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