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50 lines
2.1 KiB
C
50 lines
2.1 KiB
C
#ifndef _Time_h
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#define _Time_h
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#include <Arduino.h>
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#define SECS_PER_MIN ((time_t)(60UL))
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#define SECS_PER_HOUR ((time_t)(3600UL))
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#define SECS_PER_DAY ((time_t)(SECS_PER_HOUR * 24UL))
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#define tmYearToCalendar(Y) ((Y) + 1970) // full four digit year
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// This ugly hack allows us to define C++ overloaded functions, when included
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// from within an extern "C", as newlib's sys/stat.h does. Actually it is
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// intended to include "time.h" from the C library (on ARM, but AVR does not
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// have that file at all). On Mac and Windows, the compiler will find this
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// "Time.h" instead of the C library "time.h", so we may cause other weird
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// and unpredictable effects by conflicting with the C library header "time.h",
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// but at least this hack lets us define C++ functions as intended. Hopefully
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// nothing too terrible will result from overriding the C library header?!
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extern "C++" {
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typedef enum { timeNotSet, timeNeedsSync, timeSet } timeStatus_t;
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typedef struct {
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uint8_t Second;
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uint8_t Minute;
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uint8_t Hour;
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uint8_t Wday; // day of week, sunday is day 1
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uint8_t Day;
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uint8_t Month;
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uint8_t Year; // offset from 1970;
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} tmElements_t, TimeElements, *tmElementsPtr_t;
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typedef time_t (*getExternalTime)();
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time_t now(); // return the current time as seconds since Jan 1 1970
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void setTime(time_t t);
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timeStatus_t timeStatus(); // indicates if time has been set and recently synchronized
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void setSyncProvider(getExternalTime getTimeFunction); // identify the external time provider
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void setSyncInterval(time_t interval); // set the number of seconds between re-sync
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time_t makeTime(const tmElements_t & tm); // convert time elements into time_t
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int hour(time_t t); // the hour for the given time
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int minute(time_t t); // the minute for the given time
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int second(time_t t); // the second for the given time
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int day(time_t t); // the day for the given time
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int month(time_t t); // the month for the given time
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int weekday(time_t t); // the weekday for the given time
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int year(time_t t); // the year for the given time
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}
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#endif
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