113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
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#include "WatchyRTC.h"
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WatchyRTC::WatchyRTC()
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{
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}
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void WatchyRTC::init() {
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byte error;
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Wire.beginTransmission(RTC_PCF_ADDR);
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error = Wire.endTransmission();
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}
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void WatchyRTC::config(String datetime) { // String datetime format is YYYY:MM:DD:HH:MM:SS
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_PCFConfig(datetime);
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}
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void WatchyRTC::clearAlarm() {
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int nextAlarmMinute = 0;
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rtc_pcf.clearAlarm(); // resets the alarm flag in the RTC
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nextAlarmMinute = rtc_pcf.getMinute();
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nextAlarmMinute = (nextAlarmMinute == 59) ? 0 : (nextAlarmMinute + 1); // set alarm to trigger 1 minute from now
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rtc_pcf.setAlarm(nextAlarmMinute, 99, 99, 99);
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}
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void WatchyRTC::read(tmElements_t & tm, int offsetInSeconds) {
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rtc_pcf.getDate();
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tm.Year = y2kYearToTm(rtc_pcf.getYear());
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tm.Month = rtc_pcf.getMonth();
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tm.Day = rtc_pcf.getDay();
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tm.Wday = rtc_pcf.getWeekday() + 1; // TimeLib & DS3231 has Wday range of 1-7, but PCF8563 stores day of week in 0-6 range
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tm.Hour = rtc_pcf.getHour();
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tm.Minute = rtc_pcf.getMinute();
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tm.Second = rtc_pcf.getSecond();
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int day = tm.Day;
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int hour = tm.Hour;
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int minute = tm.Minute;
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int second = tm.Second;
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// adjust for offset - making some assumptions here: month and year will never change.
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second += offsetInSeconds;
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if (second >= 60 || second < 0) {
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minute += second / 60;
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second = second % 60;
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}
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if (minute >= 60 || minute < 0) {
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hour += minute / 60;
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minute = minute % 60;
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}
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if (hour >= 24 || hour < 0) {
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day += hour / 24;
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hour = hour % 24;
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}
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tm.Day = day;
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tm.Hour = hour;
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tm.Minute = minute;
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tm.Second = second;
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}
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void WatchyRTC::set(tmElements_t tm) {
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time_t t = makeTime(tm); // make and break to calculate tm.Wday
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breakTime(t, tm);
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// day, weekday, month, century(1=1900, 0=2000), year(0-99)
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rtc_pcf.setDate(tm.Day, tm.Wday - 1, tm.Month, 0, tmYearToY2k(tm.Year));
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rtc_pcf.setTime(tm.Hour, tm.Minute, tm.Second);
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clearAlarm();
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}
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void WatchyRTC::_PCFConfig(String datetime) { // String datetime is YYYY:MM:DD:HH:MM:SS
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if (datetime != "") {
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tmElements_t tm;
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tm.Year = CalendarYrToTm(_getValue(datetime, ':', 0).toInt()); // YYYY -
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// 1970
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tm.Month = _getValue(datetime, ':', 1).toInt();
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tm.Day = _getValue(datetime, ':', 2).toInt();
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tm.Hour = _getValue(datetime, ':', 3).toInt();
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tm.Minute = _getValue(datetime, ':', 4).toInt();
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tm.Second = _getValue(datetime, ':', 5).toInt();
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time_t t = makeTime(tm); // make and break to calculate tm.Wday
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breakTime(t, tm);
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// day, weekday, month, century(1=1900, 0=2000), year(0-99)
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rtc_pcf.setDate(
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tm.Day, tm.Wday - 1, tm.Month, 0,
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tmYearToY2k(tm.Year)); // TimeLib & DS3231 has Wday range of 1-7, but
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// PCF8563 stores day of week in 0-6 range
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// hr, min, sec
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rtc_pcf.setTime(tm.Hour, tm.Minute, tm.Second);
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}
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// on POR event, PCF8563 sets month to 0, which will give an error since
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// months are 1-12
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clearAlarm();
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}
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String WatchyRTC::_getValue(String data, char separator, int index) {
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int found = 0;
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int strIndex[] = {0, -1};
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int maxIndex = data.length() - 1;
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for (int i = 0; i <= maxIndex && found <= index; i++) {
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if (data.charAt(i) == separator || i == maxIndex) {
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found++;
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strIndex[0] = strIndex[1] + 1;
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strIndex[1] = (i == maxIndex) ? i + 1 : i;
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}
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}
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return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
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}
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