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	- Project: "GPS Logging"
	- Source Code compiled for: Arduino Uno
	- Source Code created on: 2024-02-11 13:59:07

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* log the position every 10 seconds and write to the */
	/* Micro SD card for offline loading into Google maps */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include 
#include 

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
float getLatitude(); // Function declaration
float getLongitude(); // Function declaration

/***** DEFINITION OF SPI PINS *****/
const uint8_t GPS_SDCardModule_SPI_PIN_MOSI_D11 = 11;
const uint8_t GPS_SDCardModule_SPI_PIN_MISO_D12 = 12;
const uint8_t GPS_SDCardModule_SPI_PIN_SCLK_D13 = 13;
const uint8_t GPS_SDCardModule_SPI_PIN_CS_D10 = 10;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
SdFat sd;
SdFile file;

// Variable to track time
unsigned long lastLogTime = 0;
const unsigned long logInterval = 10000; // Log position every 10 seconds

void setup(void)
{
  // put your setup code here, to run once:
  pinMode(GPS_SDCardModule_SPI_PIN_CS_D10, OUTPUT);

  // start the SPI library:
  SPI.begin();

  // Initialize the SD card
  if (!sd.begin(GPS_SDCardModule_SPI_PIN_CS_D10, SPI_HALF_SPEED))
  {
    // SD card initialization failed
    while (1);
  }

  // Create a new file on the SD card
  if (!file.open("position_log.txt", O_WRITE | O_CREAT | O_TRUNC))
  {
    // File creation failed
    while (1);
  }

  // Write header to the file
  file.println("Latitude,Longitude");

  // Close the file
  file.close();
}

void loop(void)
{
  // put your main code here, to run repeatedly:

  // Check if it's time to log the position
  if (millis() - lastLogTime >= logInterval)
  {
    // Update the last log time
    lastLogTime = millis();

    // Get the GPS position
    float latitude = getLatitude();
    float longitude = getLongitude();

    // Open the file in append mode
    if (!file.open("position_log.txt", O_WRITE | O_APPEND))
    {
      // File opening failed
      while (1);
    }

    // Write the position to the file
    file.print(latitude);
    file.print(",");
    file.println(longitude);

    // Close the file
    file.close();
  }
}

// Function definition for getLatitude()
float getLatitude()
{
  // Your code to retrieve the latitude from the GPS module
}

// Function definition for getLongitude()
float getLongitude()
{
  // Your code to retrieve the longitude from the GPS module
}