src/main/common/time.h

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #pragma once
  22
  23 #include <stdbool.h>
  24 #include <stdint.h>
  25
  26 #include "platform.h"
  27
  28 #include "pg/pg.h"
  29
  30 // time difference, 32 bits always sufficient
  31 typedef int32_t timeDelta_t;
  32 // millisecond time
  33 typedef uint32_t timeMs_t ;
  34 // microsecond time
  35 #ifdef USE_64BIT_TIME
  36 typedef uint64_t timeUs_t;
  37 #define TIMEUS_MAX UINT64_MAX
  38 #else
  39 typedef uint32_t timeUs_t;
  40 #define TIMEUS_MAX UINT32_MAX
  41 #endif
  42
  43 #define TIMEZONE_OFFSET_MINUTES_MIN -780  // -13 hours
  44 #define TIMEZONE_OFFSET_MINUTES_MAX 780   // +13 hours
  45
  46 #define SECONDS_PER_MINUTE          60.0f
  47
  48 static inline timeDelta_t cmpTimeUs(timeUs_t a, timeUs_t b) { return (timeDelta_t)(a - b); }
  49 static inline int32_t cmpTimeCycles(uint32_t a, uint32_t b) { return (int32_t)(a - b); }
  50
  51 #define FORMATTED_DATE_TIME_BUFSIZE 30
  52
  53 #ifdef USE_RTC_TIME
  54
  55 typedef struct timeConfig_s {
  56     int16_t tz_offsetMinutes; // Offset from UTC in minutes, might be positive or negative
  57 } timeConfig_t;
  58
  59 PG_DECLARE(timeConfig_t, timeConfig);
  60
  61 // Milliseconds since Jan 1 1970
  62 typedef int64_t rtcTime_t;
  63
  64 rtcTime_t rtcTimeMake(int32_t secs, uint16_t millis);
  65 int32_t rtcTimeGetSeconds(const rtcTime_t *t);
  66 uint16_t rtcTimeGetMillis(const rtcTime_t *t);
  67
  68 typedef struct _dateTime_s {
  69     // full year
  70     uint16_t year;
  71     // 1-12
  72     uint8_t month;
  73     // 1-31
  74     uint8_t day;
  75     // 0-23
  76     uint8_t hours;
  77     // 0-59
  78     uint8_t minutes;
  79     // 0-59
  80     uint8_t seconds;
  81     // 0-999
  82     uint16_t millis;
  83 } dateTime_t;
  84
  85 // buf must be at least FORMATTED_DATE_TIME_BUFSIZE
  86 bool dateTimeFormatUTC(char *buf, dateTime_t *dt);
  87 bool dateTimeFormatLocal(char *buf, dateTime_t *dt);
  88 bool dateTimeFormatLocalShort(char *buf, dateTime_t *dt);
  89
  90 void dateTimeUTCToLocal(dateTime_t *utcDateTime, dateTime_t *localDateTime);
  91 // dateTimeSplitFormatted splits a formatted date into its date
  92 // and time parts. Note that the string pointed by formatted will
  93 // be modified and will become invalid after calling this function.
  94 bool dateTimeSplitFormatted(char *formatted, char **date, char **time);
  95
  96 bool rtcHasTime(void);
  97
  98 bool rtcGet(rtcTime_t *t);
  99 bool rtcSet(const rtcTime_t *t);
 100
 101 bool rtcGetDateTime(dateTime_t *dt);
 102 bool rtcSetDateTime(dateTime_t *dt);
 103
 104 void rtcPersistWrite(int16_t offsetMinutes);
 105 bool rtcPersistRead(rtcTime_t *t);
 106
 107 #endif // USE_RTC_TIME