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authorLandry Breuil <landry@cvs.openbsd.org>2018-09-02 08:14:26 +0000
committerLandry Breuil <landry@cvs.openbsd.org>2018-09-02 08:14:26 +0000
commit216272ce4a2cdbc9fdfa43c1f4d892c4ae50d05e (patch)
tree39d9c8757ee14d929a5469eb6d531b3c665adf6f /share/man/man4
parentcd3376dd3fe911bfc7476d477a89fd097f24e1c9 (diff)
Update nmea(4) wrt talker ids.
Prodded by semarie@, reworded by jmc@
Diffstat (limited to 'share/man/man4')
-rw-r--r--share/man/man4/nmea.429
1 files changed, 21 insertions, 8 deletions
diff --git a/share/man/man4/nmea.4 b/share/man/man4/nmea.4
index 98627f13c73..4f5745881d3 100644
--- a/share/man/man4/nmea.4
+++ b/share/man/man4/nmea.4
@@ -1,4 +1,4 @@
-.\" $OpenBSD: nmea.4,v 1.25 2015/01/15 00:48:10 deraadt Exp $
+.\" $OpenBSD: nmea.4,v 1.26 2018/09/02 08:14:25 landry Exp $
.\"
.\" Copyright (c) 2006, 2007 Marc Balmer <mbalmer@openbsd.org>
.\"
@@ -14,7 +14,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: January 15 2015 $
+.Dd $Mdocdate: September 2 2018 $
.Dt NMEA 4
.Os
.Sh NAME
@@ -41,21 +41,34 @@ information and the local time), and position (calculated
latitude and longitude in degrees) can be accessed through the
.Xr sysctl 8
interface.
-.Sh NMEA SENTENCES
+.Pp
The
.Nm
-line discipline decodes the following NMEA 0183 sentences:
-.Bl -tag -width "GPRMCXX"
-.It GPRMC
-Recommended Minimum Specific GPS/TRANSIT Data.
+line discipline decodes NMEA 0183
+Recommended Minimum Specific GPS/TRANSIT Data sentences.
The time and date information and position are extracted.
The warning indication is used to provide the sensor status (see below).
-If the attached device sends the GPRMC message in the 13-field format,
+If the attached device sends the RMC 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 of
a message block is received from the NMEA device.
+.Pp
+RMC messages source are recognised by the first two characters of the
+sentence according to the following prefixes:
+.Pp
+.Bl -tag -width "XXXXX" -offset indent -compact
+.It GP
+GPS
+.It GA
+Galileo
+.It BD
+BeiDou
+.It GL
+Glonass
+.It GN
+Generic GNSS
.El
.Sh SENSOR STATES
The quality of the timedelta is reported as the sensor status: