Sergey S / MODGPS

Allows for a GPS module to be connected to a serial port and exposes an easy to use API to get the GPS data.

Fork of MODGPS by Andy K

example3.cpp@7:049436bc2225, 2018-09-29 (annotated)

Committer:
xanter
Date:
Sat Sep 29 20:31:31 2018 +0000
Revision:
7:049436bc2225
Parent:
2:8aa059e7d8b1 
Fixed compiler errors/warnings; Removed hardcode for LPC17xx

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AjK 2:8aa059e7d8b1 1 #ifdef COMPILE_EXAMPLE3_CODE_MODGPS
AjK 2:8aa059e7d8b1 2
AjK 2:8aa059e7d8b1 3 // See forum post http://mbed.org/forum/mbed/topic/2151/
AjK 2:8aa059e7d8b1 4
AjK 2:8aa059e7d8b1 5 #include "mbed.h"
AjK 2:8aa059e7d8b1 6 #include "GPS.h"
AjK 2:8aa059e7d8b1 7
AjK 2:8aa059e7d8b1 8 Serial pc(USBTX, USBRX);
AjK 2:8aa059e7d8b1 9 DigitalOut led1(LED1);
AjK 2:8aa059e7d8b1 10
AjK 2:8aa059e7d8b1 11 // SET THIS.
AjK 2:8aa059e7d8b1 12 // Create an instance of the GPS object. You will need to
AjK 2:8aa059e7d8b1 13 // set p25 to whichever Serial RX pin you have connected
AjK 2:8aa059e7d8b1 14 // your GPS module to.
AjK 2:8aa059e7d8b1 15 GPS gps(NC, GPSRX);
AjK 2:8aa059e7d8b1 16
AjK 2:8aa059e7d8b1 17 // 0.05 second flash of LED2
AjK 2:8aa059e7d8b1 18 DigitalOut led2(LED2);
AjK 2:8aa059e7d8b1 19 Timeout t2;
AjK 2:8aa059e7d8b1 20 void t2out(void) { led2 = 0; }
AjK 2:8aa059e7d8b1 21 void blip2(void) { led2 = 1; t2.attach(&t2out, 0.05); }
AjK 2:8aa059e7d8b1 22
AjK 2:8aa059e7d8b1 23 // 0.05 second flash of LED3
AjK 2:8aa059e7d8b1 24 DigitalOut led3(LED3);
AjK 2:8aa059e7d8b1 25 Timeout t3;
AjK 2:8aa059e7d8b1 26 void t3out(void) { led3 = 0; }
AjK 2:8aa059e7d8b1 27 void blip3(void) { led3 = 1; t3.attach(&t3out, 0.05); }
AjK 2:8aa059e7d8b1 28
AjK 2:8aa059e7d8b1 29 // 0.05 second flash of LED4
AjK 2:8aa059e7d8b1 30 DigitalOut led4(LED4);
AjK 2:8aa059e7d8b1 31
AjK 2:8aa059e7d8b1 32 Timeout t4;
AjK 2:8aa059e7d8b1 33 void t4out(void) { led4 = 0; }
AjK 2:8aa059e7d8b1 34 void blip4(void) { led4 = 1; t4.attach(&t4out, 0.05); }
AjK 2:8aa059e7d8b1 35
AjK 2:8aa059e7d8b1 36 int main() {
AjK 2:8aa059e7d8b1 37 GPS_Time q1;
AjK 2:8aa059e7d8b1 38 GPS_VTG v1;
AjK 2:8aa059e7d8b1 39
AjK 2:8aa059e7d8b1 40 // SET THIS.
AjK 2:8aa059e7d8b1 41 // Ensure you set the baud rate to match your serial
AjK 2:8aa059e7d8b1 42 // communications to your PC/Max/Linux host so you
AjK 2:8aa059e7d8b1 43 // can read the messages.
AjK 2:8aa059e7d8b1 44 pc.baud(PCBAUD);
AjK 2:8aa059e7d8b1 45
AjK 2:8aa059e7d8b1 46 // SET THIS.
AjK 2:8aa059e7d8b1 47 // Most GPS modules use 9600,8,n,1 so that's what
AjK 2:8aa059e7d8b1 48 // we default to here. Ensure your GPS module matches
AjK 2:8aa059e7d8b1 49 // this, otherwise set it to match.
AjK 2:8aa059e7d8b1 50 gps.baud(GPSBUAD);
AjK 2:8aa059e7d8b1 51 gps.format(8, GPS::None, 1);
AjK 2:8aa059e7d8b1 52
AjK 2:8aa059e7d8b1 53 // OPTIONAL
AjK 2:8aa059e7d8b1 54 // If you GPS has a 1 pulse per second output you can
AjK 2:8aa059e7d8b1 55 // connect it to an Mbed pin. Here you specify what pin
AjK 2:8aa059e7d8b1 56 // and on what "edge" teh signal is active. If your GPS
AjK 2:8aa059e7d8b1 57 // module has a rising edge at the one second point then
