/elec/propeller-clock

/*

 * time.cc

 *

 * Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.

 *

 * This file is part of propeller-clock (hereafter referred to as "this

 * program"). See http://ed.am/dev/software/arduino/propeller-clock for more

 * information.

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published

 * by the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "time.h"

#include <DS1307.h>

#include <Wire.h>

Time &Time::get_instance()

{

	static Time time;

	return time;

}

int Time::get_hours()

{

	return _hours;

}

int Time::get_minutes()

{

	return _minutes;

}

int Time::get_seconds()

{

	return _seconds;

}

void Time::update()

{

	// how many milliseonds have elapsed since we last checked?

	unsigned long millis = ::millis();

	unsigned long delta = millis - _last_millis + _carry;

	// update the previous time and carried-over milliseconds

	_last_millis = millis;

	_carry = delta % 1000;

	// add the seconds that have passed to the time

	_seconds += delta / 1000;

	while( _seconds >= 60 ) {

		_seconds -= 60;

		_minutes++;

		if( _minutes >= 60 ) {

			_minutes -= 60;

			_hours++;

			if( _hours >= 24 )

				_hours -= 24;

		}

	}

}

Time::Time()

	:

	_last_millis( millis() ),

	_carry( 0 )

{

	// get the time from the real-time clock

	int rtc_data[ 7 ];

	RTC.get( rtc_data, true );

	_hours = rtc_data[ DS1307_HR ];

	_minutes = rtc_data[ DS1307_MIN ];

	_seconds = rtc_data[ DS1307_SEC ];

}