aboutsummaryrefslogtreecommitdiffstats
path: root/os/various/chrtclib.c
blob: 1a0a5487da55bf74abfadc9a527fe0411a599fd8 (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
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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
/*
    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/>.
*/
/*
   Concepts and parts of this file have been contributed by Uladzimir Pylinsky
   aka barthess.
 */

/**
 * @file    chrtclib.c
 * @brief   RTC time conversion utilities code.
 *
 * @addtogroup chrtclib
 * @{
 */

#include <time.h>

#include "ch.h"
#include "hal.h"

#include "chrtclib.h"

#if (defined(STM32F4XX) || defined(STM32F2XX) || defined(STM32L1XX) || \
     defined(STM32F1XX) || defined(STM32F10X_MD) || defined(STM32F10X_LD) || \
     defined(STM32F10X_HD) || defined(__DOXYGEN__))
#if STM32_RTC_IS_CALENDAR
/**
 * @brief   Converts from STM32 BCD to canonicalized time format.
 *
 * @param[out] timp     pointer to a @p tm structure as defined in time.h
 * @param[in] timespec  pointer to a @p RTCTime structure
 *
 * @notapi
 */
static void stm32_rtc_bcd2tm(struct tm *timp, RTCTime *timespec) {
  uint32_t tv_time = timespec->tv_time;
  uint32_t tv_date = timespec->tv_date;

#if CH_DBG_ENABLE_CHECKS
  timp->tm_isdst = 0;
  timp->tm_wday  = 0;
  timp->tm_mday  = 0;
  timp->tm_yday  = 0;
  timp->tm_mon   = 0;
  timp->tm_year  = 0;
  timp->tm_sec   = 0;
  timp->tm_min   = 0;
  timp->tm_hour  = 0;
#endif

  timp->tm_isdst = -1;

  timp->tm_wday = (tv_date & RTC_DR_WDU) >> RTC_DR_WDU_OFFSET;
  if (timp->tm_wday == 7)
    timp->tm_wday = 0;

  timp->tm_mday =  (tv_date & RTC_DR_DU) >> RTC_DR_DU_OFFSET;
  timp->tm_mday += ((tv_date & RTC_DR_DT) >> RTC_DR_DT_OFFSET) * 10;

  timp->tm_mon  =  (tv_date & RTC_DR_MU) >> RTC_DR_MU_OFFSET;
  timp->tm_mon  += ((tv_date & RTC_DR_MT) >> RTC_DR_MT_OFFSET) * 10;
  timp->tm_mon  -= 1;

  timp->tm_year =  (tv_date & RTC_DR_YU) >> RTC_DR_YU_OFFSET;
  timp->tm_year += ((tv_date & RTC_DR_YT) >> RTC_DR_YT_OFFSET) * 10;
  timp->tm_year += 2000 - 1900;

  timp->tm_sec  =  (tv_time & RTC_TR_SU) >> RTC_TR_SU_OFFSET;
  timp->tm_sec  += ((tv_time & RTC_TR_ST) >> RTC_TR_ST_OFFSET) * 10;

  timp->tm_min  =  (tv_time & RTC_TR_MNU) >> RTC_TR_MNU_OFFSET;
  timp->tm_min  += ((tv_time & RTC_TR_MNT) >> RTC_TR_MNT_OFFSET) * 10;

  timp->tm_hour =  (tv_time & RTC_TR_HU) >> RTC_TR_HU_OFFSET;
  timp->tm_hour += ((tv_time & RTC_TR_HT) >> RTC_TR_HT_OFFSET) * 10;
  timp->tm_hour += 12 * ((tv_time & RTC_TR_PM) >> RTC_TR_PM_OFFSET);
}

