kopia lustrzana https://github.com/pimoroni/pimoroni-pico
54 wiersze
1.3 KiB
C++
54 wiersze
1.3 KiB
C++
#include <math.h>
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#include <string>
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#include "pimoroni_i2c.hpp"
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#include "breakout_encoder_wheel.hpp"
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#include "time.h"
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using namespace pimoroni;
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using namespace encoderwheel;
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/*
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Displays a rotating rainbow pattern on Encoder Wheel's LED ring.
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*/
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// Constants
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constexpr float SPEED = 5.0f; // The speed that the LEDs will cycle at
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constexpr float BRIGHTNESS = 1.0f; // The brightness of the LEDs
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const uint UPDATES = 50; // How many times the LEDs will be updated per second
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const uint UPDATE_RATE_US = 1000000 / UPDATES;
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// Create a new BreakoutEncoderWheel
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I2C i2c(BOARD::BREAKOUT_GARDEN);
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BreakoutEncoderWheel wheel(&i2c);
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// Variables
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float offset = 0.0;
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int main() {
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stdio_init_all();
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// Attempt to initialise the encoder wheel
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if(wheel.init()) {
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// Loop forever
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while(true) {
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// Record the start time of this loop
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absolute_time_t start_time = get_absolute_time();
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offset += SPEED / 1000.0f;
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// Update all the LEDs
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for(int i = 0; i < NUM_LEDS; i++) {
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float hue = (float)i / NUM_LEDS;
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wheel.set_hsv(i, hue + offset, 1.0, BRIGHTNESS);
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}
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wheel.show();
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// Sleep until the next update, accounting for how long the above operations took to perform
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sleep_until(delayed_by_us(start_time, UPDATE_RATE_US));
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}
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}
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return 0;
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} |