panki/fz-metronome
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working note length selection

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This commit is contained in:
Felix Pankratz 2022-09-18 20:49:20 +02:00
parent e6927559df
commit 395fb1dc10
1 changed files with 16 additions and 5 deletions
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21
metronome.c
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@ -91,11 +91,12 @@ static void timer_callback(void* ctx) {
}
static uint32_t bpm_to_sleep_ticks(double bpm) {
static uint32_t state_to_sleep_ticks(MetronomeState* metronome_state) {
// calculate time between beeps
uint32_t tps = furi_kernel_get_tick_frequency();
double bps = (double)bpm / 60;
return (uint32_t)round(tps / bps) - ((BEEP_DELAY_MS/1000)*tps);
double multiplier = 4.0d/metronome_state->note_length;
double bps = (double)metronome_state->bpm / 60;
return (uint32_t)(round(tps / bps) - ((BEEP_DELAY_MS/1000)*tps)) * multiplier;
}
static void update_timer(MetronomeState* metronome_state) {
@ -103,7 +104,7 @@ static void update_timer(MetronomeState* metronome_state) {
furi_timer_stop(metronome_state->timer);
furi_timer_start(
metronome_state->timer,
bpm_to_sleep_ticks(metronome_state->bpm)
state_to_sleep_ticks(metronome_state)
);
}
}
@ -131,6 +132,15 @@ static void cycle_beats_per_bar(MetronomeState* metronome_state) {
}
}
static void cycle_note_length(MetronomeState* metronome_state) {
metronome_state->note_length *= 2;
if (metronome_state->note_length > 16) {
metronome_state->note_length = 2;
metronome_state->beats_per_bar = 1;
}
update_timer(metronome_state);
}
static void metronome_state_init(MetronomeState* const metronome_state) {
metronome_state->bpm = 120.0;
metronome_state->playing = false;
@ -187,7 +197,7 @@ int32_t metronome_app() {
case InputKeyOk:
metronome_state->playing = !metronome_state->playing;
if (metronome_state->playing) {
furi_timer_start(metronome_state->timer, bpm_to_sleep_ticks(metronome_state->bpm));
furi_timer_start(metronome_state->timer, state_to_sleep_ticks(metronome_state));
} else {
furi_timer_stop(metronome_state->timer);
}
@ -199,6 +209,7 @@ int32_t metronome_app() {
} else if (event.input.type == InputTypeLong) {
switch(event.input.key) {
case InputKeyUp:
cycle_note_length(metronome_state);
break;
case InputKeyDown:
break;