103 lines
1.8 KiB
C++
103 lines
1.8 KiB
C++
#include <Adafruit_NeoPixel.h>
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#ifdef __AVR__
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#include <avr/power.h>
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#endif
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// Which pin your LED strip is connected to
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#ifdef Attiny85
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# define PIN 3
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#else
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# define PIN 6
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#endif
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// Which pin to pull to go full white. Comment to disable this feature.
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#define WHITE_PIN 4
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// Order of the lights you got
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// How many LEDs you have. It's okay if this is too big.
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#ifdef Attiny85
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# define NUM_LEDS 80
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#else
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# define NUM_LEDS 200
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#endif
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// What percentage chance a chosen light has of being on
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#define ACTIVITY 50
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// Debug LED
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#define LED_PIN 1
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Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_RGB | NEO_KHZ800);
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const uint32_t colors[] = {
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0x004400, // Green
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0xdd4400, // Yellow
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0xdd4400, // Yellow
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0xdd2200, // Amber
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0xdd2200, // Amber
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0x0000ff, // Red
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0x880044, // Purple
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0x000088, // Blue
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};
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const int ncolors = sizeof(colors) / sizeof(*colors);
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void setup() {
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strip.begin();
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strip.show();
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#ifdef WHITE_PIN
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pinMode(WHITE_PIN, INPUT_PULLUP);
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#endif
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#ifdef LED_PIN
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pinMode(LED_PIN, OUTPUT);
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#endif
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}
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void loop_color() {
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for (int i = 0; i < NUM_LEDS/12; i += 1) {
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int pos = random(NUM_LEDS);
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if (random(100) < ACTIVITY) {
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int color = random(ncolors);
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strip.setPixelColor(pos, colors[color]);
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} else {
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strip.setPixelColor(pos, 0);
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}
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}
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strip.show();
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delay(240);
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}
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void loop_white() {
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for (int i = 0; i < NUM_LEDS/12; i += 1) {
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int pos = random(NUM_LEDS);
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if (random(100) < 5) {
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strip.setPixelColor(pos, 0x0);
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} else {
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strip.setPixelColor(pos, 0x99ffaa);
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}
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}
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strip.show();
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delay(24);
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}
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void loop() {
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#ifdef WHITE_PIN
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if (! digitalRead(WHITE_PIN)) {
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loop_white();
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} else {
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#else
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{
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#endif
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loop_color();
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}
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#ifdef LED_PIN
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static bool led = true;
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digitalWrite(LED_PIN, led);
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led = !led;
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#endif
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}
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