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
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.cpp
- Revision:
- 5:c5f700c1e1af
- Parent:
- 1:4b5ffae743c0
- Child:
- 6:f0c13bb7d266
diff -r 7240a18102a6 -r c5f700c1e1af nmea.cpp --- a/nmea.cpp Sat Feb 18 01:37:25 2017 +0000 +++ b/nmea.cpp Wed Mar 01 03:38:03 2017 +0000 @@ -207,7 +207,9 @@ res_fLongitude = string2float(tmp_words[5]); // get decimal format if (tmp_words[4][0] == 'S') res_fLatitude *= -1.0; + res_clat = tmp_words[4][0]; if (tmp_words[6][0] == 'W') res_fLongitude *= -1.0; + res_clon = tmp_words[6][0]; float degrees = trunc(res_fLatitude / 100.0f); float minutes = res_fLatitude - (degrees * 100.0f); res_fLatitude = degrees + minutes / 60.0f; @@ -328,6 +330,14 @@ return res_fBearing; } +char NMEA::getlatc() { + return res_clat; +} + +char NMEA::getlonc() { + return res_clon; +} + float NMEA::trunc(float v) { if(v < 0.0) { v*= -1.0;