kopia lustrzana https://github.com/pimoroni/pimoroni-pico
84 wiersze
2.4 KiB
C++
84 wiersze
2.4 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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How to read the buttons and rotary dial of the Encoder Wheel breakout, only when an interrupt occurs.
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*/
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// Constants
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const std::string BUTTON_NAMES[] = {"Up", "Down", "Left", "Right", "Centre"};
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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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BreakoutEncoderWheel::DEFAULT_IOE_I2C_ADDRESS,
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BreakoutEncoderWheel::DEFAULT_LED_I2C_ADDRESS,
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3); // 3 for BG_BASE, 22 for EXPLORER_BASE, or 19 for some RP2040 boards
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// If wiring the breakout via the qw/st connector, use the below line instead
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// BreakoutEncoderWheel wheel(&i2c);
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// Variables
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bool last_pressed[NUM_BUTTONS] = {false, false, false, false, false};
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bool pressed[NUM_BUTTONS] = {false, false, false, false, false};
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int position = 0;
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float hue = 0.0f;
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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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// Set the first LED
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wheel.clear();
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wheel.set_hsv(position, hue, 1.0f, 1.0f);
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wheel.show();
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// Clear any left over interrupt from previous code
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wheel.clear_interrupt_flag();
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// Loop forever
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while(true) {
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// Check if the interrupt has fired
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if(wheel.get_interrupt_flag()) {
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wheel.clear_interrupt_flag();
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// Read all of the encoder wheel's buttons
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for(int b = 0 ; b < NUM_BUTTONS; b++) {
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pressed[b] = wheel.pressed(b);
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if(pressed[b] != last_pressed[b]) {
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printf("%s %s\n", BUTTON_NAMES[b].c_str(), pressed[b] ? "Pressed" : "Released");
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}
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last_pressed[b] = pressed[b];
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}
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// The interrupt may have come from several sources,
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// so check if it was a position change
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int new_position = wheel.step();
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if(new_position != position) {
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// Record the new position (from 0 to 23)
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position = new_position;
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printf("Position = %d\n", position);
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// Record a colour hue from 0.0 to 1.0
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hue = fmodf(wheel.revolutions(), 1.0f);
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// Set the LED at the new position to the new hue
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wheel.clear();
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wheel.set_hsv(position, hue, 1.0f, 1.0f);
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wheel.show();
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}
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}
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}
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}
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return 0;
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} |