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From 596089b8582097c1f934a5d25035353f00118965 Mon Sep 17 00:00:00 2001
From: Mykyta Dorokhin <mykyta.dorokhin@globallogic.com>
Date: Tue, 28 Dec 2021 15:56:07 +0200
Subject: [PATCH] add GLL and VTG to 'gpspipe -r' output in binary mode
---
gpsd/pseudonmea.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/gpsd/pseudonmea.c b/gpsd/pseudonmea.c
index 2d63d0f..feb9867 100644
--- a/gpsd/pseudonmea.c
+++ b/gpsd/pseudonmea.c
@@ -171,6 +171,21 @@ void gpsd_position_fix_dump(struct gps_device_t *session,
* Differential base station ID */
(void)strlcat(bufp, ",", len);
nmea_add_checksum(bufp);
+
+ //$GNGGA,103527.00,4957.22994,N,03618.97862,E,1,12,0.89,180.3,M,17.0,M,,*4B
+ //$GNGLL,4957.22997,N,03618.97858,E,103526.00,A,A*7B
+ //we use the same values as in GGA sentence
+ char *bufgll = &bufp[strlen(bufp)];
+ (void)snprintf(bufgll, len,
+ "$GPGLL,%s,%c,%s,%c,%s,%c,A,",
+ lat_str,
+ ((session->gpsdata.fix.latitude > 0) ? 'N' : 'S'),
+ lon_str,
+ ((session->gpsdata.fix.longitude > 0) ? 'E' : 'W'),
+ time_str,
+ ((fixquality != FIX_QUALITY_INVALID) ? 'A' : 'V')
+ );
+ nmea_add_checksum(bufgll);
}
}
@@ -183,6 +198,7 @@ static void gpsd_transit_fix_dump(struct gps_device_t *session,
char lat_str[BUF_SZ];
char lon_str[BUF_SZ];
char speed_str[BUF_SZ];
+ char kspeed_str[BUF_SZ];
char track_str[BUF_SZ];
char var_str[BUF_SZ];
char *var_dir = "";
@@ -231,6 +247,27 @@ static void gpsd_transit_fix_dump(struct gps_device_t *session,
time2_str,
var_str, var_dir);
nmea_add_checksum(bufp);
+
+ //$GNRMC,114740.00,A,4957.22826,N,03618.97015,E,0.054,,091220,,,A*65
+ //$GNVTG,,T,,M,0.054,N,0.100,K,A*3D
+ //1 = Track made good
+ //2 = Fixed text 'T' indicates that track made good is relative to true north
+ //3 = Track made good, degrees Magnetic
+ //4 = Magnetic track indicator - 'M'
+ //5 = Speed over ground in knots
+ //6 = Fixed text 'N' indicates that speed over ground in in knots
+ //7 = Speed over ground in kilometers/hour
+ //8 = Fixed text 'K' indicates that speed over ground is in kilometers/hour
+ //we use the same values as in RMC sentence
+ char *bufvtg = &bufp[strlen(bufp)];
+ (void)snprintf(bufvtg, len,
+ "$GPVTG,%s,T,%s,M,%s,N,%s,K,A,",
+ track_str,
+ track_str,//it is not Magnetic track, but may be it is enough
+ speed_str,
+ f_str(session->gpsdata.fix.speed, "%.4f", kspeed_str)
+ );
+ nmea_add_checksum(bufvtg);
}
static void gpsd_binary_satellite_dump(struct gps_device_t *session,
--
2.25.1
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