/**
 * @brief   Converts from canonicalized to STM32 BCD time format.
 *
 * @param[in] timp      pointer to a @p tm structure as defined in time.h
 * @param[out] timespec pointer to a @p RTCTime structure
 *
 * @notapi
 */
static void stm32_rtc_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) << RTC_DR_YT_OFFSET) & RTC_DR_YT;
  timespec->tv_date |= (v % 10) << RTC_DR_YU_OFFSET;

  if (timp->tm_wday == 0)
    v = 7;
  else
    v = timp->tm_wday;
  timespec->tv_date |= (v << RTC_DR_WDU_OFFSET) & RTC_DR_WDU;

  v = timp->tm_mon + 1;
  timespec->tv_date |= ((v / 10) << RTC_DR_MT_OFFSET) & RTC_DR_MT;
  timespec->tv_date |= (v % 10) << RTC_DR_MU_OFFSET;

  v = timp->tm_mday;
  timespec->tv_date |= ((v / 10) << RTC_DR_DT_OFFSET) & RTC_DR_DT;
  timespec->tv_date |= (v % 10) << RTC_DR_DU_OFFSET;

  v = timp->tm_hour;
  timespec->tv_time |= ((v / 10) << RTC_TR_HT_OFFSET) & RTC_TR_HT;
  timespec->tv_time |= (v % 10) << RTC_TR_HU_OFFSET;

  v = timp->tm_min;
  timespec->tv_time |= ((v / 10) << RTC_TR_MNT_OFFSET) & RTC_TR_MNT;
  timespec->tv_time |= (v % 10) << RTC_TR_MNU_OFFSET;

  v = timp->tm_sec;
  timespec->tv_time |= ((v / 10) << RTC_TR_ST_OFFSET) & RTC_TR_ST;
  timespec->tv_time |= (v % 10) << RTC_TR_SU_OFFSET;
}

/**
 * @brief   Gets raw time from RTC and converts it to canonicalized format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[out] timp     pointer to a @p tm structure as defined in time.h
 *
 * @api
 */
void rtcGetTimeTm(RTCDriver *rtcp, struct tm *timp) {
#if STM32_RTC_HAS_SUBSECONDS
  RTCTime timespec = {0,0,FALSE,0};
#else
  RTCTime timespec = {0,0,FALSE};
#endif

  rtcGetTime(rtcp, &timespec);
  stm32_rtc_bcd2tm(timp, &timespec);
}

/**
 * @brief   Sets RTC time.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[out] timp     pointer to a @p tm structure as defined in time.h
 *
 * @api
 */
void rtcSetTimeTm(RTCDriver *rtcp, struct tm *timp) {
#if STM32_RTC_HAS_SUBSECONDS
  RTCTime timespec = {0,0,FALSE,0};
#else
  RTCTime timespec = {0,0,FALSE};
#endif

  stm32_rtc_tm2bcd(timp, &timespec);
  rtcSetTime(rtcp, &timespec);
}

/**
 * @brief   Gets raw time from RTC and converts it to unix format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @return              Unix time value in seconds.
 *
 * @api
 */
time_t rtcGetTimeUnixSec(RTCDriver *rtcp) {
#if STM32_RTC_HAS_SUBSECONDS
  RTCTime timespec = {0,0,FALSE,0};
#else
  RTCTime timespec = {0,0,FALSE};
#endif
  struct tm timp;

  rtcGetTime(rtcp, &timespec);
  stm32_rtc_bcd2tm(&timp, &timespec);

  return mktime(&timp);
}

/**
 * @brief   Sets RTC time.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[in] tv_sec    time specification
 * @return              Unix time value in seconds.
 *
 * @api
 */
void rtcSetTimeUnixSec(RTCDriver *rtcp, time_t tv_sec) {
#if STM32_RTC_HAS_SUBSECONDS
  RTCTime timespec = {0,0,FALSE,0};
#else
  RTCTime timespec = {0,0,FALSE};
#endif

  stm32_rtc_tm2bcd(localtime(&tv_sec), &timespec);
  rtcSetTime(rtcp, &timespec);
}

