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: GPSISR.cpp

Revision:
2:dbc6c0789611
Parent:
1:4b5ffae743c0
Child:
3:e64b8be9ce92
diff -r 4b5ffae743c0 -r dbc6c0789611 GPSISR.cpp
--- a/GPSISR.cpp	Fri Feb 10 17:57:45 2017 +0000
+++ b/GPSISR.cpp	Thu Feb 16 23:55:28 2017 +0000
@@ -19,12 +19,15 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
- 
+#include "nmea.h"
 #include "GPSISR.h"
 
+NMEA nmea; //parse GPS Sentence.
+
 GPS::GPS(PinName tx, PinName rx, int Baud) : _gps(tx, rx) {
     _gps.baud(Baud);
     _gps.attach(this,&GPS::Rx_interrupt, Serial::RxIrq);
+    
     printf("Interrupt Attached");
 }
 
@@ -45,6 +48,14 @@
 void GPS::Rx_interrupt(void) {
     interrupt = 1;
     rx_in = _gps.getc();
+    nmea.fusedata(rx_in);
     interrupt = 0;
     return;
 }
+ bool GPS::isdatardy(void){
+ return  nmea.isdataready();
+     
+}     
+int GPS::getSats(void){
+    return nmea.getSatellites();
+}    
\ No newline at end of file