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Article #13696Re: Communication via USB Port Replicator
From: Leo Havm�ller
Date: Mon, 29 Sep 2003 05:34
Date: Mon, 29 Sep 2003 05:34
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"Eugene Slastenko" <slev@aha.ru> wrote in message news:3f6dcdcc$1@newsgroups.borland.com... > > I want to use USB Port Adapter (Port Replicator: USB->USB,COM,LPT) for > adding still one COM port to my notebook. My program uses asynchronous > serial port i/o. Via standart COM port all works fine. But via Port > Replicator I can write data to and can't read data from the devices. > > What is the difference between standart COM port and USB Port Adapter? Well, one difference is that the USB port replicator has at least 1-2 ms latency. PortMon from http://www.sysinternals.com may help you debug your problem. Leo Havm�ller.
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X-Google-Language: ENGLISH,ASCII X-Google-Thread: 10cc67,390decf1a5098339 X-Google-Attributes: gid10cc67,public X-Google-ArrivalTime: 2003-09-28 22:40:03 PST From: "Leo Havm�ller" <leh@-nospam-rtx.dk> Newsgroups: borland.public.cppbuilder.nativeapi References: <3f6dcdcc$1@newsgroups.borland.com> Subject: Re: Communication via USB Port Replicator Date: Mon, 29 Sep 2003 07:34:54 +0200 Lines: 18 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 NNTP-Posting-Host: 80.63.27.146 Message-ID: <3f77c47d@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1064813693 80.63.27.146 (28 Sep 2003 22:34:53 -0700) Path: arc1-ca.pugleaf.net!news1.google.com!sn-xit-02!sn-xit-04!sn-xit-01!sn-xit-09!supernews.com!news.maxwell.syr.edu!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail