/*********************************************************************
SCULLCOM Hobby Electronics
10MHz GPS linked Frequency Standard
Software version 1.0v
*********************************************************************/
// LCD RS pin to digital pin 7
// LCD Enable pin to digital pin 8
// LCD D4 pin to digital pin 9
// LCD D5 pin to digital pin 10
// LCD D6 pin to digital pin 11
// LCD D7 pin to digital pin 12
// LCD R/W pin connect to ground

// include the library code:
#include <SoftwareSerial.h>
#include <LiquidCrystal.h>
#include <TinyGPS.h>
 
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // (RS, E, D4, D5, D6, D7)
TinyGPS gps;
SoftwareSerial nss(3, 4);  // TX = 3 and RX = 4
void gpsdump(TinyGPS &gps);
bool feedgps();

void setup()
{
  nss.begin(9600);
  
  lcd.begin(16, 2);
  lcd.print("SCULLCOM");
  lcd.setCursor(0,1);
  lcd.print("Freq Standard");
  delay(3000);
  lcd.clear();

}
void loop()
{
  bool newdata = false;
  unsigned long start = millis();
  while(millis() - start < 1000){
    if (feedgps())
      newdata = true;
  }
  if (newdata)
  { 
    
    lcd.setCursor(0,0);
    
    lcd.print("    Sats :");
    lcd.print(gps.satellites());
    lcd.setCursor(8,1);
    lcd.print("LOCKED  ");
       
  }else{
    lcd.setCursor(0,0);
    lcd.print("No Signal     ");
    lcd.setCursor(8,1);
    lcd.print("UNLOCKED");
  }
  
   lcd.setCursor(0,1);
   lcd.print("10 MHz");
 
}
 
bool feedgps()
{
  while (nss.available())
  {
    if (gps.encode(nss.read()))
      return true;
  }
  return false;
}