Date: Sun, 15 Aug 2010 16:10:05 GMT From: Ed Schouten <ed@80386.nl> To: freebsd-usb@FreeBSD.org Subject: Re: usb/149675: uftdi doesn't react to break properly Message-ID: <201008151610.o7FGA5rE008529@freefall.freebsd.org>
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The following reply was made to PR usb/149675; it has been noted by GNATS. From: Ed Schouten <ed@80386.nl> To: bug-followup@FreeBSD.org, prt@prt.org, hselasky@c2i.net Cc: Subject: Re: usb/149675: uftdi doesn't react to break properly Date: Sun, 15 Aug 2010 18:02:40 +0200 --wr1Q/2bz0MCWWNYv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hans, Paul, I just looked at the usb_serial.c source code and it seems break/parity conditions are never propagated to the TTY layer: if (ttydisc_rint(tp, buf[cnt], 0) =3D=3D -1) { The third argument is supposed to be a bitmask of TRE_FRAMING, TRE_PARITY, TRE_OVERRUN and TRE_BREAK, to indicate the type of transmission error/condition. This is why breaks are probably just received as zero-bytes. --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --wr1Q/2bz0MCWWNYv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEARECAAYFAkxoD6AACgkQ52SDGA2eCwWfegCeLUhVFlBv4Khtv99m2XHXsqqI GpwAn2wJturYMHd40W+kVGafw8Pkv2iu =Rmbv -----END PGP SIGNATURE----- --wr1Q/2bz0MCWWNYv--
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