/**
 * @brief   Gets raw time from RTC and converts it to unix format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @return              Unix time value in microseconds.
 *
 * @api
 */
uint64_t rtcGetTimeUnixUsec(RTCDriver *rtcp) {
#if STM32_RTC_HAS_SUBSECONDS
  uint64_t result = 0;
  RTCTime timespec = {0,0,FALSE,0};
  struct tm timp;

  rtcGetTime(rtcp, &timespec);
  stm32_rtc_bcd2tm(&timp, &timespec);

  result = (uint64_t)mktime(&timp) * 1000000;
  return result + timespec.tv_msec * 1000;
#else
  return (uint64_t)rtcGetTimeUnixSec(rtcp) * 1000000;
#endif
}

#else /* STM32_RTC_IS_CALENDAR */
/**
 * @brief   Gets raw time from RTC and converts it to canonicalized format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[out] timp     pointer to a @p tm structure as defined in time.h
 *
 * @api
 */
void rtcGetTimeTm(RTCDriver *rtcp, struct tm *timp) {
  RTCTime timespec = {0,0};

  rtcGetTime(rtcp, &timespec);
  if (timp != NULL) /* this comparison needed to avoid compiler warning */
    timp = localtime((time_t *)&(timespec.tv_sec));
}

/**
 * @brief   Sets RTC time.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[out] timp     pointer to a @p tm structure as defined in time.h
 *
 * @api
 */
void rtcSetTimeTm(RTCDriver *rtcp, struct tm *timp) {
  RTCTime timespec = {0,0};

  timespec.tv_sec = mktime(timp);
  timespec.tv_msec = 0;
  rtcSetTime(rtcp, &timespec);
}

/**
 * @brief   Gets raw time from RTC and converts it to unix format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @return              Unix time value in seconds.
 *
 * @api
 */
time_t rtcGetTimeUnixSec(RTCDriver *rtcp) {
  RTCTime timespec = {0,0};

  rtcGetTime(rtcp, &timespec);
  return timespec.tv_sec;
}

/**
 * @brief   Sets RTC time.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @param[in] tv_sec    time specification
 * @return              Unix time value in seconds.
 *
 * @api
 */
void rtcSetTimeUnixSec(RTCDriver *rtcp, time_t tv_sec) {
  RTCTime timespec = {0,0};

  timespec.tv_sec = tv_sec;
  timespec.tv_msec = 0;
  rtcSetTime(rtcp, &timespec);
}

/**
 * @brief   Gets raw time from RTC and converts it to unix format.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @return              Unix time value in microseconds.
 *
 * @api
 */
uint64_t rtcGetTimeUnixUsec(RTCDriver *rtcp) {
#if STM32_RTC_HAS_SUBSECONDS
  uint64_t result = 0;
  RTCTime timespec = {0,0};

  rtcGetTime(rtcp, &timespec);
  result = (uint64_t)timespec.tv_sec * 1000000;
  return result + timespec.tv_msec * 1000;
#else
  return (uint64_t)rtcGetTimeUnixSec(rtcp) * 1000000;
#endif
}
#endif /* STM32_RTC_IS_CALENDAR */
#endif /* (defined(STM32F4XX) || defined(STM32F2XX) || defined(STM32L1XX) || defined(STM32F1XX)) */

/**
 * @brief   Get current time in format suitable for usage in FatFS.
 *
 * @param[in] rtcp      pointer to RTC driver structure
 * @return              FAT time value.
 *
 * @api
 */
uint32_t rtcGetTimeFat(RTCDriver *rtcp) {
  uint32_t fattime = 0;
  struct tm *timp = NULL;

  rtcGetTimeTm(rtcp, timp);

  fattime |= (timp->tm_sec / 2);
  fattime |= (timp->tm_min) << 5;
  fattime |= (timp->tm_hour) << 11;
  fattime |= (timp->tm_mday) << 16;
  fattime |= (timp->tm_mon + 1) << 21;
  fattime |= (timp->tm_year - 80) << 25;
  return fattime;
}

/** @} */