gameduino and GPS shield

[qmac2011]

I am trying to display some simple GPS Data on my gameduino and I am running into some problems with the output. The code compiles fine , but the screen is blank. I tested the code on the serial monitor and it comes out fine. Any ideas would be appreciated. Here is my code:

# include <TinyGPS.h>

# include <SoftwareSerial.h>



TinyGPS gps;

SoftwareSerial gpsserial(2,3);



float flat, flon;

unsigned long fix_age;

void getgps(TinyGPS &gps);

void setup()

{

Serial.begin(57600);

gpsserial.begin(9600);
GD.begin();
}

//Gather gps data

void getgps(TinyGPS &gps)

{

if(gpsserial.available() > 0) {

int c = gpsserial.read();

if(gps.encode(c))

{



gps.f_get_position(&flat, &flon, &fix_age);

float fmph = gps.f_speed_mph();

GD.ColorRGB(0x000000);

GD.cmd_number( 5, 0, 28, OPT_CENTERX, flat);

GD.cmd_number(35, 0, 28, OPT_CENTERX, flon);

GD.cmd_number(220, 100, 28, OPT_CENTERX, fmph);

delay(3000);

}

}

GD.swap();
}


void loop()

{

getgps(gps);
GD.swap();
GD.finish();
}

[Rev. Rick]

I have used an Adafruit GPS Logging Shield and an UNO R3.

I had the same issue until I changed the RX line to D4, I left the TX on D7. Then it worked like a champ.I also considered cutting the trace on D10 CSS on the GPS board but found that it did not interfere with the processings of data. The Dazzler wants to use D8-D13 for various signals and so I found that changing it on the GPS was easier.

[tftlcdcyg]

As you have shared the sketch, before the instructions:

#include <TinyGPS.h>
#include <SoftwareSerial.h>
You must include these lines:

#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>
The GD.cmd_number instruction only works with integers. You must perform an intermediate operation to be able to display decimal numbers on the screen

[tftlcdcyg]

A new function could be incorporated within the library itself. In the GD2.h file, we can add this line:

void printNfloat2 (int16_t x, int16_t y, float f, int16_t Presc, byte font);

After of (for example):

void cmd_number (int16_t x, int16_t y, byte font, uint16_t options, uint32_t n);
In the GD2.ccp file, after cmd_number, we can add the class:


void GDClass :: printNfloat2 (int16_t x, int16_t y, float f, int16_t Presc, byte font) {
   char floatNumber [50];
   char bufNum [15];

   dtostrf (f, 3, Presc, bufNum);
   sprintf (floatNumber, "% s", bufNum);

   cmd_text (x, y, font, 0, floatNumber);
}
Which would allow us to present floating numbers with several decimal places.
The call to print some floating number on the screen could be:


GD.printNfloat2(GD.w / 2, 200, gps.location.lat(), 6, 28);