blob: 70178efc496bbc90a0c12d01196fc256fa8ae485 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/***************************************************************************
* __________ __ ___.
* 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 in that it at least triggers INT_RTC. I am guessing
* that the OF bootloader for the Gigabeat detects the startup by alarm and shuts down.
* This code is available for use once the OF bootloader is no longer required.
*/
/* check whether the unit has been started by the RTC alarm function
* This code has not been written/checked for the gigabeat
*/
bool rtc_check_alarm_started(bool release_alarm)
{
static bool alarm_state, run_before;
bool rc;
if (run_before) {
rc = alarm_state;
alarm_state &= ~release_alarm;
} else {
/* This call resets AF, so we store the state for later recall */
rc = alarm_state = rtc_check_alarm_flag();
run_before = true;
}
return rc;
}
/*
* I don't think this matters on the gigabeat, it seems designed to shut off the alarm in the
* event one happens while the player is running. This does not cause any problems on the
* gigabeat as the interupt is recieved (if not masked) and ignored.
*/
bool rtc_check_alarm_flag(void)
{
return false;
}
/* 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;
INTMSK&=~(1<<30);
}
else
{
RTCALM=0x00;
INTMSK|=(1<<30);
}
return false; /* all ok */
}
#endif
|
