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Re: Serial port using USB adaptor
On Feb 29 22:20, hce wrote:
> On 2/29/08, Corinna Vinschen <corinna-cygwin@cygwin.com> wrote:
> > /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.
Yeah, I assumed that much. As I said, that's not a device name
Cygwin can do anything useful with.
> > 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.
I didn't say you should open /dev/ttyS8. This was just an example. You
first have to find out (or set?) the number of the virtual COM port.
For all I know it could be COM5 or COM12 or whatever. The important
part is that, after you *know* the number X, you can use /dev/comX or
/dev/tty[X-1] to access this serial port. Just don't access it using
the Windows name, COMx or \\.\COMx, because then you will not get any
POSIX serial I/O support from Cygwin.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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