led_array.pde

int pins[] = {11, 10, 9};  // R, G, B
int pinCnt = sizeof(pins) / sizeof(pins[0]); 
String mode = "not test"; //set to test to debug
String mesg = "Pin ";
void ledDown(int pin, int lag){
  Serial.println(mesg + pin + " going down"); 
  for(int fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
    analogWrite(pin, fadeValue); 
    delay(lag);                            
  }
}
void ledUp(int pin, int lag){
  Serial.println(mesg + pin + " going up"); 
  for(int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) { 
    analogWrite(pin, fadeValue);  
    delay(lag);                            
  }
}
void setup()
{
    Serial.begin(115200); 
    if (mode == "test") {
        for (int i=0; i < pinCnt; i++){
          pinMode(pins[i], OUTPUT); // set pin modes
        }
    }
}
void loop()
{
    if (mode == "test") {
        for (int i=0; i < pinCnt; i++){
            for (int j=0; j < pinCnt; j++){
                if (i==j){
                    digitalWrite(pins[j], HIGH);
                    Serial.println(mesg + pins[j] + " is on"); 
                } else {
                    digitalWrite(pins[j], LOW);
                }
            }
            delay(500);
        }
    } else {  // MAIN FUNCTION
        for (int cycle=0; cycle < pinCnt; cycle++){
            ledUp(pins[cycle],30);                        
            for (int i=0; i < pinCnt; i++){
                if (i!=cycle)
                    ledUp(pins[i],30);                        
            }
            for (int j=0; j < pinCnt; j++){
                if (j!=cycle)
                    ledDown(pins[j],30);
            }
            ledDown(pins[cycle],30);
        }//end cycle
    }
}