holiday-lights/holiday-lights.ino

103 lines
1.8 KiB
C++

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