39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
#include "pico/stdlib.h"
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#include "plasma_stick.hpp"
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#include "common/pimoroni_common.hpp"
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/*
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A basic fire effect.
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*/
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using namespace pimoroni;
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using namespace plasma;
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// Set how many LEDs you have
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const uint NUM_LEDS = 50;
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// Set up the WS2812 / NeoPixel™ LEDs, with RGB color order to work with the LED wire that comes with Skully
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WS2812 led_strip(NUM_LEDS, pio0, 0, plasma_stick::DAT, WS2812::DEFAULT_SERIAL_FREQ, false, WS2812::COLOR_ORDER::RGB);
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// Maps a value from one range to another
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float map(float x, float in_min, float in_max, float out_min, float out_max) {
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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int main() {
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stdio_init_all();
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// Start updating the LED strip
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led_strip.start();
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while(true) {
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// fire effect! Random red/orange hue, full saturation, random brightness
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for(auto i = 0u; i < NUM_LEDS; ++i) {
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float hue = map((float)rand(), 0.0f, (float)RAND_MAX, 0.0, 50.0f / 360.0f);
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float brightness = map((float)rand(), 0.0f, (float)RAND_MAX, 0.0, 1.0f);
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led_strip.set_hsv(i, hue, 1.0, brightness);
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}
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sleep_ms(100);
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}
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}
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