Arduino RGB lamp

gistfile1.txt

/* Click and Press+Hold RGB lamp
By Eddie Samuels
To keep input interfaces simple, I want to use a single button to:
1) cycle trough colors
2) press and hold to enter mood lamp mode
*/

int buttonPin = 2; // analog input pin to use as a digital input
int redLed = 9; // digital output pin red led
int greenLed = 11;  // digital output pin for green led
int blueLed = 10;

int debounce = 20; // ms debounce period to prevent flickering when pressing or releasing the button
int holdTime = 2000; // ms hold period: how long to wait for press+hold event

// Button variables
int buttonVal = 0; // value read from button
int buttonLast = 0; // buffered value of the button's previous state
long btnDnTime; // time the button was pressed down
long btnUpTime; // time the button was released
boolean ignoreUp = false; // whether to ignore the button release because the click+hold was triggered

// LED variables
int ledVal = 0; // state of LED 1


//=================================================
void color(int colorVal){
  if (colorVal == 1){
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
  }
  if (colorVal == 2){
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
    digitalWrite(blueLed, LOW);
  }
  if (colorVal == 3){
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, HIGH);
  }
  if (colorVal == 4){
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
    digitalWrite(blueLed, HIGH);
  }
  if (colorVal == 5){
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, HIGH);
    digitalWrite(blueLed, LOW);
  }
  if (colorVal == 6){
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, HIGH);
  }
  if (colorVal == 7){
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, HIGH);
    digitalWrite(blueLed, HIGH);
  }
  if (colorVal == 8){
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
    ledVal = 0;
  }
}

//Fade Up
void fadeUp(int led){
  int fadeValue;
  for(fadeValue = 0 ; fadeValue <= 255; fadeValue++) { 
    analogWrite(led, fadeValue);  
    delay(35);                            
  }
}

//Fade Down  
void fadeDown(int led){
  int fadeValue;
  for(fadeValue = 255 ; fadeValue >= 0; fadeValue--) {
    analogWrite(led, fadeValue);
    delay(35);
  }    
}



void setup(){
  // Set button input pin
  pinMode(buttonPin, INPUT);
  digitalWrite(buttonPin, HIGH );

  // Set LED output pins
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(blueLed, OUTPUT);
}


//=================================================


void loop(){

  // Read the state of the button
  buttonVal = digitalRead(buttonPin);

  // Test for button pressed and store the down time
  if (buttonVal == LOW && buttonLast == HIGH && (millis() - btnUpTime) > long(debounce)){
    btnDnTime = millis();
  }

  // Test for button release and store the up time
  if (buttonVal == HIGH && buttonLast == LOW && (millis() - btnDnTime) > long(debounce)){
    if (ignoreUp == false) event1();
    else ignoreUp = false;
    btnUpTime = millis();
  }

// Test for button held down for longer than the hold time
  if (buttonVal == LOW && (millis() - btnDnTime) > long(holdTime)){
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
    fadeUp(blueLed);
    event2();
    ignoreUp = true;
    btnDnTime = millis();
  }

  buttonLast = buttonVal;
}


//=================================================
// Events to trigger by click and press+hold

void event1()
{
  ledVal++;
  color(ledVal);
}

void event2(){
  fadeUp(greenLed);
  fadeDown(blueLed);
  fadeUp(redLed);
  fadeDown(greenLed);
  fadeUp(blueLed);
  fadeDown(redLed);
  event2();
}