From 5c50b696518265aa1af4918c69f83e049603c547 Mon Sep 17 00:00:00 2001 From: Marc Balmer Date: Mon, 19 Mar 2007 06:42:37 +0000 Subject: Document recent changes, i.e. that the sensor status can be CRITICAL when tty timestamping is enabled but there is no PPS signal present. --- share/man/man4/nmea.4 | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/share/man/man4/nmea.4 b/share/man/man4/nmea.4 index bd119a1819b..c088810884c 100644 --- a/share/man/man4/nmea.4 +++ b/share/man/man4/nmea.4 @@ -1,6 +1,6 @@ -.\" $OpenBSD: nmea.4,v 1.12 2006/11/29 07:32:08 jmc Exp $ +.\" $OpenBSD: nmea.4,v 1.13 2007/03/19 06:42:36 mbalmer Exp $ .\" -.\" Copyright (c) 2006 Marc Balmer +.\" Copyright (c) 2006, 2007 Marc Balmer .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above @@ -53,8 +53,8 @@ If the attached device sends the GPRMC message in the 13-field format, the operation mode of the GPS device is reported in the sensor description. The sensor timestamp is copied from the tty timestamp if a device with PPS is being used and tty timestamping has been turned on. -Otherwise the sensor timestamp is taken when the initial `$' character is -received from the NMEA device. +Otherwise the sensor timestamp is taken when the initial `$' character of +a message block is received from the NMEA device. .El .Sh SENSOR STATES The quality of the timedelta is reported as the sensor status: @@ -66,6 +66,10 @@ The timedelta is safe to use for applications like .It WARN The attached GPS receiver indicates a warning condition. The timedelta should be used with care. +.It CRITICAL +tty timestamping has been turned on but there is no PPS signal present. +Check you hardware. +Some GPS units need PPS to be manually turned on. .El .Sh SEE ALSO .Xr tty 4 , -- cgit v1.2.3