mutt/1.5.4i cc: freebsd-hackers@freebsd.org cc: ticso@cicely.de Subject: Re: USB, select/poll for ucom X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ticso@cicely.de List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Jun 2003 12:37:50 -0000 On Wed, Jun 25, 2003 at 03:27:30PM +0300, Danny Braniss wrote: > > On Wed, Jun 25, 2003 at 01:13:56PM +0300, Danny Braniss wrote: > > > hi, > > > while trying to port an application that works with tty to uplcom/ucom, > > > (and it doesn't work :-), and looking at the kernel sources and > > > trying to figure out USB, i think that select(2)/poll(2) will not work, > > > correct? > > > > I've seen Problemes with non 8n1 communications and I've also seen > > problems because most USB adapters only deliver 5.5V to the lines. > > I never noticed any select/poll problems and I don't think we have any > > because this is handled in common code at tty level. > > > > If you have any condition that shows something different please let > > us know. > > > > i turned debug on and i could not see any calls to ucomread, > the program calls select(...) - but select does not initiate anything, > it justs waits to be woken when something is received (in the case of reading), > now, unless im wrong - which well could be :-), the read in this case must be > started - usb is a master/slave protocol, and this is not happening. Because you don't talk to ucom directly - you talk to tty layer. See src/sys/kern/tty* > if(select(fdset,...)) { > if(FD_ISSET(ifd, fdset)) > read(ifd, ... > ... > } > danny > PS: im using 5.1-current, and im trying to get a Towitoko smartcard reader to > work. Forget it - if I'm not wrong Towitoko readers use 7 bit transfers and that's your problem. It's doesn't with at least uplcom and uftdi - Towitoko is using PL2303 chips in their own USB product. The only thing you can do to get this working is by fixing 7 bit transfers. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de