-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sat, 23 Aug 2003, Volker Kuhlmann wrote:
> I got the impression that Vik was asking about one of these serial-port > adapter things with DB9 connector (I'm talking hardware here) which > hook up to a USB port. In other words, they turn a USB port into a > serial port. A few months ago I was wondering that myself, and thought > that it would require special serial drivers which know that there is a > USB in between, and that getting a PCI card with a serial port on it was > going to be faster. I had thought that USB->Serial converters were covered by a common standard like USB Storage, but it doesn't seem the case.. There's a specific set of USB drivers in Linux for serial port adapters. Have a read of Documentation/usb/usb-serial.txt in your favourite kernel tree. I can't see any reason why it would be slower (in pure bandwidth terms) than a PCI board. It may have higher latency, but it'd probably not be noticable at common serial speeds. > > That means that setserial probably has no idea what to do with it... > > I'm afraid that seems likely. These kind of programs assume a certain > kind of hardware, and they don't expect that there is a USB bus in > between. I might be wrong - I'd like to know too. setserial should see it as a true serial port, and not anything which looks like USB, except the name of the device file. Whether or not you get full functionality (like flow control) seems to depend on the adapter and driver. - -- David Zanetti <[EMAIL PROTECTED]> | (__) #include <geek/unix.h> | ( oo Mooooooo "Hope.. is a dangerous thing." | /(_O ./ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: Made with pgp4pine 1.75-6 iD8DBQE/R0BaT21+qRy4P+QRAkpLAKC/8ON3r/+z6to3oYVbhaqRbXUmcACgjqaj Uz5aPT/BYpObY2WS8bwyOS8= =NvFR -----END PGP SIGNATURE-----
