506 lines
14 KiB
C++
506 lines
14 KiB
C++
// Code by JeeLabs http://news.jeelabs.org/code/
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// Released to the public domain! Enjoy!
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#include <Wire.h>
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#include "RTClib.h"
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#ifdef __AVR__
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#include <avr/pgmspace.h>
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#elif defined(ESP8266)
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#include <pgmspace.h>
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#elif defined(ARDUINO_ARCH_SAMD)
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// nothing special needed
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#elif defined(ARDUINO_SAM_DUE)
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#define PROGMEM
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#define pgm_read_byte(addr) (*(const unsigned char *)(addr))
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#define Wire Wire1
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#endif
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#if (ARDUINO >= 100)
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#include <Arduino.h> // capital A so it is error prone on case-sensitive filesystems
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// Macro to deal with the difference in I2C write functions from old and new Arduino versions.
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#define _I2C_WRITE write
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#define _I2C_READ read
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#else
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#include <WProgram.h>
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#define _I2C_WRITE send
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#define _I2C_READ receive
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#endif
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static uint8_t read_i2c_register(uint8_t addr, uint8_t reg) {
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Wire.beginTransmission(addr);
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Wire._I2C_WRITE((byte)reg);
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Wire.endTransmission();
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Wire.requestFrom(addr, (byte)1);
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return Wire._I2C_READ();
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}
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static void write_i2c_register(uint8_t addr, uint8_t reg, uint8_t val) {
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Wire.beginTransmission(addr);
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Wire._I2C_WRITE((byte)reg);
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Wire._I2C_WRITE((byte)val);
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Wire.endTransmission();
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}
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////////////////////////////////////////////////////////////////////////////////
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// utility code, some of this could be exposed in the DateTime API if needed
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const uint8_t daysInMonth [] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 };
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// number of days since 2000/01/01, valid for 2001..2099
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static uint16_t date2days(uint16_t y, uint8_t m, uint8_t d) {
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if (y >= 2000)
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y -= 2000;
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uint16_t days = d;
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for (uint8_t i = 1; i < m; ++i)
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days += pgm_read_byte(daysInMonth + i - 1);
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if (m > 2 && y % 4 == 0)
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++days;
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return days + 365 * y + (y + 3) / 4 - 1;
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}
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static long time2long(uint16_t days, uint8_t h, uint8_t m, uint8_t s) {
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return ((days * 24L + h) * 60 + m) * 60 + s;
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}
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////////////////////////////////////////////////////////////////////////////////
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// DateTime implementation - ignores time zones and DST changes
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// NOTE: also ignores leap seconds, see http://en.wikipedia.org/wiki/Leap_second
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DateTime::DateTime (uint32_t t) {
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t -= SECONDS_FROM_1970_TO_2000; // bring to 2000 timestamp from 1970
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ss = t % 60;
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t /= 60;
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mm = t % 60;
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t /= 60;
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hh = t % 24;
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uint16_t days = t / 24;
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uint8_t leap;
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for (yOff = 0; ; ++yOff) {
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leap = yOff % 4 == 0;
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if (days < 365 + leap)
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break;
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days -= 365 + leap;
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}
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for (m = 1; ; ++m) {
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uint8_t daysPerMonth = pgm_read_byte(daysInMonth + m - 1);
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if (leap && m == 2)
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++daysPerMonth;
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if (days < daysPerMonth)
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break;
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days -= daysPerMonth;
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}
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d = days + 1;
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}
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DateTime::DateTime (uint16_t year, uint8_t month, uint8_t day, uint8_t hour, uint8_t min, uint8_t sec) {
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if (year >= 2000)
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year -= 2000;
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yOff = year;
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m = month;
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d = day;
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hh = hour;
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mm = min;
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ss = sec;
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}
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DateTime::DateTime (const DateTime& copy):
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yOff(copy.yOff),
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m(copy.m),
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d(copy.d),
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hh(copy.hh),
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mm(copy.mm),
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ss(copy.ss)
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{}
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static uint8_t conv2d(const char* p) {
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uint8_t v = 0;
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if ('0' <= *p && *p <= '9')
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v = *p - '0';
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return 10 * v + *++p - '0';
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}
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// A convenient constructor for using "the compiler's time":
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// DateTime now (__DATE__, __TIME__);
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// NOTE: using F() would further reduce the RAM footprint, see below.
