DemoReel100_with_button.ino

//***************************************************************
// This is Mark Kriegsman's FastLED DemoReel100 example with
// a modificaiton to use a button for changing patterns.  The
// timer used for picking a new pattern has been commented out
// and there is a button check inside the main loop now.
//
// Search for "BUTTON STUFF" to find the various button releated
// code additions.
//
// Marc Miller, March 2017
//***************************************************************

#include "FastLED.h"
#define DATA_PIN    11
#define CLK_PIN   13
#define LED_TYPE    LPD8806
#define COLOR_ORDER GRB
#define NUM_LEDS    32
CRGB leds[NUM_LEDS];
#define BRIGHTNESS          128
#define FRAMES_PER_SECOND  120


//---------------------------------------------------------------
//BUTTON STUFF
// This uses JChristensen's Button Library from:
//   https://github.com/JChristensen/Button
#include "Button.h"    // Include Button library
const int buttonPin = 4;  // Set digital pin used with debounced pushbutton
Button myButton(buttonPin, true, true, 50);  // Declare the button


//---------------------------------------------------------------
void setup() {
  Serial.begin(115200);  // Allows serial monitor output (check baud rate)
  delay(3000); // 3 second delay for recovery
  //FastLED.addLeds<LED_TYPE,DATA_PIN,COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.addLeds<LED_TYPE,DATA_PIN,CLK_PIN,COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(BRIGHTNESS);
}


// List of patterns to cycle through.  Each is defined as a separate function below.
typedef void (*SimplePatternList[])();
SimplePatternList gPatterns = { rainbow, confetti, sinelon, juggle };

uint8_t gCurrentPatternNumber = 0; // Index number of which pattern is current
uint8_t gHue = 0; // rotating "base color" used by many of the patterns


//---------------------------------------------------------------
void loop()
{
  // Call the current pattern function once, updating the 'leds' array
  gPatterns[gCurrentPatternNumber]();

  // send the 'leds' array out to the actual LED strip
  FastLED.show();  
  // insert a delay to keep the framerate modest
  FastLED.delay(1000/FRAMES_PER_SECOND); 

  // do some periodic updates
  EVERY_N_MILLISECONDS( 20 ) { gHue++; } // slowly cycle the "base color" through the rainbow

  // BUTTON STUFF
  //   Not using this timer to change patterns any more.  Instead check the button.
  //     EVERY_N_SECONDS( 10 ) { nextPattern(); } // change patterns periodically
  //
  readbutton();  // check for button press

}//end_main_loop

#define ARRAY_SIZE(A) (sizeof(A) / sizeof((A)[0]))


//---------------------------------------------------------------
void nextPattern()
{
  // add one to the current pattern number, and wrap around at the end
  gCurrentPatternNumber = (gCurrentPatternNumber + 1) % ARRAY_SIZE( gPatterns);
}

void rainbow() 
{
  // FastLED's built-in rainbow generator
  fill_rainbow( leds, NUM_LEDS, gHue, 12);
}

void confetti() 
{
  // random colored speckles that blink in and fade smoothly
  fadeToBlackBy( leds, NUM_LEDS, 20);
  int pos = random16(NUM_LEDS);
  leds[pos] += CHSV( gHue + random8(64), random8(128,200), random8(48,255));
}

void sinelon()
{
  // a colored dot sweeping back and forth, with fading trails
  fadeToBlackBy( leds, NUM_LEDS, 12);
  int pos = beatsin16( 13, 0, NUM_LEDS-1 );
  leds[pos] += CHSV( gHue, 255, 192);
}

void juggle() {
  // four colored dots, weaving in and out of sync with each other
  fadeToBlackBy( leds, NUM_LEDS, 20);
  byte dothue = 0;
  for( int i = 0; i < 4; i++) {
    leds[beatsin16( i+5, 0, NUM_LEDS-1 )] |= CHSV(dothue, 200, 255);
    dothue += 32;
  }
}


//BUTTON STUFF
//---------Function to read the button and do something----------
void readbutton() {
  myButton.read();
  if(myButton.wasPressed()) {
    Serial.println("Button pressed!  Next pattern...   ");
    nextPattern();  // Change to the next pattern

    //Flash pixel zero white as a visual that button was pressed.
    leds[0] = CHSV(0,0,255);  //Set first pixel color white
    FastLED.show();  //Update display
    delay(100);  //Short pause so we can see leds[0] flash
    leds[0] = CRGB::Black;  //Set first pixel off
    FastLED.show();  //Update display
    delay(100);  //Short pause so we can see leds[0] flash
  }
}//end_readbutton


//---------------------------------------------------------------