Date: Mon, 14 Dec 2009 08:42:04 +0100 From: Ed Schouten <ed@80386.nl> To: Trevor Blackwell <tlb@tlb.org> Cc: freebsd-usb@freebsd.org Subject: Re: USB serial device naming Message-ID: <20091214074204.GW64905@hoeg.nl> In-Reply-To: <C56E01C7-B772-43F9-B5E1-2DBB2F04D4AE@tlb.org> References: <43EC7D78-31E5-4B86-9316-002AE650727A@tlb.org> <200912111038.06875.hselasky@c2i.net> <C56E01C7-B772-43F9-B5E1-2DBB2F04D4AE@tlb.org>
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--AOVdNAQjoPfa0oJU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Trevor, * Trevor Blackwell <tlb@tlb.org> wrote: > I can't seem to find a way to match USB serial ports & tty names. I > have two serial USB devices, which I can distinguish easily from > "usbconfig show_ifdrv" >=20 > <snip> >=20 > and they result in two ttys: > /dev/cuaU0 > /dev/cuaU1 Be sure to keep in mind: the `real' TTY devices are ttyU0 and ttyU1. The cua* devices are callout devices, which unlike the tty* devices don't wait for a carrier detect signal during open(). My opinion is that the USB serial driver shouldn't use a bitmask to keep track of which unit number are available, because we've got a nice KPI for that: http://www.freebsd.org/cgi/man.cgi?query=3Dnew_unrhdr Unfortunately I cannot answer your question. Hopefully Hans can. ;-) Cheers, --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --AOVdNAQjoPfa0oJU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAksl7EwACgkQ52SDGA2eCwU/UwCdFBjvg00/N7vgWJA8hVsPR0On 0QIAn0s17C3ZhyZPJWtLXQDIjuV5TWr1 =QU0O -----END PGP SIGNATURE----- --AOVdNAQjoPfa0oJU--
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