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rtcsetup.ino
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void RtcSetup () | |
{ | |
Serial.print("compiled: "); | |
Serial.print(__DATE__); | |
Serial.println(__TIME__); | |
Rtc.Begin(21, 23); | |
RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__); | |
printDateTime(compiled); | |
Serial.println(); | |
if (!Rtc.IsDateTimeValid()) | |
{ | |
if (Rtc.LastError() != 0) | |
{ | |
// we have a communications error | |
// see https://www.arduino.cc/en/Reference/WireEndTransmission for | |
// what the number means | |
Serial.print("RTC communications error = "); | |
Serial.println(Rtc.LastError()); | |
} | |
else | |
{ | |
// Common Causes: | |
// 1) first time you ran and the device wasn't running yet | |
// 2) the battery on the device is low or even missing | |
Serial.println("RTC lost confidence in the DateTime!"); | |
Rtc.SetDateTime(compiled); | |
} | |
} | |
if (!Rtc.GetIsRunning()) | |
{ | |
Serial.println("RTC was not actively running, starting now"); | |
Rtc.SetIsRunning(true); | |
} | |
RtcDateTime now = Rtc.GetDateTime(); | |
if (now < compiled) | |
{ | |
Serial.println("RTC is older than compile time! (Updating DateTime)"); | |
Rtc.SetDateTime(compiled); | |
} | |
// never assume the Rtc was last configured by you, so | |
// just clear them to your needed state | |
Rtc.Enable32kHzPin(false); | |
Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone); | |
} |
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