Author: ian Date: Wed Mar 18 14:49:16 2015 New Revision: 280221 URL: https://svnweb.freebsd.org/changeset/base/280221
Log: Update ucom(4) with information about the new PPS capture abilities. Differential Revision: https://reviews.freebsd.org/D2049 Modified: head/share/man/man4/ucom.4 Modified: head/share/man/man4/ucom.4 ============================================================================== --- head/share/man/man4/ucom.4 Wed Mar 18 13:59:04 2015 (r280220) +++ head/share/man/man4/ucom.4 Wed Mar 18 14:49:16 2015 (r280221) @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 3, 2014 +.Dd March 11, 2015 .Dt UCOM 4 .Os .Sh NAME @@ -63,11 +63,34 @@ This means that normal programs such as or .Xr ppp 8 can be used to access the device. +.Sh Pulse Per Second (PPS) Timing Interface +The +.Nm +driver can capture PPS timing information as defined in RFC 2783. +The API, accessed via +.Xr ioctl 8 , +is available on the tty device. +To use the PPS capture feature with +.Xr ntpd 8 , +symlink the tty device to +.Va /dev/pps0. .Pp The -.Va portno -locater can be used to decide which port to use for devices that have -multiple external ports. +.Va hw.usb.ucom.pps_mode +sysctl configures the PPS capture mode. +It can be set in +.Xr loader.conf 5 +or +.Xr sysctl.conf 5 . +The following capture modes are available: +.Bl -tag -compact -offset "mmmm" -width "mmmm" +.It 0 +Capture disabled (default). +.It 1 +Capture pulses on the CTS line. +.It 2 +Capture pulses on the DCD line. +.El .Sh FILES .Bl -tag -width ".Pa /dev/cuaU?" .It Pa /dev/cuaU? _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
