173b611921
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13346 a1c6a512-1295-4272-9138-f99709370657
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "i2c.h"
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#include "rtc.h"
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#include "kernel.h"
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#include "system.h"
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void rtc_init(void)
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{
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/* RTC Enable */
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RTCCON |= 1;
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}
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int rtc_read_datetime(unsigned char* buf)
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{
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buf[0] = BCDSEC;
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buf[1] = BCDMIN;
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buf[2] = BCDHOUR;
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buf[3] = BCDDAY;
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buf[4] = BCDDATE;
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buf[5] = BCDMON;
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buf[6] = BCDYEAR;
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return 1;
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}
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int rtc_write_datetime(unsigned char* buf)
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{
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BCDSEC = buf[0];
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BCDMIN = buf[1];
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BCDHOUR = buf[2];
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BCDDAY = buf[3];
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BCDDATE = buf[4];
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BCDMON = buf[5];
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BCDYEAR = buf[6];
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return 1;
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}
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#ifdef HAVE_RTC_ALARM
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/* This alarm code works in that it at least triggers INT_RTC. I am guessing
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* that the OF bootloader for the Gigabeat detects the startup by alarm and shuts down.
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* This code is available for use once the OF bootloader is no longer required.
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*/
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/* check whether the unit has been started by the RTC alarm function
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* This code has not been written/checked for the gigabeat
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*/
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bool rtc_check_alarm_started(bool release_alarm)
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{
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static bool alarm_state, run_before;
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bool rc;
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if (run_before) {
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rc = alarm_state;
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alarm_state &= ~release_alarm;
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} else {
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/* This call resets AF, so we store the state for later recall */
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rc = alarm_state = rtc_check_alarm_flag();
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run_before = true;
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}
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return rc;
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}
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/*
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* I don't think this matters on the gigabeat, it seems designed to shut off the alarm in the
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* event one happens while the player is running. This does not cause any problems on the
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* gigabeat as the interupt is recieved (if not masked) and ignored.
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*/
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bool rtc_check_alarm_flag(void)
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{
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return false;
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}
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/* set alarm time registers to the given time (repeat once per day) */
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void rtc_set_alarm(int h, int m)
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{
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ALMMIN=(((m / 10) << 4) | (m % 10)) & 0x7f; /* minutes */
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ALMHOUR=(((h / 10) << 4) | (h % 10)) & 0x3f; /* hour */
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}
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/* read out the current alarm time */
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void rtc_get_alarm(int *h, int *m)
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{
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*m=((ALMMIN & 0x70) >> 4) * 10 + (ALMMIN & 0x0f);
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*h=((ALMHOUR & 0x30) >> 4) * 10 + (ALMHOUR & 0x0f);
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}
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/* turn alarm on or off by setting the alarm flag enable
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* returns false if alarm was set and alarm flag (output) is off
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*/
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bool rtc_enable_alarm(bool enable)
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{
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if (enable)
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{
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RTCALM=0x46;
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INTMSK&=~(1<<30);
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}
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else
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{
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RTCALM=0x00;
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INTMSK|=(1<<30);
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}
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return false; /* all ok */
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}
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#endif
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