X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Thu, 24 May 2012 14:38:07 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Reading data from ttyS fails
Message-ID: <20120524123807.GE18736@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <1337858727 DOT 3447279826 AT as03 DOT cooltoad DOT com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <1337858727.3447279826@as03.cooltoad.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On May 24 14:25, thunderboy42 wrote:
> I have an embedded system connectet with my PC which sends debug data over the
> rs232. A simple terminal program unter cygwin is used to analyze this data.
> before cygwin 1.7.10 evertything went fine, but now it seems, most transmitted
> characters get lost. even this simple example from wikibooks does not work
> anymore:
> 
>         ...
>         memset(&tio,0,sizeof(tio));
>         tio.c_iflag=0;
>         tio.c_oflag=0;
>         tio.c_cflag=CS8|CREAD|CLOCAL;  
>         tio.c_lflag=0;
>         tio.c_cc[VMIN]=1;
>         tio.c_cc[VTIME]=5;
> 
>         tty_fd=open("/dev/ttyS0", O_RDWR | O_NONBLOCK);
>         cfsetospeed(&tio,B115200);            // 115200 baud
>         cfsetispeed(&tio,B115200);            // 115200 baud
> 
>         tcsetattr(tty_fd,TCSANOW,&tio);
>         while (c!='q')
>         {
>                 if (read(tty_fd,&c,1)>0)        write(STDOUT_FILENO,&c,1);
>         }
>         ...
> 
> So what can I do?

Can you please create a simple testcase for reading from ttyS0
which can be compiled out of the box?


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple