81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
#include <stdio.h>
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#include <math.h>
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#include <cstdint>
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#include "pico/stdlib.h"
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#include "plasma2040.hpp"
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#include "common/pimoroni_common.hpp"
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#include "rgbled.hpp"
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#include "button.hpp"
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/*
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Press "B" to speed up the LED cycling effect.
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Press "A" to slow it down again.
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Press "Boot" to reset the speed back to default.
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*/
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using namespace pimoroni;
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// Set how many LEDs you have
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const uint N_LEDS = 30;
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// The speed that the LEDs will start cycling at
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const uint DEFAULT_SPEED = 10;
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// How many times the LEDs will be updated per second
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const uint UPDATES = 60;
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// Pick *one* LED type by uncommenting the relevant line below:
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// APA102-style LEDs with Data/Clock lines. AKA DotStar
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//plasma::APA102 led_strip(N_LEDS, pio0, 0, plasma::PIN_DAT, plasma::PIN_CLK);
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// WS28X-style LEDs with a single signal line. AKA NeoPixel
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// by default the WS2812 LED strip will be 400KHz, RGB with no white element
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plasma::WS2812 led_strip(N_LEDS, pio0, 0, plasma::PIN_DAT);
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Button user_sw(plasma::USER_SW, Polarity::ACTIVE_LOW, 0);
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Button button_a(plasma::BUTTON_A, Polarity::ACTIVE_LOW, 50);
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Button button_b(plasma::BUTTON_B, Polarity::ACTIVE_LOW, 50);
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RGBLED led(plasma::LED_R, plasma::LED_G, plasma::LED_B);
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int main() {
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stdio_init_all();
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led_strip.start(UPDATES);
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int speed = DEFAULT_SPEED;
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float offset = 0.0f;
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while (true) {
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bool sw = user_sw.read();
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bool a = button_a.read();
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bool b = button_b.read();
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if(sw) {
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speed = DEFAULT_SPEED;
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}
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else {
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if(a) speed--;
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if(b) speed++;
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}
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speed = std::min((int)255, std::max((int)1, speed));
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offset += float(speed) / 2000.0f;
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for(auto i = 0u; i < led_strip.num_leds; ++i) {
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float hue = float(i) / led_strip.num_leds;
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led_strip.set_hsv(i, hue + offset, 1.0f, 1.0f);
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}
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led.set_rgb(speed, 0, 255 - speed);
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// Sleep time controls the rate at which the LED buffer is updated
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// but *not* the actual framerate at which the buffer is sent to the LEDs
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sleep_ms(1000 / UPDATES);
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}
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}
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