mirror of https://github.com/sqfmi/Watchy.git
180 lines
5.6 KiB
C++
180 lines
5.6 KiB
C++
#ifndef WATCHY_RTC_H
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#define WATCHY_RTC_H
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#include <DS3232RTC.h>
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#include <Rtc_Pcf8563.h>
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#define DS3232_RTC_TYPE 0
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#define PCF8563_RTC_TYPE 1
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#define NO_RTC_TYPE 255
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#define RTC_DS_ADDR 0x68
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#define RTC_PCF_ADDR 0x51
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#define YEAR_OFFSET_DS3232 1970
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#define YEAR_OFFSET_PCF 2000
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#define NO_TEMPERATURE_ERR 255
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// TODO: So we're relying on an rtcType as a multiplexer, making our WatchyRTC code a bit
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// more complex. A way around this is to use a command pattern instead:
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// https://sourcemaking.com/design_patterns/command
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//
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// That way we don't have to have a bunch of conditionals floating around in this class.
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// It will simplify the process of adding a new RTC chip later as well.
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class AbstractRTC {
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public:
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virtual ~AbstractRTC() {}
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virtual void config(String datetime) {}
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virtual void clearAlarm() {}
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virtual void read(tmElements_t &tm) {}
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virtual void set(tmElements_t tm) {}
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virtual uint8_t temperature() { return NO_TEMPERATURE_ERR; }
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protected:
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String 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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if (found > index) {
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return data.substring(strIndex[0], strIndex[1]);
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}
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return "";
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}
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};
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class DS3232 : public AbstractRTC {
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public:
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DS3232RTC rtc_ds; // TODO: We should not have public member variables
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~DS3232() {}
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void config(String datetime) {
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if (datetime != "") {
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tmElements_t tm;
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// offset from 1970, since year is stored in uint8_t
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tm.Year = getValue(datetime, ':', 0).toInt() - YEAR_OFFSET_DS3232;
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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);
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rtc_ds.set(t);
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}
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// https://github.com/JChristensen/DS3232RTC
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rtc_ds.squareWave(SQWAVE_NONE); //disable square wave output
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rtc_ds.setAlarm(ALM2_EVERY_MINUTE, 0, 0, 0, 0); //alarm wakes up Watchy every minute
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rtc_ds.alarmInterrupt(ALARM_2, true); //enable alarm interrupt
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}
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void clearAlarm() {
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rtc_ds.alarm(ALARM_2);
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}
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void read(tmElements_t &tm) {
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rtc_ds.read(tm);
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tm.Year = tm.Year - 30; //reset to offset from 2000
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}
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void set(tmElements_t tm) {
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tm.Year = tm.Year + 2000 - YEAR_OFFSET_DS3232;
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time_t t = makeTime(tm);
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rtc_ds.set(t);
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}
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uint8_t temperature() {
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return rtc_ds.temperature();
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}
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};
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class PCF8563 : public AbstractRTC {
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public:
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Rtc_Pcf8563 rtc_pcf; // TODO: We should not have public member variables
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~PCF8563() {}
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void config(String datetime) {
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if (datetime != "") {
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int Year = getValue(datetime, ':', 0).toInt();
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int Month = getValue(datetime, ':', 1).toInt();
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int Day = getValue(datetime, ':', 2).toInt();
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int Hour = getValue(datetime, ':', 3).toInt();
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int Minute = getValue(datetime, ':', 4).toInt();
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int Second = getValue(datetime, ':', 5).toInt();
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//day, weekday, month, century(1=1900, 0=2000), year(0-99)
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int dayOfWeek = getDayOfWeek(Day, Month, Year);
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// offset from 2000
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rtc_pcf.setDate(Day, dayOfWeek, Month, 0, Year - YEAR_OFFSET_PCF);
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//hr, min, sec
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rtc_pcf.setTime(Hour, Minute, Second);
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}
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clearAlarm();
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}
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void 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 read(tmElements_t &tm) {
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tm.Month = rtc_pcf.getMonth();
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if (tm.Month == 0){ //PCF8563 POR sets month = 0 for some reason
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tm.Month = 1;
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tm.Year = 21; // TODO: I feel nervous about this--it's only 21 for a year, right?
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} else {
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tm.Year = rtc_pcf.getYear();
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}
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tm.Day = rtc_pcf.getDay();
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tm.Wday = rtc_pcf.getWeekday() + 1;
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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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}
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void set(tmElements_t tm) {
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int dayOfWeek = getDayOfWeek(tm.Day, tm.Month, tm.Year + YEAR_OFFSET_PCF);
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rtc_pcf.setDate(tm.Day, dayOfWeek, tm.Month, 0, 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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private:
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int getDayOfWeek(int d, int m, int y) {
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static int t[] = { 0, 3, 2, 5, 0, 3,
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5, 1, 4, 6, 2, 4 };
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y -= m < 3;
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return ( y + y / 4 - y / 100 +
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y / 400 + t[m - 1] + d) % 7;
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}
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};
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class WatchyRTC {
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public:
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uint8_t rtcType;
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public:
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WatchyRTC();
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void init();
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void config(String datetime);
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void clearAlarm();
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void read(tmElements_t &tm);
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void set(tmElements_t tm);
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uint8_t temperature();
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private:
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bool _canConnectTo(int addr);
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AbstractRTC* _rtc;
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};
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#endif |