#include "Wire.h"
#define DS1307_ADDRESS 0x68
byte zero = 0x00; //workaround for issue #527
void setup(){
Wire.begin();
Serial.begin(9600);
setDateTime(); //MUST CONFIGURE IN FUNCTION
}
void loop(){
printDate();
delay(1000);
}
void setDateTime(){
byte second = 10; //0-59
byte minute = 0; //0-59
byte hour = 2; //0-23
byte weekDay = 2; //1-7
byte monthDay = 1; //1-31
byte month = 3; //1-12
byte year = 11; //0-99
Wire.beginTransmission(DS1307_ADDRESS);
Wire.write(zero);
Wire.write(decToBcd(second));
Wire.write(decToBcd(minute));
Wire.write(decToBcd(hour));
Wire.write(decToBcd(weekDay));
Wire.write(decToBcd(monthDay));
Wire.write(decToBcd(month));
Wire.write(decToBcd(year));
Wire.write(zero); //start
Wire.endTransmission();
}
byte decToBcd(byte val){
// Convert normal decimal numbers to binary coded decimal
return ( (val/10*16) + (val%10) );
}
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(DS1307_ADDRESS);
Wire.write(zero);
Wire.endTransmission();
Wire.requestFrom(DS1307_ADDRESS, 7);
int second = bcdToDec(Wire.read());
int minute = bcdToDec(Wire.read());
int hour = bcdToDec(Wire.read() & 0b11111); //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
// Serial.print(month);
// Serial.print("/");
// Serial.print(monthDay);
// Serial.print("/");
// Serial.print(year);
/// Serial.print(" ");
Serial.print(hour);
Serial.print(":");
Serial.print(minute);
Serial.print(":");
Serial.println(second);
}
So... I have no clue how this happened but I stumbled upon this code... and well I enter my numbers here
byte second = 10; //0-59
byte minute = 0; //0-59
byte hour = 2; //0-23
byte weekDay = 2; //1-7
byte monthDay = 1; //1-31
byte month = 3; //1-12
byte year = 11; //0-99
And it gives me exactly what I need!