132 lines
5.2 KiB
Arduino
132 lines
5.2 KiB
Arduino
/*----------------------------------------------------------------------*
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* Display the date and time from a DS3231 or DS3232 RTC every second. *
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* Display the temperature once per minute. (The DS3231 does a *
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* temperature conversion once every 64 seconds. This is also the *
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* default for the DS3232.) *
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* *
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* Set the date and time by entering the following on the Arduino *
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* serial monitor: *
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* year,month,day,hour,minute,second, *
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* *
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* Where *
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* year can be two or four digits, *
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* month is 1-12, *
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* day is 1-31, *
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* hour is 0-23, and *
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* minute and second are 0-59. *
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* *
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* Entering the final comma delimiter (after "second") will avoid a *
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* one-second timeout and will allow the RTC to be set more accurately. *
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* *
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* No validity checking is done, invalid values or incomplete syntax *
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* in the input will result in an incorrect RTC setting. *
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* *
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* Jack Christensen 08Aug2013 *
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* *
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* Tested with Arduino 1.0.5, Arduino Uno, DS3231/Chronodot, DS3232. *
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* *
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* This work is licensed under the Creative Commons Attribution- *
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* ShareAlike 3.0 Unported License. To view a copy of this license, *
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* visit http://creativecommons.org/licenses/by-sa/3.0/ or send a *
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* letter to Creative Commons, 171 Second Street, Suite 300, *
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* San Francisco, California, 94105, USA. *
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*----------------------------------------------------------------------*/
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#include <DS3232RTC.h> //http://github.com/JChristensen/DS3232RTC
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#include <Streaming.h> //http://arduiniana.org/libraries/streaming/
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#include <Time.h> //http://playground.arduino.cc/Code/Time
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#include <Wire.h> //http://arduino.cc/en/Reference/Wire
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void setup(void)
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{
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Serial.begin(115200);
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//setSyncProvider() causes the Time library to synchronize with the
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//external RTC by calling RTC.get() every five minutes by default.
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setSyncProvider(RTC.get);
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Serial << F("RTC Sync");
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if (timeStatus() != timeSet) Serial << F(" FAIL!");
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Serial << endl;
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}
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void loop(void)
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{
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static time_t tLast;
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time_t t;
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tmElements_t tm;
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//check for input to set the RTC, minimum length is 12, i.e. yy,m,d,h,m,s
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if (Serial.available() >= 12) {
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//note that the tmElements_t Year member is an offset from 1970,
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//but the RTC wants the last two digits of the calendar year.
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//use the convenience macros from Time.h to do the conversions.
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int y = Serial.parseInt();
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if (y >= 100 && y < 1000)
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Serial << F("Error: Year must be two digits or four digits!") << endl;
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else {
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if (y >= 1000)
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tm.Year = CalendarYrToTm(y);
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else //(y < 100)
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tm.Year = y2kYearToTm(y);
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tm.Month = Serial.parseInt();
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tm.Day = Serial.parseInt();
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tm.Hour = Serial.parseInt();
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tm.Minute = Serial.parseInt();
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tm.Second = Serial.parseInt();
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t = makeTime(tm);
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RTC.set(t); //use the time_t value to ensure correct weekday is set
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setTime(t);
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Serial << F("RTC set to: ");
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printDateTime(t);
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Serial << endl;
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//dump any extraneous input
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while (Serial.available() > 0) Serial.read();
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}
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}
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t = now();
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if (t != tLast) {
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tLast = t;
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printDateTime(t);
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if (second(t) == 0) {
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float c = RTC.temperature() / 4.;
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float f = c * 9. / 5. + 32.;
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Serial << F(" ") << c << F(" C ") << f << F(" F");
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}
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Serial << endl;
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}
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}
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//print date and time to Serial
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void printDateTime(time_t t)
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{
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printDate(t);
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Serial << ' ';
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printTime(t);
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}
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//print time to Serial
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void printTime(time_t t)
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{
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printI00(hour(t), ':');
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printI00(minute(t), ':');
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printI00(second(t), ' ');
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}
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//print date to Serial
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void printDate(time_t t)
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{
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printI00(day(t), 0);
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Serial << monthShortStr(month(t)) << _DEC(year(t));
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}
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//Print an integer in "00" format (with leading zero),
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//followed by a delimiter character to Serial.
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//Input value assumed to be between 0 and 99.
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void printI00(int val, char delim)
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{
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if (val < 10) Serial << '0';
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Serial << _DEC(val);
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if (delim > 0) Serial << delim;
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return;
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} |