   I2CwriteByte(MAG_ADDRESS,0x0A,0x16);
   
    pinMode(13, OUTPUT);
-  Timer1.initialize(100000);         // initialize timer1, and set a 1/2 second period
+  Timer1.initialize(1000000);         // initialize timer1, and set a 1/2 second period
   Timer1.attachInterrupt(callback);  // attaches callback() as a timer overflow interrupt
   
   

  
  // print gyroscope data
    Serial.print (gx,DEC); 
    Serial.print ("\t");
    Serial.print (gy,DEC);
    Serial.print ("\t");
    Serial.print (gz,DEC);  
    Serial.print ("\t");

  }
  // _____________________

  
  // Display time
  Serial.print (millis()-ti,DEC);

  Serial.print( "\tACC:" );
  accelerometer_subr();
  Serial.print( "\tMAG:" );
  subr_magnetometer();
  Serial.print( "\tGYR:" );
  gyro_subr();
  Serial.println( "" );
  
  // _______________
  // ::: Counter :::
