kriegsman

In order to evaluate the true randomness of "random8", I generated 64K of random bytes using random8, and ran it through "ent" to analyze the entropy:

  Entropy = 8.000000 bits per byte.

  Optimum compression would reduce the size
  of this 65536 byte file by 0 percent.

  Chi square distribution for 65536 samples is 0.00, and randomly
  would exceed this value more than than 99.99 percent of the times.

kriegsman

#include <FastLED.h>

//  Example showing how to make a simple striped color palette, 
//  and use it to animated blended color bars

#define LED_PIN     3
#define NUM_LEDS    30
CRGB leds[NUM_LEDS];

CRGBPalette16 currentPalette;

kriegsman

#include <FastLED.h>

#define LED_PIN     3
#define LED_TYPE    WS2811
#define COLOR_ORDER RGB
#define COLOR_CORRECTION CRGB(255,172,240)

#define BRIGHTNESS  64

#define NUM_LEDS    100

kriegsman

// See also __uqadd8

static inline uint8x4_t uqadd8x4 (uint8x4_t xs, uint8x4_t ys)
{
    uint8x4_t sums;
    asm volatile(
        "uqadd8 %[sums], %[xs], %[ys]" 
        : [sums] "=r" (sums) 
        : [xs] "%r" (xs), [ys] "r" (ys));
    return sums;

kriegsman

#include "FastLED.h"

#define LED_PIN     3
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
#define NUM_LEDS    30
CRGB leds[NUM_LEDS];

#define BRIGHTNESS 120
#define DENSITY     80

kriegsman

#include "FastLED.h"

#define LED_PIN     3
#define LED_TYPE    WS2811
#define COLOR_ORDER RGB
#define NUM_LEDS    50
CRGB leds[NUM_LEDS];

//  Twinkling 'holiday' lights that fade up and down in brightness.
//  Colors are chosen from a palette; a few palettes are provided.

kriegsman

#include "FastLED.h"

// FastLED "100-lines-of-code" demo reel, showing just a few 
// of the kinds of animation patterns you can quickly and easily 
// compose using FastLED.  
//
// This example also shows one easy way to define multiple 
// animations patterns and have them automatically rotate.
//
// -Mark Kriegsman, December 2014

kriegsman

#include <FastLED.h>

#define LED_PIN     3
#define NUM_LEDS    30
#define BRIGHTNESS  96
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

kriegsman

#include "FastLED.h"

// Quick and dirty 2-D fireworks simulation
// Originaly designed (and tuned for) an Adafruit 5x8 WS2811 shield
// by Mark Kriegsman, July 2013
// (and not updated since, so it's a little stale, 
//  but it's a good starting point, if rather uncommented.)

#define NUM_LEDS 40
CRGB leds[NUM_LEDS];

kriegsman

#include "FastLED.h"

// Quick and dirty 2-D fireworks simulation
// Originaly designed (and tuned for) a 16x16 matrix
// by Mark Kriegsman, July 2013
// (and not updated since, so it's a little stale, 
//  but it's a good starting point, if rather uncommented.)

#define PIXEL_WIDTH 15
#define PIXEL_HEIGHT 16