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Implement buzzer methods with AudioContext API

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This commit is contained in:
Alexsander Akers
2022-01-27 11:12:01 -05:00
parent 14e4562b7a
commit a0f8e9c8bc
7 changed files with 95 additions and 25 deletions
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82
watch-library/simulator/watch/watch_buzzer.c
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@@ -24,37 +24,79 @@
#include "watch_buzzer.h"
inline void watch_enable_buzzer(void) {
// TODO: (a2) hook to UI
#include <emscripten.h>
static bool buzzer_enabled = false;
static uint32_t buzzer_period;
void watch_enable_buzzer(void) {
buzzer_enabled = true;
buzzer_period = NotePeriods[BUZZER_NOTE_A4];
EM_ASM({
Module['audioContext'] = new (window.AudioContext || window.webkitAudioContext)();
});
}
inline void watch_set_buzzer_period(uint32_t period) {
// TODO: (a2) hook to UI
void watch_set_buzzer_period(uint32_t period) {
if (!buzzer_enabled) return;
buzzer_period = period;
}
void watch_disable_buzzer(void) {
_watch_disable_tcc();
buzzer_enabled = false;
buzzer_period = NotePeriods[BUZZER_NOTE_A4];
EM_ASM({
if (Module['audioContext']) {
Module['audioContext'].close();
Module['audioContext'] = null;
}
});
}
inline void watch_set_buzzer_on(void) {
// TODO: (a2) hook to UI
void watch_set_buzzer_on(void) {
if (!buzzer_enabled) return;
EM_ASM({
const audioContext = Module['audioContext'];
if (!audioContext) return;
if (!(audioContext._oscillator && audioContext._gain)) {
const oscillator = audioContext.createOscillator();
const gain = audioContext.createGain();
oscillator.type = 'triangle';
oscillator.connect(gain);
gain.connect(audioContext.destination);
oscillator.start(0);
audioContext._oscillator = oscillator;
audioContext._gain = gain;
}
audioContext._oscillator.frequency.value = 1e6/$0;
audioContext._gain.gain.value = 1;
}, buzzer_period);
}
inline void watch_set_buzzer_off(void) {
// TODO: (a2) hook to UI
}
void watch_set_buzzer_off(void) {
if (!buzzer_enabled) return;
// note: the buzzer uses a 1 MHz clock. these values were determined by dividing 1,000,000 by the target frequency.
// i.e. for a 440 Hz tone (A4 on the piano), 1MHz/440Hz = 2273
const uint16_t NotePeriods[108] = {0};
EM_ASM({
const audioContext = Module['audioContext'];
if (audioContext && audioContext._gain) {
audioContext._gain.gain.value = 0;
}
});
}
void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms) {
if (note == BUZZER_NOTE_REST) {
watch_set_buzzer_off();
} // else {
// hri_tcc_write_PERBUF_reg(TCC0, NotePeriods[note]);
// hri_tcc_write_CCBUF_reg(TCC0, WATCH_BUZZER_TCC_CHANNEL, NotePeriods[note] / 2);
// watch_set_buzzer_on();
// }
// delay_ms(duration_ms);
// watch_set_buzzer_off();
} else {
watch_set_buzzer_period(NotePeriods[note]);
watch_set_buzzer_on();
}
emscripten_sleep(duration_ms);
watch_set_buzzer_off();
}

1
watch-library/simulator/watch/watch_deepsleep.c
View File

@@ -35,6 +35,7 @@ static uint32_t watch_backup_data[8];
void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool level) {
if (pin == BTN_ALARM) {
watch_enable_external_interrupts();
watch_register_interrupt_callback(pin, callback, level ? INTERRUPT_TRIGGER_RISING : INTERRUPT_TRIGGER_FALLING);
}
}