main.cpp

00001 #include "mbed.h"
00002 #include "pinmap.h"
00003 #include "SSD1308.h"
00004 #include "MBed_Adafruit_GPS.h"
00005 
00006 Serial gps(P0_19,P0_18);
00007 
00008 #define DEBUG
00009 
00010 #ifdef DEBUG
00011 #include "USBSerial.h"                       // To use USB virtual serial, a driver is needed, check http://mbed.org/handbook/USBSerial
00012 #define LOG(args...)    pc.printf(args)
00013 USBSerial pc;
00014 #else
00015 #define LOG(args...)
00016 #endif
00017 
00018 #define HARD_SPI        1
00019 #define I2C_FREQ            100000
00020 
00021 I2C i2c(I2C_SDA, I2C_SCL);
00022 //Use Xadow OLED for display
00023 SSD1308 oled = SSD1308(i2c, SSD1308_SA0);
00024 
00025 //GPS Data
00026 
00027 
00028 int main()
00029 {
00030     Adafruit_GPS myGPS(&gps);
00031     char c; //when read via Adafruit_GPS::read(), the class returns single character stored here
00032     Timer refresh_Timer; //sets up a timer for use in loop; how often do we print GPS info?
00033     const int refresh_Time = 1000; //refresh time in ms
00034 
00035     myGPS.begin(9600);
00036     oled.clearDisplay();
00037     oled.writeString(0,0,"GPS Test");
00038     oled.writeString(1,0,"GPS Start");
00039     
00040     wait(1);
00041     
00042     refresh_Timer.start();  //starts the clock on the timer
00043 
00044     while (true) {
00045         c = myGPS.read();   //queries the GPS
00046 
00047         if (c) {
00048             pc.printf("%c", c);    //this line will echo the GPS data if not paused
00049         }
00050 
00051         //check if we recieved a new message from GPS, if so, attempt to parse it,
00052         if ( myGPS.newNMEAreceived() ) {
00053             if ( !myGPS.parse(myGPS.lastNMEA()) ) {
00054                 continue;
00055             }
00056         }
00057 
00058 
00059 
00060         //check if enough time has passed to warrant printing GPS info to screen
00061         //note if refresh_Time is too low or pc.baud is too low, GPS data may be lost during printing
00062         if (refresh_Timer.read_ms() >= refresh_Time) {
00063             refresh_Timer.reset();
00064             pc.printf("Time: %d:%d:%d.%u\n", myGPS.hour, myGPS.minute, myGPS.seconds, myGPS.milliseconds);
00065             pc.printf("Date: %d/%d/20%d\n", myGPS.day, myGPS.month, myGPS.year);
00066             pc.printf("Fix: %d\n", (int) myGPS.fix);
00067             pc.printf("Quality: %d\n", (int) myGPS.fixquality);
00068             if (myGPS.fix) {
00069                 pc.printf("Location: %5.2f%c, %5.2f%c\n", myGPS.latitude, myGPS.lat, myGPS.longitude, myGPS.lon);
00070                 pc.printf("Speed: %5.2f knots\n", myGPS.speed);
00071                 pc.printf("Angle: %5.2f\n", myGPS.angle);
00072                 pc.printf("Altitude: %5.2f\n", myGPS.altitude);
00073                 pc.printf("Satellites: %d\n", myGPS.satellites);
00074             }
00075 
00076             if (myGPS.fix) {
00077                 char oled_str[20];
00078                 oled.writeString(1,0,"GPS Lock ");
00079                 sprintf(oled_str,"LAT:%f",myGPS.latitude);
00080                 oled.writeString(2,0,oled_str);
00081                 sprintf(oled_str,"LON:%f",myGPS.longitude);
00082                 oled.writeString(3,0,oled_str);
00083                 sprintf(oled_str,"ALT:%f",myGPS.altitude);
00084                 oled.writeString(4,0,oled_str);
00085             } else {
00086                 oled.writeString(1,0,"GPS Lost ");
00087             }
00088         }
00089     }
00090 }