Darren Ulrich / GPSISR

A GPS serial interrupt service routine that has an on the fly nmea parser. Works with a STM32F411RE and a Adafruit GPS logger.

Dependents:   Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG

Fork of GPS by Simon Ford

main.cpp

#include "mbed.h"
#include "GPSISR.h"

#define PIN_RX_GPS      PA_12 //GPS Shield RX pin
#define PIN_TX_GPS      PA_11 //GPS Shield TX pin
Serial pc(USBTX, USBRX);

// Set up serial interrupe service handler for gps characters.
GPS MyGPS(PIN_TX_GPS,PIN_RX_GPS, 9600);
int main()
{
    while (1) {
	if (MyGPS.dataready()) {
					MyGPS.read();
					pc.printf("NMEA has valid data");
					pc.printf("Sats : %d \n", MyGPS.buffer.satellites);
					pc.printf("%d-%d-%d\n", MyGPS.buffer.month, MyGPS.buffer.day, MyGPS.buffer.year);
					pc.printf("%d:%d:%d\n", MyGPS.buffer.hours, MyGPS.buffer.minutes, MyGPS.buffer.seconds);
	}
	else {
                pc.printf("NMEA has no valid data");
	}   
   }  
}

Diff: nmea.h

Revision:
5:c5f700c1e1af
Parent:
1:4b5ffae743c0
--- a/nmea.h	Sat Feb 18 01:37:25 2017 +0000
+++ b/nmea.h	Wed Mar 01 03:38:03 2017 +0000
@@ -51,7 +51,9 @@
 		
 		// globals to store parser results
 		float			res_fLongitude;					// GPRMC and GPGGA
+		char			res_clon;						// E or W
 		float			res_fLatitude;					// GPRMC and GPGGA
+		char			res_clat;						// N or S
 		unsigned char	res_nUTCHour, res_nUTCMin, res_nUTCSec,		// GPRMC and GPGGA 
 						res_nUTCDay, res_nUTCMonth, res_nUTCYear;	// GPRMC
 		int				res_nSatellitesUsed;			// GPGGA
@@ -95,7 +97,9 @@
 		int				getMonth();
 		int				getYear();
 		float			getLatitude();
+		char			getlatc();
 		float			getLongitude();
+		char			getlonc();
 		int				getSatellites();
 		float			getAltitude();
 		float			getSpeed();