Grove - RTC

I am using
Seeeduino V3.0 (Atmega 328P) and have Grove RTC and Grove - Base Shield on my Arduino.

Try to run the sample code for Grove RTC but with no luck.


What I got is the code runs until
Serial.println("check 4");
Wire.endTransmission();

and the code stopped.


Any idea??



i am using this code:

Code:

#include <Wire.h>


#define DS1307_I2C_ADDRESS 0x68  // This is the I2C address
// Global Variables
int command = 0;       // This is the command char, in ascii form, sent from the serial port     
int i;
long previousMillis = 0;        // will store last time Temp was updated
byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
byte test;

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

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

// 1) Sets the date and time on the ds1307
// 2) Starts the clock
// 3) Sets hour mode to 24 hour clock
// Assumes you're passing in valid numbers, Probably need to put in checks for valid numbers.

void setDateDs1307()               
{

   second = (byte) ((Serial.read() - 48) * 10 + (Serial.read() - 48)); // Use of (byte) type casting and ascii math to achieve result.
   minute = (byte) ((Serial.read() - 48) *10 +  (Serial.read() - 48));
   hour  = (byte) ((Serial.read() - 48) *10 +  (Serial.read() - 48));
   dayOfWeek = (byte) (Serial.read() - 48);
   dayOfMonth = (byte) ((Serial.read() - 48) *10 +  (Serial.read() - 48));
   month = (byte) ((Serial.read() - 48) *10 +  (Serial.read() - 48));
   year= (byte) ((Serial.read() - 48) *10 +  (Serial.read() - 48));
   Serial.println("check 3");
   Wire.beginTransmission(DS1307_I2C_ADDRESS);
   Wire.write((byte)0x00);
   Wire.write(decToBcd(second));    // 0 to bit 7 starts the clock
   Wire.write(decToBcd(minute));
   Wire.write(decToBcd(hour));      // If you want 12 hour am/pm you need to set
                                   // bit 6 (also need to change readDateDs1307)
   Wire.write(decToBcd(dayOfWeek));
   Wire.write(decToBcd(dayOfMonth));
   Wire.write(decToBcd(month));
   Wire.write(decToBcd(year));
   Serial.println("check 4");
   Wire.endTransmission();
   Serial.println("check 5");//<---------------------------------------------------------See if you could get to this line
}

// Gets the date and time from the ds1307 and prints result
void getDateDs1307()
{
  // Reset the register pointer
  Wire.beginTransmission(DS1307_I2C_ADDRESS);
  Wire.write((byte)0x00);
  Wire.endTransmission();

  Wire.requestFrom(DS1307_I2C_ADDRESS, 7);

  // A few of these need masks because certain bits are control bits
  second     = bcdToDec(Wire.read() & 0x7f);
  minute     = bcdToDec(Wire.read());
  hour       = bcdToDec(Wire.read() & 0x3f);  // Need to change this if 12 hour am/pm
  dayOfWeek  = bcdToDec(Wire.read());
  dayOfMonth = bcdToDec(Wire.read());
  month      = bcdToDec(Wire.read());
  year       = bcdToDec(Wire.read());

  Serial.print(hour, DEC);
  Serial.print(":");
  Serial.print(minute, DEC);
  Serial.print(":");
  Serial.print(second, DEC);
  Serial.print("  ");
  Serial.print(month, DEC);
  Serial.print("/");
  Serial.print(dayOfMonth, DEC);
  Serial.print("/");
  Serial.print(year, DEC);
  Serial.print("  ");
}


void setup()

{

  Wire.begin();
  Serial.begin(57600);


}

void loop()
{

  delay(2000);
  /*T(00-59)(00-59)(00-23)(1-7)(01-31)(01-12)(00-99) - T(sec)(min)(hour)(dayOfWeek)(dayOfMonth)(month)(year) - T Sets the date of the RTC DS1307 Chip.
Example to set the time for 02-DEC-10 @ 19:57:11 for the 3 day of the week, send this command - T1157193021210
  */
  Serial.println("check 1");
     if (Serial.available())
     {      // Look for char in serial que and process if found
      command = Serial.read();
      if (command == 84) {      //If command = "T" Set Date
  Serial.println("check 2");
       setDateDs1307();
       getDateDs1307();
       
       Serial.println(" ");
      }
      while(1)
      {
        getDateDs1307();
        delay(500);
      }
   }
 

}

Statistics : Posted by samfili • on Sun Sep 02, 2012 4:27 pm • Replies 6 • Views 356

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