RTC.java

/*
 * $Id$
 *
 * Copyright (C) 2003-2015 JNode.org
 *
 * This library 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 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 library; If not, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package org.jnode.driver.system.cmos.def;

import org.jnode.driver.system.cmos.CMOSConstants;
import org.jnode.driver.system.cmos.CMOSService;
import org.jnode.util.BCDUtils;
import org.jnode.util.TimeUtils;
import org.jnode.vm.RTCService;

/**
 * Real Time Clock
 *
 * @author epr
 */
public class RTC extends RTCService implements CMOSConstants {

    private final CMOSService cmos;

    /**
     * Create a new instance
     *
     * @param cmos the CMOS service
     */
    public RTC(CMOSService cmos) {
        this.cmos = cmos;
    }

    /**
     * Gets the current second
     *
     * @return int
     */
    public int getSeconds() {
        final int control = cmos.getRegister(RTC_CONTROL);
        final int seconds = cmos.getRegister(CMOS_RTC_SECONDS);
        if ((control & RTC_DM_BINARY) != 0) {
            return seconds;
        } else {
            return BCDUtils.bcd2bin(seconds);
        }
    }

    /**
     * Gets the current minute
     *
     * @return int
     */
    public int getMinutes() {
        final int control = cmos.getRegister(RTC_CONTROL);
        final int minutes = cmos.getRegister(CMOS_RTC_MINUTES);
        if ((control & RTC_DM_BINARY) != 0) {
            return minutes;
        } else {
            return BCDUtils.bcd2bin(minutes);
        }
    }

    /**
     * Gets the current hour
     *
     * @return int
     */
    public int getHours() {
        final int control = cmos.getRegister(RTC_CONTROL);
        final int hours = cmos.getRegister(CMOS_RTC_HOURS);
        if ((control & RTC_DM_BINARY) != 0) {
            return hours;
        } else {
            return BCDUtils.bcd2bin(hours);
        }
    }

    /**
     * Gets the current day of the month
     *
     * @return int
     */
    public int getDay() {
        final int control = cmos.getRegister(RTC_CONTROL);
        final int date = cmos.getRegister(CMOS_RTC_DAY_OF_MONTH);
        if ((control & RTC_DM_BINARY) != 0) {
            return date;
        } else {
            return BCDUtils.bcd2bin(date);
        }
    }

    /**
     * Gets the current month
     *
     * @return int
     */
    public int getMonth() {
        final int control = cmos.getRegister(RTC_CONTROL);
        final int month = cmos.getRegister(CMOS_RTC_MONTH);
        if ((control & RTC_DM_BINARY) != 0) {
            return month;
        } else {
            return BCDUtils.bcd2bin(month);
        }
    }

    /**
     * Gets the current year
     *
     * @return int
     */
    public int getYear() {
        final int control = cmos.getRegister(RTC_CONTROL);
        int year = cmos.getRegister(CMOS_RTC_YEAR);
        if ((control & RTC_DM_BINARY) == 0) {
            year = BCDUtils.bcd2bin(year);
        }
        year += 1900;
        if (year < 1970) {
            year += 100;
        }
        return year;
    }

    /**
     * Gets the time calculated from the RTC.
     * This time value can be used as input of Date.
     *
     * @return The time
     * @see java.util.Date#Date(long)
     * @see java.util.Calendar#setTimeInMillis(long)
     */
    public long getTime() {
        return TimeUtils.time2millis(getYear(), getMonth(), getDay(), getHours(), getMinutes(), getSeconds());
    }
}