Revision 4:4615d6e99bb4, committed 2018-05-31

Comitter:

JimCarver

Date:

Thu May 31 17:21:40 2018 +0000

Parent:

3:cc5c9faa1cc6

Commit message:

Thread based example

Changed in this revision

--- a/GroveGPS.cpp	Sun Apr 22 00:06:53 2018 +0000
+++ b/GroveGPS.cpp	Thu May 31 17:21:40 2018 +0000
@@ -20,15 +20,45 @@
 
 #include "GroveGPS.h"
 
-Serial gps_serial(PE_8, PE_7, 9600);
+Serial gps_serial(D1, D0, 9600);
+
+
+
+//Thread gpsThread;
+GroveGPS gps;
+    
+Semaphore parse;
+Thread parsethread(osPriorityBelowNormal);
 
 
-Thread gpsThread;
-GroveGPS gps;
+    static void parseLine() {
+        while(1) {
+            parse.wait();
+            if (gps._last_line.find("GPGGA") != std::string::npos) {
+                gps.parseGGA();
+            }
+            if (gps._last_line.find("GPZDA") != std::string::npos) {
+                gps.parseZDA();
+            }
+            if (gps._last_line.find("GPVTG") != std::string::npos) {
+                gps.parseVTG();
+            }
+            gps._last_line = "";
+        }
+    }
 
 
+    void readCharacter(char newCharacter) {
+        if (newCharacter == '\n') {
+            parse.release();
+        } else {
+            gps._last_line += newCharacter;
+        }
+    }
+        
+
 void service_serial(void) {
-    gps.readCharacter(gps_serial.getc());
+    readCharacter(gps_serial.getc());
     }
  
 
@@ -44,7 +74,7 @@
     
 void nema_send( void ) {
     
-    char nema_mode[] = "$PMTK314,5,5,5,5,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0*";
+    char nema_mode[] = "$PMTK314,0,0,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0*";
     char nema_cmd[64];
    int x = 0;
     sprintf( nema_cmd, "%s%x\r\n", nema_mode, calc_cs(nema_mode));
@@ -54,11 +84,13 @@
     }
 
 int GPS_init() {
-
+    gps._last_line = "";
    gps_serial.attach( &service_serial, Serial::RxIrq );
    gps.gps_gga.new_flag = 0;
    gps.gps_zda.new_flag = 0;
    gps.gps_vtg.new_flag = 0;
    nema_send();
-    return 0;
+   printf("\r\nGPS Init\r\n");
+   parsethread.start(parseLine);
+   return 0;
 }
\ No newline at end of file

--- a/GroveGPS.h	Sun Apr 22 00:06:53 2018 +0000
+++ b/GroveGPS.h	Thu May 31 17:21:40 2018 +0000
@@ -5,21 +5,17 @@
 #include <stdlib.h>
 #include <string>
 
+
 class GroveGPS {
 
 public:
 
-	GroveGPS() : _last_line("") {}
+	GroveGPS() : _last_line("") {
 
-	void readCharacter(char newCharacter) {
-		if (newCharacter == '\n') {
-			parseLine();
-			_last_line = "";
-		} else {
-			_last_line += newCharacter;
-		}
 	}
 
+	std::string _last_line;
+	
 	struct GGA {
 		double  utc_time; 		// Format: hhmmss.sss
 		double  latitude; 		// Format: ddmm.mmmm
@@ -102,7 +98,8 @@
 		if (gps_gga.position_fix==0) {
 			sprintf(buffer, "N/A");
 		} else {	
-		sprintf(buffer, "%c%f", (gps_gga.ns_indicator == 'N') ? '0' : '-', coordinate);
+		if(gps_gga.ns_indicator == 'S') coordinate *= -1.000;
+		sprintf(buffer, "%f", coordinate);
 		}
 	}
 
@@ -110,13 +107,12 @@
 		double coordinate = convertGPSToDecimal(gps_gga.longitude);
 		if (gps_gga.position_fix==0)
 			sprintf(buffer, "N/A");
-		else
-		sprintf(buffer, "%c%f", (gps_gga.ew_indicator == 'E') ? '0' : '-', coordinate);
+		else {
+		if(gps_gga.ew_indicator == 'W') coordinate *= -1.0000;
+		sprintf(buffer, "%f", coordinate);
+		}
 	}
 
-private:
-	std::string _last_line;
-
 
 	double convertGPSToDecimal(double coordinate) {
 		int degrees = coordinate/100.0;
@@ -126,18 +122,6 @@
 
 	}
 
-	void parseLine() {
-		if (_last_line.find("GPGGA") != std::string::npos) {
-			parseGGA();
-		}
-		if (_last_line.find("GPZDA") != std::string::npos) {
-			parseZDA();
-		}
-		if (_last_line.find("GPVTG") != std::string::npos) {
-			parseVTG();
-		}
-	}
-	
 void parseVTG() {
   		char* pEnd;
 		for (int i=0; i<5; i++) {