Adding temperature to Dotklok

dotklok.ino

// temperature()
// Temperature Sensor + Clock - by Daniel Spillere Andrade - www.DanielAndrade.net
// Should Change the Temperature Only when minutes change, to prevent floating on temperature
// Based on http://www.danielandrade.net/2008/07/05/temperature-sensor-arduino/ - Daniel Spillere Andrade - daniel [a] danielandrade.net
 
void temperature(){
 

  ht1632_clear();
  
  plot(0,0,1); plot(0,15,1); plot(23,15,1); plot(23,0,1);
  
  //Draw Dots and Temperature
  
  plot(7,3,1);
  plot(7,5,1);
  plot(16,3,1);
  plot(16,5,1);
  
  plot(13,9,1);
  plot(13,10,1);
  plot(14,9,1);
  plot(14,10,1);
  
  // Drawing the 'C', it's ugly I know :)
  for(int i=16;i<19;i++){  
    for(int j=9;j<14;j++){    
          if(j==9 || j==13) { plot (i,j,1);}
          else { plot(16,j,1); }    
    }
  }
  
  int temppin = 3; // Define LM35 PIN
  int tempval; // Temperature Read Variable
  
  tempval = ( 5.0 * analogRead(temppin) * 100.0) / 1024.0; //Makes the first read

  /* TIME LOOP */
  do{
    
    time_now = RTC.now();
      
    if( ( time_now.minute() != time_prev.minute() ) ){
    if( !power_up && midnight_random() )  return;
       
        tempval = 0;
        for(int i=0;i< =9;i++){
          tempval = tempval + (( 5.0 * analogRead(temppin) * 100.0) / 1024.0); // Reads the Variable and converts to Celsius 
          delay(100);                                                           // tempf = (tempval * 9)/ 5 + 32; to converts to fahrenheit
        }
       tempval = tempval/10;
         
    }
      // Here starts the code. :)
      // Draw Temperature, only when minute changes!
       
      putchar_3x5(5,9,(tempval%100)/10);
      putchar_3x5(9,9,tempval%10);
      
      //Draw Time
      putchar_3x5(0,2,(time_now.hour()%100)/10);
      putchar_3x5(3,2,time_now.hour()%10);
      putchar_3x5(9,2,time_now.minute()/10);
      putchar_3x5(12,2,time_now.minute()%10);
      putchar_3x5(18,2,time_now.second()/10);
      putchar_3x5(21,2,time_now.second()%10);
      
      time_prev = time_now;

    /* CHECK BUTTONS, return if necessary */  
    if( change_animation() )  return;
    
    while( PAUSE && b5.isPressed( )); // pause mode for photos
            
  } while(1);
  
  
}