LED Tree

gistfile1.txt

/**************** LED Tree Software **************/
/* This Software does SW PWM with 9 Pins.        */
/* If you connet LEDs with Anode, you will get   */
/* a nice sparkle effect ;-)                     */
/*                                               */
/* Autor: Stefan-Xp                              */
/* Version History:                              */
/*  - 2014-12-04 Created this sparkely thing     */
/*               from LED_Kerze_V3               */

#define LED_PIN_1 24  
#define LED_PIN_2 25 
#define LED_PIN_3 26
#define LED_PIN_4 27 
#define LED_PIN_5 28 
#define LED_PIN_6 29 
#define LED_PIN_7 30 
#define LED_PIN_8 31 
#define LED_PIN_9 23 
#define LED_PIN_10 22 
#define LED_PIN_11 19 // Some kind of overhead, but i like it

#define BRIGHTNESS_LOW 30    // Use Values greater than 0
#define BRIGHTNESS_HIGH 250  // Use Values lower than 255
#define SPARKLE_SPEED 200;   // This Value determines how slow the LEDs sparkle (the bigger the slower)
#define LED_VALUE_ON HIGH
#define LED_VALUE_OFF LOW

byte SoftPWMValues[9];
byte LED_Pins[9];
byte Sparkle[9];
int FrameCount;
int TickCount;

void setup()
{
    byte iCount;
      
    LED_Pins[0] = LED_PIN_1;
    LED_Pins[1] = LED_PIN_2;
    LED_Pins[2] = LED_PIN_3;
    LED_Pins[3] = LED_PIN_4;
    LED_Pins[4] = LED_PIN_5;
    LED_Pins[5] = LED_PIN_6;
    LED_Pins[6] = LED_PIN_7;
    LED_Pins[7] = LED_PIN_8;
    LED_Pins[8] = LED_PIN_9;
 
    for(iCount = 0; iCount<=8; iCount++)
    {
     pinMode(LED_Pins[iCount], OUTPUT); 
     
     Sparkle[iCount] = random(0,256);
    }   
}

void loop()
{
  byte iCount;
  
  // if every PWM Value is passed, activate all LEDs
  if(TickCount == 0)
  {
    digitalWrite(LED_Pins[0], LED_VALUE_ON);
    digitalWrite(LED_Pins[1], LED_VALUE_ON);
    digitalWrite(LED_Pins[2], LED_VALUE_ON);
    digitalWrite(LED_Pins[3], LED_VALUE_ON);
    digitalWrite(LED_Pins[4], LED_VALUE_ON);
    digitalWrite(LED_Pins[5], LED_VALUE_ON);
    digitalWrite(LED_Pins[6], LED_VALUE_ON);
    digitalWrite(LED_Pins[7], LED_VALUE_ON);
    digitalWrite(LED_Pins[8], LED_VALUE_ON);
    }
  else
  {
    if(SoftPWMValues[0]<TickCount){digitalWrite(LED_Pins[0], LED_VALUE_OFF);};
    if(SoftPWMValues[1]<TickCount){digitalWrite(LED_Pins[1], LED_VALUE_OFF);};
    if(SoftPWMValues[2]<TickCount){digitalWrite(LED_Pins[2], LED_VALUE_OFF);};
    if(SoftPWMValues[3]<TickCount){digitalWrite(LED_Pins[3], LED_VALUE_OFF);};
    if(SoftPWMValues[4]<TickCount){digitalWrite(LED_Pins[4], LED_VALUE_OFF);};
    if(SoftPWMValues[5]<TickCount){digitalWrite(LED_Pins[5], LED_VALUE_OFF);};
    if(SoftPWMValues[6]<TickCount){digitalWrite(LED_Pins[6], LED_VALUE_OFF);};
    if(SoftPWMValues[7]<TickCount){digitalWrite(LED_Pins[7], LED_VALUE_OFF);};
    if(SoftPWMValues[8]<TickCount){digitalWrite(LED_Pins[8], LED_VALUE_OFF);};
  }
   
  if(TickCount > 254)
    TickCount = 0;
  else
    TickCount++;
  
  // Count Dowb to update the Brigthness Values  
  FrameCount--;
       
  // Done, now adjust the Brigthness Values   
  if(FrameCount <= 0)
  {    
    // For each LED ...
    for(iCount = 0; iCount<=8; iCount++)
    {
      // If the Sparkle Value is higher than the brigthness, increase brightness
      if(Sparkle[iCount] > SoftPWMValues[iCount])
        SoftPWMValues[iCount]++;
      else
      {
        // if the Sparkle Value is lower than the brightness, keep it as that until next "sparkle"
        Sparkle[iCount]--;
        SoftPWMValues[iCount]--;
      }  
    }
    
    // This Value determines how slow the LEDs sparkle
    FrameCount = SPARKLE_SPEED; 
    
    // check if LEDs need to sparkle again from start value
    for(iCount = 0; iCount<=8; iCount++)
    {
        if(Sparkle[iCount] <= BRIGHTNESS_LOW) // this is the lowes desired brightness
           Sparkle[iCount] = BRIGHTNESS_HIGH; // this is the highest desired brightness
    }
  }

}