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DateTime::DateTime (const char* date, const char* time) {
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// sample input: date = "Dec 26 2009", time = "12:34:56"
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yOff = conv2d(date + 9);
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// Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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switch (date[0]) {
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case 'J': m = (date[1] == 'a') ? 1 : ((date[2] == 'n') ? 6 : 7); break;
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case 'F': m = 2; break;
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case 'A': m = date[2] == 'r' ? 4 : 8; break;
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case 'M': m = date[2] == 'r' ? 3 : 5; break;
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case 'S': m = 9; break;
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case 'O': m = 10; break;
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case 'N': m = 11; break;
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case 'D': m = 12; break;
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}
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d = conv2d(date + 4);
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hh = conv2d(time);
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mm = conv2d(time + 3);
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ss = conv2d(time + 6);
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}
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// A convenient constructor for using "the compiler's time":
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// This version will save RAM by using PROGMEM to store it by using the F macro.
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// DateTime now (F(__DATE__), F(__TIME__));
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DateTime::DateTime (const __FlashStringHelper* date, const __FlashStringHelper* time) {
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// sample input: date = "Dec 26 2009", time = "12:34:56"
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char buff[11];
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memcpy_P(buff, date, 11);
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yOff = conv2d(buff + 9);
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// Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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switch (buff[0]) {
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case 'J': m = (buff[1] == 'a') ? 1 : ((buff[2] == 'n') ? 6 : 7); break;
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case 'F': m = 2; break;
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case 'A': m = buff[2] == 'r' ? 4 : 8; break;
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case 'M': m = buff[2] == 'r' ? 3 : 5; break;
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case 'S': m = 9; break;
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case 'O': m = 10; break;
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case 'N': m = 11; break;
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case 'D': m = 12; break;
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}
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d = conv2d(buff + 4);
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memcpy_P(buff, time, 8);
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hh = conv2d(buff);
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mm = conv2d(buff + 3);
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ss = conv2d(buff + 6);
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}
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uint8_t DateTime::dayOfTheWeek() const {
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uint16_t day = date2days(yOff, m, d);
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return (day + 6) % 7; // Jan 1, 2000 is a Saturday, i.e. returns 6
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}
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uint32_t DateTime::unixtime(void) const {
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uint32_t t;
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uint16_t days = date2days(yOff, m, d);
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t = time2long(days, hh, mm, ss);
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t += SECONDS_FROM_1970_TO_2000; // seconds from 1970 to 2000
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return t;
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}
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long DateTime::secondstime(void) const {
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long t;
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uint16_t days = date2days(yOff, m, d);
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t = time2long(days, hh, mm, ss);
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return t;
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}
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DateTime DateTime::operator+(const TimeSpan& span) {
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return DateTime(unixtime()+span.totalseconds());
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}
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DateTime DateTime::operator-(const TimeSpan& span) {
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return DateTime(unixtime()-span.totalseconds());
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}
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TimeSpan DateTime::operator-(const DateTime& right) {
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return TimeSpan(unixtime()-right.unixtime());
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}
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////////////////////////////////////////////////////////////////////////////////
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// TimeSpan implementation
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TimeSpan::TimeSpan (int32_t seconds):
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_seconds(seconds)
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{}
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TimeSpan::TimeSpan (int16_t days, int8_t hours, int8_t minutes, int8_t seconds):
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_seconds((int32_t)days*86400L + (int32_t)hours*3600 + (int32_t)minutes*60 + seconds)
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{}
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TimeSpan::TimeSpan (const TimeSpan& copy):
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_seconds(copy._seconds)
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{}
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TimeSpan TimeSpan::operator+(const TimeSpan& right) {
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return TimeSpan(_seconds+right._seconds);
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}
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TimeSpan TimeSpan::operator-(const TimeSpan& right) {
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return TimeSpan(_seconds-right._seconds);
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}
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////////////////////////////////////////////////////////////////////////////////
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// RTC_DS1307 implementation
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static uint8_t bcd2bin (uint8_t val) { return val - 6 * (val >> 4); }
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static uint8_t bin2bcd (uint8_t val) { return val + 6 * (val / 10); }
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boolean RTC_DS1307::begin(void) {
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Wire.begin();
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return true;
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}
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uint8_t RTC_DS1307::isrunning(void) {
