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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "i2c.h"
#include "rtc.h"
#include "kernel.h"
#include "system.h"
void rtc_init(void)
{
/* RTC Enable */
RTCCON |= 1;
}
int rtc_read_datetime(unsigned char* buf)
{
buf[0] = BCDSEC;
buf[1] = BCDMIN;
buf[2] = BCDHOUR;
buf[3] = BCDDAY-1; /* timefuncs wants 0..6 for wday */
buf[4] = BCDDATE;
buf[5] = BCDMON;
buf[6] = BCDYEAR;
return 1;
}
int rtc_write_datetime(unsigned char* buf)
{
BCDSEC = buf[0];
BCDMIN = buf[1];
BCDHOUR = buf[2];
BCDDAY = buf[3]+1; /* chip wants 1..7 for wday */
BCDDATE = buf[4];
BCDMON = buf[5];
BCDYEAR = buf[6];
return 1;
}
#ifdef HAVE_RTC_ALARM
/* This alarm code works with a flashed bootloader. This will not work with
* the OF bootloader.
*/
/* Check whether the unit has been started by the RTC alarm function */
bool rtc_check_alarm_started(bool release_alarm)
{
if (GSTATUS3)
{
GSTATUS3 &= ~release_alarm;
return true;
}
else
{
return false;
}
}
/* Check to see if the alarm has flaged since the last it was checked */
bool rtc_check_alarm_flag(void)
{
bool ret=SRCPND & 0x40000000;
SRCPND=RTC_MASK;
return ret;
}
/* set alarm time registers to the given time (repeat once per day) */
void rtc_set_alarm(int h, int m)
{
ALMMIN=(((m / 10) << 4) | (m % 10)) & 0x7f; /* minutes */
ALMHOUR=(((h / 10) << 4) | (h % 10)) & 0x3f; /* hour */
}
/* read out the current alarm time */
void rtc_get_alarm(int *h, int *m)
{
*m=((ALMMIN & 0x70) >> 4) * 10 + (ALMMIN & 0x0f);
*h=((ALMHOUR & 0x30) >> 4) * 10 + (ALMHOUR & 0x0f);
}
/* turn alarm on or off by setting the alarm flag enable
* returns false if alarm was set and alarm flag (output) is off
*/
bool rtc_enable_alarm(bool enable)
{
if (enable)
{
RTCALM=0x46;
}
else
{
RTCALM=0x00;
}
return false; /* all ok */
}
#endif
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