Arduino Due DS3231

Is there by any chance a DS3231 or equivalent library for the Arduino Due?

I believe I have solved my problem, I used this example, modified the deprecated wire commands and it works great.

I believe that the DS3231 should work with the DS1307 library, but I have not used it...

#include "Wire.h"
#define DS3231_ADDRESS 0x68

void setup(){
  Wire.begin();
  Serial.begin(9600);
}

void loop(){
  printDate();
  delay(1000);
}

byte bcdToDec(byte val)  {
// Convert binary coded decimal to normal decimal numbers
  return ( (val/16*10) + (val%16) );
}

void printDate(){

  // Reset the register pointer
  Wire.beginTransmission(DS3231_ADDRESS);
  Wire.write(0);
  Wire.endTransmission();

  Wire.requestFrom(DS3231_ADDRESS, 7);

  int second = bcdToDec(Wire.read());
  int minute = bcdToDec(Wire.read());
  int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
  int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
  int monthDay = bcdToDec(Wire.read());
  int month = bcdToDec(Wire.read());
  int year = bcdToDec(Wire.read());

  //print the date EG   3/1/11 23:59:59
  printDigits(month);
  Serial.print("/");
  printDigits(monthDay);
  Serial.print("/");
  printDigits(year);
  Serial.print(" ");
  printDigits(hour);
  Serial.print(":");
  printDigits(minute);
  Serial.print(":");
  printDigits(second);
  Serial.println();

}

void printDigits(int digits){
  // utility function for digital clock display: prints preceding colon and leading 0
  if(digits < 10)
    Serial.print('0');
  Serial.print(digits);
}

Old post, but for what its worth, the DS1307 'RTClib' library does seem to work with the DS3231 on the due, at least initially....

I too can confirm the DS3231 works fine with the DS1307 rtc lib, but might I also suggest an alternative as DS3231 - Rinky-Dink Electronics.

Regards,

Graham

Thanks Graham, I'll add that to my library list. :slight_smile:

I'm coding a few projects up at present using the DS3231, for both DUE and AVR and have found two other sources for libraries.

First is what I use and is based on the DS3232 which is the same as DS3231 except the DS3232 has two programmable alarms and 263 bytes of read/write SRAM.

EDIT:
For above library, you will need to make a small change of instantiation in both the .h and .cpp file as follows:
Header, change at line 116, RTC to someting like RTC_DS3232

extern DS3232RTC RTC_DS3232;

Source file, change same again at line 530:

DS3232RTC RTC_DS3232 = DS3232RTC();  // instantiate for use

To avoid clash with SAM RTC.

Next is for DS3231, but may not tie in as well with the 'Time' library as the above library.
http://rweather.github.io/arduinolibs/classDS3231RTC.html


Paul