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE((byte)0);
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Wire.endTransmission();
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Wire.requestFrom(DS1307_ADDRESS, 1);
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uint8_t ss = Wire._I2C_READ();
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return !(ss>>7);
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}
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void RTC_DS1307::adjust(const DateTime& dt) {
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE((byte)0); // start at location 0
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Wire._I2C_WRITE(bin2bcd(dt.second()));
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Wire._I2C_WRITE(bin2bcd(dt.minute()));
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Wire._I2C_WRITE(bin2bcd(dt.hour()));
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Wire._I2C_WRITE(bin2bcd(0));
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Wire._I2C_WRITE(bin2bcd(dt.day()));
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Wire._I2C_WRITE(bin2bcd(dt.month()));
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Wire._I2C_WRITE(bin2bcd(dt.year() - 2000));
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Wire.endTransmission();
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}
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DateTime RTC_DS1307::now() {
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE((byte)0);
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Wire.endTransmission();
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Wire.requestFrom(DS1307_ADDRESS, 7);
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uint8_t ss = bcd2bin(Wire._I2C_READ() & 0x7F);
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uint8_t mm = bcd2bin(Wire._I2C_READ());
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uint8_t hh = bcd2bin(Wire._I2C_READ());
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Wire._I2C_READ();
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uint8_t d = bcd2bin(Wire._I2C_READ());
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uint8_t m = bcd2bin(Wire._I2C_READ());
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uint16_t y = bcd2bin(Wire._I2C_READ()) + 2000;
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return DateTime (y, m, d, hh, mm, ss);
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}
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Ds1307SqwPinMode RTC_DS1307::readSqwPinMode() {
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int mode;
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE(DS1307_CONTROL);
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Wire.endTransmission();
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Wire.requestFrom((uint8_t)DS1307_ADDRESS, (uint8_t)1);
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mode = Wire._I2C_READ();
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mode &= 0x93;
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return static_cast<Ds1307SqwPinMode>(mode);
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}
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void RTC_DS1307::writeSqwPinMode(Ds1307SqwPinMode mode) {
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE(DS1307_CONTROL);
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Wire._I2C_WRITE(mode);
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Wire.endTransmission();
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}
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void RTC_DS1307::readnvram(uint8_t* buf, uint8_t size, uint8_t address) {
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int addrByte = DS1307_NVRAM + address;
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE(addrByte);
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Wire.endTransmission();
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Wire.requestFrom((uint8_t) DS1307_ADDRESS, size);
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for (uint8_t pos = 0; pos < size; ++pos) {
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buf[pos] = Wire._I2C_READ();
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}
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}
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void RTC_DS1307::writenvram(uint8_t address, uint8_t* buf, uint8_t size) {
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int addrByte = DS1307_NVRAM + address;
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Wire.beginTransmission(DS1307_ADDRESS);
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Wire._I2C_WRITE(addrByte);
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for (uint8_t pos = 0; pos < size; ++pos) {
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Wire._I2C_WRITE(buf[pos]);
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}
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Wire.endTransmission();
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}
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uint8_t RTC_DS1307::readnvram(uint8_t address) {
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uint8_t data;
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readnvram(&data, 1, address);
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return data;
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}
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void RTC_DS1307::writenvram(uint8_t address, uint8_t data) {
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writenvram(address, &data, 1);
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}
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////////////////////////////////////////////////////////////////////////////////
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// RTC_Millis implementation
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long RTC_Millis::offset = 0;
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void RTC_Millis::adjust(const DateTime& dt) {
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offset = dt.unixtime() - millis() / 1000;
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}
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DateTime RTC_Millis::now() {
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return (uint32_t)(offset + millis() / 1000);
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}
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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// RTC_PCF8563 implementation
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boolean RTC_PCF8523::begin(void) {
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Wire.begin();
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return true;
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}
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boolean RTC_PCF8523::initialized(void) {
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE((byte)PCF8523_CONTROL_3);
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Wire.endTransmission();
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Wire.requestFrom(PCF8523_ADDRESS, 1);
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uint8_t ss = Wire._I2C_READ();
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return ((ss & 0xE0) != 0xE0);
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}
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void RTC_PCF8523::adjust(const DateTime& dt) {
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE((byte)3); // start at location 3
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Wire._I2C_WRITE(bin2bcd(dt.second()));
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Wire._I2C_WRITE(bin2bcd(dt.minute()));
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Wire._I2C_WRITE(bin2bcd(dt.hour()));
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Wire._I2C_WRITE(bin2bcd(dt.day()));
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Wire._I2C_WRITE(bin2bcd(0)); // skip weekdays
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Wire._I2C_WRITE(bin2bcd(dt.month()));
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Wire._I2C_WRITE(bin2bcd(dt.year() - 2000));
