Increase LED Brightness with Reset

gistfile1.ino

/* 
  Increase LED Brightness with Reset

  Each press of the button increases the LED brightness by 10%.
  Press and hold the button for 3 seconds to reset the LED to 0%.
 
  created 2012
  by Aaron Van Bokhoven
*/

const int buttonPin = 2;           // number of the button pin
const int ledPin = 9;              // number of the LED pin

int buttonState = 0;               // button state starts at 0
int brightness = 0;                // brightness of LED starts at 0
int fadeAmount = 25.50;            // fadeAmount is equal to 10% of 255(max LED brightness)
int buttonPressedCounter = 0;    // timer set to 0 whe depressing button
int buttonCounter = 0;             // button counter set to 0
int buttonLastState = 0;           // button last state set to 0

void setup() {
  // set button as input
  pinMode(buttonPin, INPUT);
  // set LED as output
  pinMode(ledPin, OUTPUT);
  // init serialize communication at 9600 bits per second
  Serial.begin(9600);
}

void loop() {
  // get button state
  buttonState = digitalRead(buttonPin);
  
  // activate when button is being held down
  if (buttonState == HIGH) {
    buttonPressedCounter ++; // start counter
    Serial.print("Pressed Timer: ");
    Serial.println(buttonPressedCounter);
    // if counter equals 100 turn off LED and reset counter to 0
    if (buttonPressedCounter == 50) {
      buttonCounter = 0;
      analogWrite(ledPin, 0); // reset LED 
    }
  } 
  else {
    // on button depress, set counter to 0
    buttonPressedCounter = 0; 
  }
  
  // activate once to increase button counter, which adjusts the LED brightness
  if (buttonState != buttonLastState) {
    if (buttonState == HIGH) {
      // increase counter only if less than 10
      if (buttonCounter < 10) {
        buttonCounter ++;
      }
      Serial.print("LED Level: ");
      Serial.println(buttonCounter);
      analogWrite(ledPin, buttonCounter * fadeAmount); // adjust LED brightness to buttoncounter * fadeamount
    }   
    buttonLastState = buttonState;
  }
}