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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 3 of the License, or
(at your option) any later version.
ChibiOS/RT 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <time.h>
#include <stdlib.h>
#include "ch.h"
#include "hal.h"
/*===========================================================================*/
/* Notes. */
/*===========================================================================*/
/*
This structure is used to hold the values representing a calendar time.
It contains the following members, with the meanings as shown.
int tm_sec seconds after minute [0-61] (61 allows for 2 leap-seconds)
int tm_min minutes after hour [0-59]
int tm_hour hours after midnight [0-23]
int tm_mday day of the month [1-31]
int tm_mon month of year [0-11]
int tm_year current year-1900
int tm_wday days since Sunday [0-6]
int tm_yday days since January 1st [0-365]
int tm_isdst daylight savings indicator (1 = yes, 0 = no, -1 = unknown)
*/
RTCTime timespec;
RTCAlarm alarmspec;
RTCWakeup wakeupspec;
RTCCallbackConfig cb_cfg;
time_t unix_time;
/**
* Alarms callback
*/
static inline void exti_rtcalarm_cb(EXTDriver *extp, expchannel_t channel){
(void)extp;
(void)channel;
if (RTCD1.id_rtc->ISR | RTC_ISR_ALRBF){
RTCD1.id_rtc->ISR &= ~RTC_ISR_ALRBF;
}
if (RTCD1.id_rtc->ISR | RTC_ISR_ALRAF){
RTCD1.id_rtc->ISR &= ~RTC_ISR_ALRAF;
}
palTogglePad(GPIOB, GPIOB_LED_R);
}
/**
* Periodic wakeup callback
*/
static inline void exti_rtcwakeup_cb(EXTDriver *extp, expchannel_t channel){
(void)extp;
(void)channel;
/* manually clear flags because exti driver does not do that */
if (RTCD1.id_rtc->ISR | RTC_ISR_WUTF){
RTCD1.id_rtc->ISR &= ~RTC_ISR_WUTF;
}
palTogglePad(GPIOB, GPIOB_LED_B);
palTogglePad(GPIOB, GPIOB_LED_R);
}
static const EXTConfig extcfg = {
{
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_RISING_EDGE | EXT_CH_MODE_AUTOSTART, exti_rtcalarm_cb},/* RTC alarms */
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},
{EXT_CH_MODE_DISABLED, NULL},/* timestamp */
{EXT_CH_MODE_RISING_EDGE| EXT_CH_MODE_AUTOSTART, exti_rtcwakeup_cb},/* wakeup */
},
EXT_MODE_EXTI(
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0)/* 15 */
};
/**
* Convert from STM32 BCD to classical format.
*/
void bcd2tm(struct tm *timp, uint32_t tv_time, uint32_t tv_date){
timp->tm_isdst = -1;
timp->tm_wday = ((tv_date >> 13) & 0x7);
if(timp->tm_wday == 7)
timp->tm_wday = 0;
timp->tm_mday = (tv_date & 0xF) + ((tv_date >> 4) & 0x3) * 10;
timp->tm_mon = (((tv_date >> 8) & 0xF) + ((tv_date >> 12) & 0x1) * 10) - 1;
timp->tm_year = (((tv_date >> 16)& 0xF) + ((tv_date >> 20) & 0xF) * 10) + 2000 - 1900;
timp->tm_sec = (tv_time & 0xF) + ((tv_time >> 4) & 0x7) * 10;
timp->tm_min = ((tv_time >> 8)& 0xF) + ((tv_time >> 12) & 0x7) * 10;
timp->tm_hour = ((tv_time >> 16)& 0xF) + ((tv_time >> 20) & 0x3) * 10;
}
/**
* Convert from classical format to STM32 BCD
*/
void tm2bcd(struct tm *timp, RTCTime *timespec){
uint32_t v = 0;
timespec->tv_date = 0;
timespec->tv_time = 0;
v = timp->tm_year - 100;
timespec->tv_date |= (((v / 10) & 0xF) << 20) | ((v % 10) << 16);
if (timp->tm_wday == 0)
v = 7;
else
v = timp->tm_wday;
timespec->tv_date |= (v & 7) << 13;
v = timp->tm_mon + 1;
timespec->tv_date |= (((v / 10) & 1) << 12) | ((v % 10) << 8);
v = timp->tm_mday;
timespec->tv_date |= (((v / 10) & 3) << 4) | (v % 10);
v = timp->tm_hour;
timespec->tv_time |= (((v / 10) & 3) << 20) | ((v % 10) << 16);
v = timp->tm_min;
timespec->tv_time |= (((v / 10) & 7) << 12) | ((v % 10) << 8);
v = timp->tm_sec;
timespec->tv_time |= (((v / 10) & 7) << 4) | (v % 10);
}
/**
* Main function.
*/
int main(void){
struct tm timp;
halInit();
chSysInit();
extStart(&EXTD1, &extcfg);
/* tune wakeup callback */
wakeupspec.wakeup = ((uint32_t)4) << 16; /* select 1 Hz clock source */
wakeupspec.wakeup |= 3; /* set counter value to 3. Period will be 3+1 seconds. */
rtcSetWakeup(&RTCD1, &wakeupspec);
/* enable wakeup callback */
cb_cfg.cb_cfg = WAKEUP_CB_FLAG;
rtcSetCallback(&RTCD1, &cb_cfg);
/* get current time in unix format */
rtcGetTime(&RTCD1, ×pec);
bcd2tm(&timp, timespec.tv_time, timespec.tv_date);
unix_time = mktime(&timp);
if (unix_time == -1){/* incorrect time in RTC cell */
unix_time = 1000000000;
}
/* set correct time */
tm2bcd((localtime(&unix_time)), ×pec);
rtcSetTime(&RTCD1, ×pec);
while (TRUE){
rtcGetTime(&RTCD1, ×pec);
bcd2tm(&timp, timespec.tv_time, timespec.tv_date);
unix_time = mktime(&timp);
chThdSleepMilliseconds(1500);
}
return 0;
}
|
