100 lines
2.3 KiB
Arduino
100 lines
2.3 KiB
Arduino
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#include "FastLED.h"
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#define NUM_LEDS 60
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CRGB leds[NUM_LEDS];
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#define PIN 6
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void setup()
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{
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FastLED.addLeds<WS2811, PIN, GRB>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
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}
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// *** REPLACE FROM HERE ***
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void loop() {
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Fire(55,120,15);
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}
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void Fire(int Cooling, int Sparking, int SpeedDelay) {
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static byte heat[NUM_LEDS];
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int cooldown;
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// Step 1. Cool down every cell a little
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for( int i = 0; i < NUM_LEDS; i++) {
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cooldown = random(0, ((Cooling * 10) / NUM_LEDS) + 2);
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if(cooldown>heat[i]) {
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heat[i]=0;
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} else {
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heat[i]=heat[i]-cooldown;
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}
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}
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// Step 2. Heat from each cell drifts 'up' and diffuses a little
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for( int k= NUM_LEDS - 1; k >= 2; k--) {
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heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2]) / 3;
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}
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// Step 3. Randomly ignite new 'sparks' near the bottom
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if( random(255) < Sparking ) {
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int y = random(7);
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heat[y] = heat[y] + random(160,255);
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//heat[y] = random(160,255);
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}
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// Step 4. Convert heat to LED colors
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for( int j = 0; j < NUM_LEDS; j++) {
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setPixelHeatColor(j, heat[j] );
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}
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showStrip();
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delay(SpeedDelay);
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}
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void setPixelHeatColor (int Pixel, byte temperature) {
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// Scale 'heat' down from 0-255 to 0-191
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byte t192 = round((temperature/255.0)*191);
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// calculate ramp up from
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byte heatramp = t192 & 0x3F; // 0..63
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heatramp <<= 2; // scale up to 0..252
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// figure out which third of the spectrum we're in:
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if( t192 > 0x80) { // hottest
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setPixel(Pixel, 255, 255, heatramp);
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} else if( t192 > 0x40 ) { // middle
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setPixel(Pixel, 255, heatramp, 0);
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} else { // coolest
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setPixel(Pixel, heatramp, 0, 0);
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}
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}
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// *** REPLACE TO HERE ***
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void showStrip() {
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#ifdef ADAFRUIT_NEOPIXEL_H
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// NeoPixel
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strip.show();
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#endif
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#ifndef ADAFRUIT_NEOPIXEL_H
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// FastLED
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FastLED.show();
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#endif
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}
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void setPixel(int Pixel, byte red, byte green, byte blue) {
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#ifdef ADAFRUIT_NEOPIXEL_H
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// NeoPixel
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strip.setPixelColor(Pixel, strip.Color(red, green, blue));
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#endif
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#ifndef ADAFRUIT_NEOPIXEL_H
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// FastLED
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leds[Pixel].r = red;
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leds[Pixel].g = green;
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leds[Pixel].b = blue;
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#endif
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}
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void setAll(byte red, byte green, byte blue) {
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for(int i = 0; i < NUM_LEDS; i++ ) {
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setPixel(i, red, green, blue);
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}
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showStrip();
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}
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