45 lines
1.0 KiB
C++
45 lines
1.0 KiB
C++
#include <Arduino.h>
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#include "polybuzzer.h"
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PolyBuzzer::PolyBuzzer(uint8_t pin) {
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for (int i = 0; i < POLYBUZZER_MAX_TONES; i++) {
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this->tones[i] = 0;
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}
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this->playing = 0;
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this->pin = pin;
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pinMode(pin, OUTPUT);
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}
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void PolyBuzzer::update() {
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for (int i = 0; i < POLYBUZZER_MAX_TONES; i++) {
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if (tones[i]) {
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if (playing != tones[i]) {
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playing = tones[i];
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tone(this->pin, tones[i]);
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return;
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}
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}
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}
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this->playing = 0;
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noTone(this->pin);
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}
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void PolyBuzzer::Tone(int slot, unsigned int frequency) {
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tones[slot] = frequency;
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this->update();
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}
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void PolyBuzzer::Note(int slot, int note) {
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unsigned int frequency = 8.18; // MIDI note 0
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for (int i = 0; i < note; i++) {
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frequency *= 1.0594630943592953; // equal temperament half step
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}
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this->Tone(slot, frequency);
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}
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void PolyBuzzer::NoTone(int slot) {
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tones[slot] = 0;
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this->update();
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}
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