From 8d0fe8e515310454783d71ed35c0a1ebcfb90b97 Mon Sep 17 00:00:00 2001
From: Serhii Voloshynov <serhii.voloshynov@globallogic.com>
Date: Tue, 8 Feb 2022 09:46:51 +0200
Subject: GPS sometimes does not detected on device start

---
 .../gpsd/gpsd-3.23/0007-add-gll-vtg.patch          | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 recipes-navigation/gpsd/gpsd-3.23/0007-add-gll-vtg.patch

(limited to 'recipes-navigation/gpsd/gpsd-3.23/0007-add-gll-vtg.patch')

diff --git a/recipes-navigation/gpsd/gpsd-3.23/0007-add-gll-vtg.patch b/recipes-navigation/gpsd/gpsd-3.23/0007-add-gll-vtg.patch
new file mode 100644
index 0000000..777c0ca
--- /dev/null
+++ b/recipes-navigation/gpsd/gpsd-3.23/0007-add-gll-vtg.patch
@@ -0,0 +1,74 @@
+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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