AjK 2:8aa059e7d8b1 58 // use GPS::ppsRise
AjK 2:8aa059e7d8b1 59 #ifdef PPSPIN
AjK 2:8aa059e7d8b1 60 gps.ppsAttach(PPSPIN, GPS::ppsFall);
AjK 2:8aa059e7d8b1 61 #endif
AjK 2:8aa059e7d8b1 62
AjK 2:8aa059e7d8b1 63 // Sample of a callback to a function when a NMEA GGA message is recieved.
AjK 2:8aa059e7d8b1 64 // For this example, we flash LED2 for 0.05 second.
AjK 2:8aa059e7d8b1 65 gps.attach_gga(&blip2);
AjK 2:8aa059e7d8b1 66
AjK 2:8aa059e7d8b1 67 // Sample of a callback to a function when a NMEA RMC message is recieved.
AjK 2:8aa059e7d8b1 68 // For this example, we flash LED3 for 0.05 second.
AjK 2:8aa059e7d8b1 69 gps.attach_rmc(&blip3);
AjK 2:8aa059e7d8b1 70
AjK 2:8aa059e7d8b1 71 // Sample of a callback to a function when a NMEA VTG message is recieved.
AjK 2:8aa059e7d8b1 72 // For this example, we flash LED4 for 0.05 second.
AjK 2:8aa059e7d8b1 73 gps.attach_vtg(&blip4);
AjK 2:8aa059e7d8b1 74
AjK 2:8aa059e7d8b1 75 while(1) {
AjK 2:8aa059e7d8b1 76 // Every 3 seconds, flip LED1 and print the basic GPS info.
AjK 2:8aa059e7d8b1 77 wait(3);
AjK 2:8aa059e7d8b1 78 led1 = 1;
AjK 2:8aa059e7d8b1 79
AjK 2:8aa059e7d8b1 80 // Demonstrate how to find out the GPS location co-ords.
AjK 2:8aa059e7d8b1 81 pc.printf("Method 1. Lat = %.4f ", gps.latitude());
AjK 2:8aa059e7d8b1 82 pc.printf("Lon = %.4f ", gps.longitude());
AjK 2:8aa059e7d8b1 83 pc.printf("Alt = %.4f ", gps.altitude());
AjK 2:8aa059e7d8b1 84
AjK 2:8aa059e7d8b1 85 // Grab a snapshot of the current time.
AjK 2:8aa059e7d8b1 86 gps.timeNow(&q1);
AjK 2:8aa059e7d8b1 87 pc.printf("%c %02d:%02d:%02d %02d/%02d/%04d\r\n",
AjK 2:8aa059e7d8b1 88 q1.status, q1.hour, q1.minute, q1.second, q1.day, q1.month, q1.year);
AjK 2:8aa059e7d8b1 89
AjK 2:8aa059e7d8b1 90 gps.vtg(&v1);
AjK 2:8aa059e7d8b1 91 pc.printf("Method 1. Vector data, Speed (knots):%lf, Speed(kph):%lf, Track(true):%lf, Track(mag)%lf\r\n",
AjK 2:8aa059e7d8b1 92 v1.velocity_knots(), v1.velocity_kph(), v1.track_true(), v1.track_mag());
AjK 2:8aa059e7d8b1 93
AjK 2:8aa059e7d8b1 94 // Alternative method that does the same thing.
AjK 2:8aa059e7d8b1 95 pc.printf("Method 2. Lat = %.4f ", gps.latitude());
AjK 2:8aa059e7d8b1 96 pc.printf("Lon = %.4f ", gps.longitude());
AjK 2:8aa059e7d8b1 97 pc.printf("Alt = %.4f ", gps.altitude());
AjK 2:8aa059e7d8b1 98
AjK 2:8aa059e7d8b1 99 GPS_Time *q2 = gps.timeNow();
AjK 2:8aa059e7d8b1 100 pc.printf("%c %02d:%02d:%02d %02d/%02d/%04d\r\n",
AjK 2:8aa059e7d8b1 101 q2->status, q2->hour, q2->minute, q2->second, q2->day, q2->month, q2->year);
AjK 2:8aa059e7d8b1 102 delete(q2);
AjK 2:8aa059e7d8b1 103
AjK 2:8aa059e7d8b1 104 GPS_VTG *v2 = gps.vtg();
AjK 2:8aa059e7d8b1 105 pc.printf("Method 2. Vector data, Speed (knots):%lf, Speed(kph):%lf, Track(true):%lf, Track(mag):%lf\r\n\n",
AjK 2:8aa059e7d8b1 106 v2->velocity_knots(), v2->velocity_kph(), v2->track_true(), v2->track_mag());
AjK 2:8aa059e7d8b1 107 delete(v2);
AjK 2:8aa059e7d8b1 108
AjK 2:8aa059e7d8b1 109 led1 = 0;
AjK 2:8aa059e7d8b1 110 }
AjK 2:8aa059e7d8b1 111 }
AjK 2:8aa059e7d8b1 112
AjK 2:8aa059e7d8b1 113 #endif