/*
functions associated with the RTC
*/


/************************************************
only needed to default set the time
************************************************/
void set_default_time(tmElements_t tm){
  Serial.println("Setting default time");       // create a bogus time and date
  tm.Hour = 20;
  tm.Minute = 45;
  tm.Second = 0;
  tm.Day = 3;
  tm.Month = 9;
  tm.Year = 2016;
  RTC.write(tm);
}

/************************************************
 returns true if it is am
************************************************/
bool is_am() {
  int hour, minute, second;
  bool ret_val;

  if (RTC.read(tm))
  { // time can be read
    hour = tm.Hour;
    if (hour >= 12)
    {
      hour -= 12;
      ret_val = false;
      //Set am as yellow
    }
    else
    {
      ret_val = true;
    }
  }
  
  return ret_val;
}

/************************************************
 update time
************************************************/
bool update_time()
{
  int hour, minute, second;
  bool ret_val = false;


  if (RTC.read(tm))
  { // time can be read
    hour = tm.Hour;
    if (hour > 12)
    {
      hour -= 12;
      AM = true ;
      //Set am as yellow
    }
    else
    {
      AM = false;
    }

    minute = tm.Minute;
    second = tm.Second;

    Serial.print(hour);   Serial.print(":");
    Serial.print(minute); Serial.print(":");
    Serial.print(second); Serial.println();

    analogWrite(HOURS_PIN,    hour * (255 / 11));
    analogWrite(MINUTES_PIN,  minute * (255 / 59));
    analogWrite(SECONDS_PIN,  second * (255 / 59));
  }
  else
  { // chip is there, but time can't be read, set it to default
    if (RTC.chipPresent())
    {
      Serial.println("Chip found but time not set");
      set_default_time(tm);
      ret_val = true;
    }
    else
    { // we are hosed
      Serial.println("DS1307 read error!  Please check the circuitry.");
      Serial.println();
      ret_val = true;
    }
    delay(1000); // wait 9 seconds and try again
  }
  return ret_val;
}