X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Message-ID: <95455e980802290320l442955cbhee643416669f0a8d@mail.gmail.com> Date: Fri, 29 Feb 2008 22:20:20 +1100 From: hce To: cygwin@cygwin.com Subject: Re: Serial port using USB adaptor In-Reply-To: <20080229094523.GR9539@calimero.vinschen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <95455e980802281743x3651991av6d87d34b39106332@mail.gmail.com> <20080229094523.GR9539@calimero.vinschen.de> X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On 2/29/08, Corinna Vinschen wrote: > On Feb 29 12:43, hce wrote: > > Hi, > > > > I have a linux serial port problem compiled by Cygwin on window, it > > runs fine if it connects a 9-pin serial cable and the device name is > > /dev/ttyS0 (it does not work with com1, I have to translate it to > > /dev/ttyS0). The problem is when I run the program in a PC without a > > physical 9-pin serial port on hardware: > > > > (1) If there is no USB Serial adaptor connected, it still opens > > /dev/ttyS0 without any errors. Then, it sends data to that port, and > > timeout (does not work). > > > > (2) If I plug a USB-Serial adaptor and change the device name to > > /dev/ttyUSB0, it opens that port witout problem but cannot connect to > > the serial device. > > > /dev/ttyUSB0 works?!? It's no device name recognized by Cygwin, so > I assume you created a file on the disk called /dev/ttyUSB0 when > using it. It was copied from Linux. > My knowledge about serial I/O is rather clumsy, but isn't there a > virtual COM port attached, or can't you attach a virtual COM port to > your USB I/O? AFAIK, you should find something like, say, COM9, which > would be available as /dev/com9 or /dev/ttyS8. My knowledge to Window machine is also limited. So, I should open /dev/com9 or /dev/ttyS8 regardless it is connected to a serial cable or a USB serial adaptor. I don't have the Window machine at home, I'll try next day. Thank you Corinna. Jim -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/