Date: Wed, 25 Jun 2003 14:08:38 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Danny Braniss <danny@cs.huji.ac.il> Cc: freebsd-hackers@freebsd.org Subject: Re: USB, select/poll for ucom Message-ID: <20030625120837.GC52854@cicely12.cicely.de> In-Reply-To: <E19V7Ho-0001kg-00@cs.huji.ac.il> References: <E19V7Ho-0001kg-00@cs.huji.ac.il>
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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. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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