/*H*******************************************************
DS3231_set.pde
Eric Ayars
4/11 Test of set-time routines for a DS3231 RTC
********************************************************/
#include <DS3231.h>
#include <Wire.h>

//************************* DEFINES ************************************

//************************* PROTOTYPES ************************************
void getDateStuff(  byte& year, byte& month, byte& date, byte& dOW,
                  byte& hour, byte& minute, byte& second );

//************************* VARIABLES ************************************
DS3231 myRTC;
byte   dow, hour, minute; second;

/*F********************************************************************
*
**********************************************************************/
void 
setup() 
{
    Serial.begin(  BAUD  );                               // START SERIAL PORT
    Wire.begin();                                         // START I2C IFACE
}
/*F********************************************************************
*
**********************************************************************/
void 
loop() 
{
// If something is coming in on serial line, it's a time correction so set clock
    if ( Serial.available() ) 
	{
        getDateStuff( year, month, date, dOW, hour, minute, second );
        myRTC.setClockMode( false );  // set to 24h
        //setClockMode( true ); // set to 12h
        myRTC.setYear( year );
        myRTC.setMonth( month );
        myRTC.setDate( date );
        myRTC.setDoW( dOW );
        myRTC.setHour( hour );
        myRTC.setMinute( minute );
        myRTC.setSecond( second );
        // Test of alarm functions
        // set A1 to one minute past the time we just set the clock
        // on current day of week.
        myRTC.setA1Time( dOW, hour, minute+1, second, 0x0, true, false, false );
        // set A2 to two minutes past, on current day of month.
        myRTC.setA2Time( date, hour, minute+2, 0x0, false, false, false );
        // Turn on both alarms, with external interrupt
        myRTC.turnOnAlarm( 1 );
        myRTC.turnOnAlarm( 2 );
    }
    delay( 1000 );
}
/*F********************************************************************
*
**********************************************************************/
void 
getDateStuff(  byte& year, byte& month, byte& date, byte& dOW,
                  byte& hour, byte& minute, byte& second ) 
{
// Call this if you notice something coming in on serial port. stuff coming
// in should be in order YYMMDDwHHMMSS, with an 'x' at end.
    boolean gotString = false;
    char inChar;
    byte temp1, temp2;
    char inString[20];
    
    byte j=0;
    while ( !gotString ) 
	{
        if ( Serial.available() ) 
		{
            inChar = Serial.read();
            inString[j] = inChar;
            j += 1;
            if ( inChar == 'x' ) 
                gotString = true;
        }
    }
    Serial.println( inString );
    temp1 = ( byte )inString[0] -48;                      // READ YEAR FIRST
    temp2 = ( byte )inString[1] -48;
    year = temp1*10 + temp2;
    temp1 = ( byte )inString[2] -48;                            // NOW MONTH
    temp2 = ( byte )inString[3] -48;
    month = temp1*10 + temp2;
    temp1 = ( byte )inString[4] -48;                             // NOW DATE
    temp2 = ( byte )inString[5] -48;
    date = temp1*10 + temp2;
    dOW = ( byte )inString[6] - 48;                       // NOW dAY OF WEEK
    temp1 = ( byte )inString[7] -48;                             // NOW HOUR
    temp2 = ( byte )inString[8] -48;
    hour = temp1*10 + temp2;
    temp1 = ( byte )inString[9] -48;                           // NOW MINUTE
    temp2 = ( byte )inString[10] -48;
    minute = temp1*10 + temp2;
    temp1 = ( byte )inString[11] -48;                          // NOW SECOND
    temp2 = ( byte )inString[12] -48;
    second = temp1*10 + temp2;
}