189 lines
6.2 KiB
C
189 lines
6.2 KiB
C
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/*
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* DS3231.h
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*
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* Arduino Library for the DS3231 Real-Time Clock chip
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*
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* (c) Eric Ayars
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* 4/1/11
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* released into the public domain. If you use this, please let me know
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* (just out of pure curiosity!) by sending me an email:
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* eric@ayars.org
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*
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*/
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// Modified by Andy Wickert 5/15/11: Spliced in stuff from RTClib
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// Modified by Simon Gassner 11/28/2017: Changed Term "PM" to "PM_time" for compability with SAMD Processors
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#ifndef DS3231_h
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#define DS3231_h
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// Changed the following to work on 1.0
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//#include "WProgram.h"
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#include <Arduino.h>
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#include <Wire.h>
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// DateTime (get everything at once) from JeeLabs / Adafruit
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// Simple general-purpose date/time class (no TZ / DST / leap second handling!)
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class DateTime {
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public:
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DateTime (uint32_t t =0);
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DateTime (uint16_t year, uint8_t month, uint8_t day,
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uint8_t hour =0, uint8_t min =0, uint8_t sec =0);
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DateTime (const char* date, const char* time);
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uint16_t year() const { return 2000 + yOff; }
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uint8_t month() const { return m; }
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uint8_t day() const { return d; }
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uint8_t hour() const { return hh; }
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uint8_t minute() const { return mm; }
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uint8_t second() const { return ss; }
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uint8_t dayOfTheWeek() const;
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// 32-bit times as seconds since 1/1/2000
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long secondstime() const;
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// 32-bit times as seconds since 1/1/1970
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// THE ABOVE COMMENT IS CORRECT FOR LOCAL TIME; TO USE THIS COMMAND TO
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// OBTAIN TRUE UNIX TIME SINCE EPOCH, YOU MUST CALL THIS COMMAND AFTER
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// SETTING YOUR CLOCK TO UTC
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uint32_t unixtime(void) const;
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protected:
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uint8_t yOff, m, d, hh, mm, ss;
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};
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//checks if a year is a leap year
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bool isleapYear(const uint8_t);
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class RTClib {
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public:
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// Get date and time snapshot
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static DateTime now();
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};
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// Eric's original code is everything below this line
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class DS3231 {
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public:
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//Constructor
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DS3231();
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// Time-retrieval functions
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// the get*() functions retrieve current values of the registers.
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byte getSecond();
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byte getMinute();
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byte getHour(bool& h12, bool& PM_time);
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// In addition to returning the hour register, this function
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// returns the values of the 12/24-hour flag and the AM/PM flag.
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byte getDoW();
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byte getDate();
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byte getMonth(bool& Century);
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// Also sets the flag indicating century roll-over.
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byte getYear();
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// Last 2 digits only
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// Time-setting functions
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// Note that none of these check for sensibility: You can set the
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// date to July 42nd and strange things will probably result.
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void setSecond(byte Second);
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// In addition to setting the seconds, this clears the
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// "Oscillator Stop Flag".
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void setMinute(byte Minute);
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// Sets the minute
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void setHour(byte Hour);
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// Sets the hour
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void setDoW(byte DoW);
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// Sets the Day of the Week (1-7);
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void setDate(byte Date);
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// Sets the Date of the Month
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void setMonth(byte Month);
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// Sets the Month of the year
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void setYear(byte Year);
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// Last two digits of the year
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void setClockMode(bool h12);
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// Set 12/24h mode. True is 12-h, false is 24-hour.
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// Temperature function
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float getTemperature();
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// Alarm functions
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void getA1Time(byte& A1Day, byte& A1Hour, byte& A1Minute, byte& A1Second, byte& AlarmBits, bool& A1Dy, bool& A1h12, bool& A1PM);
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/* Retrieves everything you could want to know about alarm
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* one.
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* A1Dy true makes the alarm go on A1Day = Day of Week,
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* A1Dy false makes the alarm go on A1Day = Date of month.
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*
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* byte AlarmBits sets the behavior of the alarms:
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* Dy A1M4 A1M3 A1M2 A1M1 Rate
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* X 1 1 1 1 Once per second
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* X 1 1 1 0 Alarm when seconds match
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* X 1 1 0 0 Alarm when min, sec match
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* X 1 0 0 0 Alarm when hour, min, sec match
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* 0 0 0 0 0 Alarm when date, h, m, s match
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* 1 0 0 0 0 Alarm when DoW, h, m, s match
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*
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* Dy A2M4 A2M3 A2M2 Rate
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* X 1 1 1 Once per minute (at seconds = 00)
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* X 1 1 0 Alarm when minutes match
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* X 1 0 0 Alarm when hours and minutes match
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* 0 0 0 0 Alarm when date, hour, min match
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* 1 0 0 0 Alarm when DoW, hour, min match
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*/
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void getA2Time(byte& A2Day, byte& A2Hour, byte& A2Minute, byte& AlarmBits, bool& A2Dy, bool& A2h12, bool& A2PM);
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// Same as getA1Time();, but A2 only goes on seconds == 00.
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void setA1Time(byte A1Day, byte A1Hour, byte A1Minute, byte A1Second, byte AlarmBits, bool A1Dy, bool A1h12, bool A1PM);
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// Set the details for Alarm 1
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void setA2Time(byte A2Day, byte A2Hour, byte A2Minute, byte AlarmBits, bool A2Dy, bool A2h12, bool A2PM);
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// Set the details for Alarm 2
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void turnOnAlarm(byte Alarm);
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// Enables alarm 1 or 2 and the external interrupt pin.
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// If Alarm != 1, it assumes Alarm == 2.
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void turnOffAlarm(byte Alarm);
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// Disables alarm 1 or 2 (default is 2 if Alarm != 1);
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// and leaves the interrupt pin alone.
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bool checkAlarmEnabled(byte Alarm);
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// Returns T/F to indicate whether the requested alarm is
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// enabled. Defaults to 2 if Alarm != 1.
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bool checkIfAlarm(byte Alarm);
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// Checks whether the indicated alarm (1 or 2, 2 default);
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// has been activated.
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// Oscillator functions
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void enableOscillator(bool TF, bool battery, byte frequency);
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// turns oscillator on or off. True is on, false is off.
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// if battery is true, turns on even for battery-only operation,
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// otherwise turns off if Vcc is off.
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// frequency must be 0, 1, 2, or 3.
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// 0 = 1 Hz
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// 1 = 1.024 kHz
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// 2 = 4.096 kHz
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// 3 = 8.192 kHz (Default if frequency byte is out of range);
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void enable32kHz(bool TF);
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// Turns the 32kHz output pin on (true); or off (false).
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bool oscillatorCheck();;
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// Checks the status of the OSF (Oscillator Stop Flag);.
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// If this returns false, then the clock is probably not
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// giving you the correct time.
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// The OSF is cleared by function setSecond();.
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private:
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byte decToBcd(byte val);
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// Convert normal decimal numbers to binary coded decimal
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byte bcdToDec(byte val);
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// Convert binary coded decimal to normal decimal numbers
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protected:
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byte readControlByte(bool which);
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// Read selected control byte: (0); reads 0x0e, (1) reads 0x0f
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void writeControlByte(byte control, bool which);
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// Write the selected control byte.
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// which == false -> 0x0e, true->0x0f.
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};
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#endif
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