X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FNetwork%2Fgarmin.cxx;h=f2c8f32880486396370c51482e8c93f3181687c3;hb=ba840da288689d7b634581776b44846a55be579e;hp=45e03c66c211c8e9193fcc54df837c811d8a1dd3;hpb=96a9152b0254d17a6cc51b31c7e0277aec270c5e;p=flightgear.git

diff --git a/src/Network/garmin.cxx b/src/Network/garmin.cxx
index 45e03c66c..f2c8f3288 100644
--- a/src/Network/garmin.cxx
+++ b/src/Network/garmin.cxx
@@ -24,12 +24,15 @@
 #include <simgear/debug/logstream.hxx>
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/io/iochannel.hxx>
+#include <simgear/timing/sg_time.hxx>
 
 #include <FDM/flight.hxx>
+#include <Main/fg_props.hxx>
 #include <Main/globals.hxx>
 
 #include "garmin.hxx"
 
+SG_USING_NAMESPACE(std);
 
 FGGarmin::FGGarmin() {
 }
@@ -62,7 +65,7 @@ static char calc_nmea_cksum(char *sentence) {
 bool FGGarmin::gen_message() {
     // cout << "generating garmin message" << endl;
 
-    char rmc[256], rmc_sum[256], rmz[256], rmz_sum[256];
+    char rmc[256], rmc_sum[256], rmz[256], rmz_sum[256], gsa[256];
     char dir;
     int deg;
     double min;
@@ -73,29 +76,29 @@ bool FGGarmin::gen_message() {
     sprintf( utc, "%02d%02d%02d", 
 	     t->getGmt()->tm_hour, t->getGmt()->tm_min, t->getGmt()->tm_sec );
 
-    char lat[20];
+    char rmc_lat[20];
     double latd = cur_fdm_state->get_Latitude() * SGD_RADIANS_TO_DEGREES;
     if ( latd < 0.0 ) {
-	latd *= -1.0;
+	latd = -latd;
 	dir = 'S';
     } else {
 	dir = 'N';
     }
     deg = (int)(latd);
     min = (latd - (double)deg) * 60.0;
-    sprintf( lat, "%02d%06.3f,%c", abs(deg), min, dir);
+    sprintf( rmc_lat, "%02d%07.4f,%c", abs(deg), min, dir);
 
-    char lon[20];
+    char rmc_lon[20];
     double lond = cur_fdm_state->get_Longitude() * SGD_RADIANS_TO_DEGREES;
     if ( lond < 0.0 ) {
-	lond *= -1.0;
+	lond = -lond;
 	dir = 'W';
     } else {
 	dir = 'E';
     }
     deg = (int)(lond);
     min = (lond - (double)deg) * 60.0;
-    sprintf( lon, "%03d%06.3f,%c", abs(deg), min, dir);
+    sprintf( rmc_lon, "%03d%07.4f,%c", abs(deg), min, dir);
 
     char speed[10];
     sprintf( speed, "%05.1f", cur_fdm_state->get_V_equiv_kts() );
@@ -107,26 +110,39 @@ bool FGGarmin::gen_message() {
     sprintf( altitude_m, "%02d", 
 	     (int)(cur_fdm_state->get_Altitude() * SG_FEET_TO_METER) );
 
-    char altitude_ft[10];
-    sprintf( altitude_ft, "%02d", (int)cur_fdm_state->get_Altitude() );
-
     char date[10];
+    int year = t->getGmt()->tm_year;
+    while ( year >= 100 ) { year -= 100; }
     sprintf( date, "%02d%02d%02d", t->getGmt()->tm_mday, 
-	     t->getGmt()->tm_mon+1, t->getGmt()->tm_year );
+	     t->getGmt()->tm_mon+1, year );
+
+    char magvar[10];
+    float magdeg = fgGetDouble( "/environment/magnetic-variation-deg" );
+    if ( magdeg < 0.0 ) {
+        magdeg = -magdeg;
+        dir = 'W';
+    } else {
+        dir = 'E';
+    }
+    sprintf( magvar, "%05.1f,%c", magdeg, dir );
 
-    // $GPRMC,HHMMSS,A,DDMM.MMM,N,DDDMM.MMM,W,XXX.X,XXX.X,DDMMYY,XXX.X,E*XX
-    sprintf( rmc, "GPRMC,%s,A,%s,%s,%s,%s,%s,000.0,E",
-	     utc, lat, lon, speed, heading, date );
+    // $GPRMC,HHMMSS,A,DDMM.MMMM,N,DDDMM.MMMM,W,XXX.X,XXX.X,DDMMYY,XXX.X,E*XX
+    sprintf( rmc, "GPRMC,%s,A,%s,%s,%s,%s,%s,%s",
+	     utc, rmc_lat, rmc_lon, speed, heading, date, magvar );
     sprintf( rmc_sum, "%02X", calc_nmea_cksum(rmc) );
 
     // sprintf( gga, "$GPGGA,%s,%s,%s,1,04,0.0,%s,M,00.0,M,,*00\r\n",
     //          utc, lat, lon, altitude_m );
 
-    sprintf( rmz, "PGRMZ,%s,f,3", altitude_ft );
+    sprintf( rmz, "PGRMZ,%s,M,3", altitude_m );
     sprintf( rmz_sum, "%02X", calc_nmea_cksum(rmz) );
 
+    sprintf( gsa, "%s",
+             "$GPGSA,A,3,01,02,03,,05,,07,,09,,11,12,0.9,0.9,2.0*38" );
+
     SG_LOG( SG_IO, SG_DEBUG, rmc );
     SG_LOG( SG_IO, SG_DEBUG, rmz );
+    SG_LOG( SG_IO, SG_DEBUG, gsa );
 
     string garmin_sentence;
 
@@ -135,14 +151,18 @@ bool FGGarmin::gen_message() {
     garmin_sentence += rmc;
     garmin_sentence += "*";
     garmin_sentence += rmc_sum;
-    garmin_sentence += "\n";
+    garmin_sentence += "\r\n";
 
     // RMZ sentence (garmin proprietary)
     garmin_sentence += "$";
     garmin_sentence += rmz;
     garmin_sentence += "*";
     garmin_sentence += rmz_sum;
-    garmin_sentence += "\n";
+    garmin_sentence += "\r\n";
+
+    // GSA sentence (totally faked)
+    garmin_sentence += gsa;
+    garmin_sentence += "\r\n";
 
     cout << garmin_sentence;
 
@@ -324,7 +344,7 @@ bool FGGarmin::parse_message() {
 	    string alt_units = msg.substr(begin, end - begin);
 	    begin = end + 1;
 
-	    if ( alt_units != (string)"F" && alt_units != (string)"f" ) {
+	    if ( alt_units != "F" && alt_units != "f" ) {
 		altitude *= SG_METER_TO_FEET;
 	    }
 
@@ -372,7 +392,7 @@ bool FGGarmin::process() {
     if ( get_direction() == SG_IO_OUT ) {
 	gen_message();
 	if ( ! io->write( buf, length ) ) {
-	    SG_LOG( SG_IO, SG_ALERT, "Error writing data." );
+	    SG_LOG( SG_IO, SG_WARN, "Error writing data." );
 	    return false;
 	}
     } else if ( get_direction() == SG_IO_IN ) {