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	- Project: GPSTime
	- Source Code compiled for: Arduino Uno
	- Source Code created on: 2023-10-18 20:34:01
	- Source Code generated by: Francesco Alessandro

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

/****** SYSTEM REQUIREMENT 1 *****/
/* Reads NMEA 8bit data from GPS module. Reads hours */
/* minutes, seconds and Display h, m, s on 6x 7seg */
/* LED display. When mins and secs are 00 00, */
/* contact closure for about 1 sec. */

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void displayTime(uint8_t hours, uint8_t minutes, uint8_t seconds);
void triggerContactClosure();

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t contactClosure_PIN_D2 = 2;

/***** DEFINITION OF Software Serial *****/
const uint8_t gpsSerial_PIN_SERIAL_TX_A1 = A1;
const uint8_t gpsSerial_PIN_SERIAL_RX_A0 = A0;
SoftwareSerial gpsSerial(gpsSerial_PIN_SERIAL_RX_A0, gpsSerial_PIN_SERIAL_TX_A1);

/***** DEFINITION OF I2C PINS *****/
const uint8_t display_LCD1602I2C_I2C_PIN_SDA_A4 = A4;
const uint8_t display_LCD1602I2C_I2C_PIN_SCL_A5 = A5;
const uint8_t display_LCD1602I2C_I2C_SLAVE_ADDRESS = 39;

/***** DEFINITION OF LCD DISPLAY *****/
LiquidCrystal_I2C lcd(display_LCD1602I2C_I2C_SLAVE_ADDRESS, 16, 2);

/***** DEFINITION OF NMEA PARSER *****/
MicroNMEA nmea;

void setup(void)
{
  // Initialize digital output pin for contact closure
  pinMode(contactClosure_PIN_D2, OUTPUT);

  // Initialize serial communication with GPS module
  gpsSerial.begin(9600);

  // Initialize I2C communication with LCD display
  Wire.begin();
  lcd.begin(16, 2);
  lcd.backlight();
}

void loop(void)
{
  // Read NMEA data from GPS module
  while (gpsSerial.available()) {
    char c = gpsSerial.read();
    nmea.process(c);
  }

  // Check if a valid fix is available
  if (nmea.isValid()) {
    // Get the hours, minutes, and seconds from the GPS module
    uint8_t hours = nmea.getHour();
    uint8_t minutes = nmea.getMinute();
    uint8_t seconds = nmea.getSecond();

    // Display the time on the LCD display
    displayTime(hours, minutes, seconds);

    // Check if minutes and seconds are both 00
    if (minutes == 0 && seconds == 0) {
      // Trigger the contact closure for about 1 second
      triggerContactClosure();
    }
  }
}

void displayTime(uint8_t hours, uint8_t minutes, uint8_t seconds)
{
  // Clear the LCD display
  lcd.clear();

  // Set the cursor to the first line
  lcd.setCursor(0, 0);

  // Display the hours, minutes, and seconds on the LCD display
  lcd.print("Time: ");
  lcd.print(hours);
  lcd.print(":");
  if (minutes < 10) {
    lcd.print("0");
  }
  lcd.print(minutes);
  lcd.print(":");
  if (seconds < 10) {
    lcd.print("0");
  }
  lcd.print(seconds);
}

void triggerContactClosure()
{
  // Trigger the contact closure for about 1 second
  digitalWrite(contactClosure_PIN_D2, HIGH);
  delay(1000);
  digitalWrite(contactClosure_PIN_D2, LOW);
}