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Wire.endTransmission();
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// set to battery switchover mode
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE((byte)PCF8523_CONTROL_3);
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Wire._I2C_WRITE((byte)0x00);
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Wire.endTransmission();
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}
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DateTime RTC_PCF8523::now() {
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE((byte)3);
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Wire.endTransmission();
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Wire.requestFrom(PCF8523_ADDRESS, 7);
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uint8_t ss = bcd2bin(Wire._I2C_READ() & 0x7F);
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uint8_t mm = bcd2bin(Wire._I2C_READ());
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uint8_t hh = bcd2bin(Wire._I2C_READ());
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uint8_t d = bcd2bin(Wire._I2C_READ());
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Wire._I2C_READ(); // skip 'weekdays'
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uint8_t m = bcd2bin(Wire._I2C_READ());
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uint16_t y = bcd2bin(Wire._I2C_READ()) + 2000;
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return DateTime (y, m, d, hh, mm, ss);
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}
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Pcf8523SqwPinMode RTC_PCF8523::readSqwPinMode() {
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int mode;
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE(PCF8523_CLKOUTCONTROL);
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Wire.endTransmission();
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Wire.requestFrom((uint8_t)PCF8523_ADDRESS, (uint8_t)1);
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mode = Wire._I2C_READ();
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mode >>= 3;
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mode &= 0x7;
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return static_cast<Pcf8523SqwPinMode>(mode);
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}
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void RTC_PCF8523::writeSqwPinMode(Pcf8523SqwPinMode mode) {
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Wire.beginTransmission(PCF8523_ADDRESS);
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Wire._I2C_WRITE(PCF8523_CLKOUTCONTROL);
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Wire._I2C_WRITE(mode << 3);
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Wire.endTransmission();
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}
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////////////////////////////////////////////////////////////////////////////////
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// RTC_DS3231 implementation
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boolean RTC_DS3231::begin(void) {
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Wire.begin();
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return true;
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}
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bool RTC_DS3231::lostPower(void) {
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return (read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG) >> 7);
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}
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void RTC_DS3231::adjust(const DateTime& dt) {
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Wire.beginTransmission(DS3231_ADDRESS);
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Wire._I2C_WRITE((byte)0); // start at location 0
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Wire._I2C_WRITE(bin2bcd(dt.second()));
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Wire._I2C_WRITE(bin2bcd(dt.minute()));
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Wire._I2C_WRITE(bin2bcd(dt.hour()));
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Wire._I2C_WRITE(bin2bcd(0));
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Wire._I2C_WRITE(bin2bcd(dt.day()));
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Wire._I2C_WRITE(bin2bcd(dt.month()));
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Wire._I2C_WRITE(bin2bcd(dt.year() - 2000));
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Wire.endTransmission();
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uint8_t statreg = read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG);
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statreg &= ~0x80; // flip OSF bit
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write_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG, statreg);
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}
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DateTime RTC_DS3231::now() {
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Wire.beginTransmission(DS3231_ADDRESS);
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Wire._I2C_WRITE((byte)0);
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Wire.endTransmission();
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Wire.requestFrom(DS3231_ADDRESS, 7);
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uint8_t ss = bcd2bin(Wire._I2C_READ() & 0x7F);
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uint8_t mm = bcd2bin(Wire._I2C_READ());
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uint8_t hh = bcd2bin(Wire._I2C_READ());
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Wire._I2C_READ();
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uint8_t d = bcd2bin(Wire._I2C_READ());
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uint8_t m = bcd2bin(Wire._I2C_READ());
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uint16_t y = bcd2bin(Wire._I2C_READ()) + 2000;
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return DateTime (y, m, d, hh, mm, ss);
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}
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Ds3231SqwPinMode RTC_DS3231::readSqwPinMode() {
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int mode;
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Wire.beginTransmission(DS3231_ADDRESS);
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Wire._I2C_WRITE(DS3231_CONTROL);
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Wire.endTransmission();
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Wire.requestFrom((uint8_t)DS3231_ADDRESS, (uint8_t)1);
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mode = Wire._I2C_READ();
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mode &= 0x93;
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return static_cast<Ds3231SqwPinMode>(mode);
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}
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void RTC_DS3231::writeSqwPinMode(Ds3231SqwPinMode mode) {
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uint8_t ctrl;
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ctrl = read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL);
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ctrl &= ~0x04; // turn off INTCON
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ctrl &= ~0x18; // set freq bits to 0
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if (mode == DS3231_OFF) {
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ctrl |= 0x04; // turn on INTCN
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} else {
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ctrl |= mode;
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}
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write_i2c_register(DS3231_ADDRESS, DS3231_CONTROL, ctrl);
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|
|
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//Serial.println( read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL), HEX);
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}
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