kopia lustrzana https://github.com/pimoroni/pimoroni-pico
90 wiersze
2.6 KiB
C++
90 wiersze
2.6 KiB
C++
#include <stdio.h>
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#include "pico/stdlib.h"
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#include "inventor.hpp"
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/*
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This example shows you how you can use Inventor 2040's audio output
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with a speaker to play different notes and string them together into a bleepy tune.
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It uses code written by Avram Piltch - check out his Tom's Hardware article!
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https://www.tomshardware.com/uk/how-to/buzzer-music-raspberry-pi-pico
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Press "User" button to start or stop the song.
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*/
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using namespace inventor;
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// List frequencies (in hz) to play in sequence here. Use zero for when silence or a pause is wanted
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// Song from PicoExplorer noise.py
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constexpr float SONG[] = {1397, 1397, 1319, 1397, 698, 0, 698, 0, 1047, 932,
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880, 1047, 1397, 0, 1397, 0, 1568, 1480, 1568, 784,
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0, 784, 0, 1568, 1397, 1319, 1175, 1047, 0, 1047,
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0, 1175, 1319, 1397, 1319, 1175, 1047, 1175, 1047, 932,
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880, 932, 880, 784, 698, 784, 698, 659, 587, 523,
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587, 659, 698, 784, 932, 880, 784, 880, 698, 0, 698};
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constexpr uint SONG_LENGTH = count_of(SONG);
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// The time (in seconds) to play each note for. Change this to make the song play faster or slower
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const uint NOTE_DURATION_MS = 150;
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// Create a new Inventor2040W
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Inventor2040W board;
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// Variables for recording the button state and if it has been toggled
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// Starting as True makes the song play automatically
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static bool button_toggle = true;
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static bool last_button_state = false;
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// Checks if the button has been pressed, toggling a value that is also returned.
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bool check_button_toggle() {
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bool button_state = board.switch_pressed();
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if(button_state && !last_button_state) {
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button_toggle = !button_toggle;
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}
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last_button_state = button_state;
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return button_toggle;
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}
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int main() {
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stdio_init_all();
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// Attempt to initialise the board
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if(board.init()) {
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// Set the volume of the speaker output
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board.volume(0.25f);
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while(true) {
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// Has the button been toggled?
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if(check_button_toggle()) {
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// Play the song
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for(uint i = 0; i < SONG_LENGTH && check_button_toggle(); i++) {
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// Get the frequency of the note
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float freq = SONG[i];
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if(freq == 0) {
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// This is a "pause" note, so stop the motors
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board.play_silence();
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}
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else {
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// Get the frequency of the note and play it
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board.play_tone(freq);
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}
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sleep_ms(NOTE_DURATION_MS);
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}
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button_toggle = false;
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board.stop_playing();
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}
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sleep_ms(10);
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}
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}
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return 0;
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}
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