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b5 audio

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example_keyboards
Jack Humbert 8 years ago
parent 1a4a66fd01
commit eabf530a0e
1 changed files with 240 additions and 20 deletions
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232
quantum/audio/audio.c
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@ -33,17 +33,41 @@
// TIMSK3 - Timer/Counter #3 Interrupt Mask Register
// Turn on/off 3A interputs, stopping/enabling the ISR calls
#define ENABLE_AUDIO_COUNTER_3_ISR TIMSK3 |= _BV(OCIE3A)
#define DISABLE_AUDIO_COUNTER_3_ISR TIMSK3 &= ~_BV(OCIE3A)
#ifdef C6_AUDIO
#define ENABLE_AUDIO_COUNTER_3_ISR TIMSK3 |= _BV(OCIE3A)
#define DISABLE_AUDIO_COUNTER_3_ISR TIMSK3 &= ~_BV(OCIE3A)
#endif
#ifdef B5_AUDIO
#define ENABLE_AUDIO_COUNTER_1_ISR TIMSK1 |= _BV(OCIE1A)
#define DISABLE_AUDIO_COUNTER_1_ISR TIMSK1 &= ~_BV(OCIE1A)
#endif
// TCCR3A: Timer/Counter #3 Control Register
// Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
#define ENABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A |= _BV(COM3A1);
#define DISABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A &= ~(_BV(COM3A1) | _BV(COM3A0));
#ifdef C6_AUDIO
#define ENABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A |= _BV(COM3A1);
#define DISABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A &= ~(_BV(COM3A1) | _BV(COM3A0));
#endif
#ifdef B5_AUDIO
#define ENABLE_AUDIO_COUNTER_1_OUTPUT TCCR1A |= _BV(COM1A1);
#define DISABLE_AUDIO_COUNTER_1_OUTPUT TCCR1A &= ~(_BV(COM1A1) | _BV(COM1A0));
#endif
// Fast PWM Mode Controls
#define TIMER_3_PERIOD ICR3
#define TIMER_3_DUTY_CYCLE OCR3A
#ifdef C6_AUDIO
#define TIMER_3_PERIOD ICR3
#define TIMER_3_DUTY_CYCLE OCR3A
#endif
#ifdef B5_AUDIO
#define TIMER_1_PERIOD ICR1
#define TIMER_1_DUTY_CYCLE OCR1A
#endif
// -----------------------------------------------------------------------------
@ -105,16 +129,43 @@ void audio_init()
audio_config.raw = eeconfig_read_audio();
// Set port PC6 (OC3A and /OC4A) as output
#ifdef C6_AUDIO
DDRC |= _BV(PORTC6);
#else
DDRC |= _BV(PORTC6);
PORTC &= ~_BV(PORTC6);
#endif
#ifdef B5_AUDIO
DDRB |= _BV(PORTB5);
#else
DDRB |= _BV(PORTB5);
PORTB &= ~_BV(PORTB5);
#endif
#ifdef C6_AUDIO
DISABLE_AUDIO_COUNTER_3_ISR;
#endif
#ifdef B5_AUDIO
DISABLE_AUDIO_COUNTER_1_ISR;
#endif
// TCCR3A / TCCR3B: Timer/Counter #3 Control Registers
// Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
// Waveform Generation Mode (WGM3n) = 0b1110 = Fast PWM Mode 14 (Period = ICR3, Duty Cycle = OCR3A)
// Clock Select (CS3n) = 0b010 = Clock / 8
#ifdef C6_AUDIO
TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
#endif
#ifdef B5_AUDIO
TCCR1A = (0 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (0 << WGM10);
TCCR1B = (1 << WGM13) | (1 << WGM12) | (0 << CS12) | (1 << CS11) | (0 << CS10);
#endif
audio_initialized = true;
}
@ -128,8 +179,16 @@ void stop_all_notes()
}
voices = 0;
#ifdef C6_AUDIO
DISABLE_AUDIO_COUNTER_3_ISR;
DISABLE_AUDIO_COUNTER_3_OUTPUT;
#endif
#ifdef B5_AUDIO
DISABLE_AUDIO_COUNTER_1_ISR;
DISABLE_AUDIO_COUNTER_1_OUTPUT;
#endif
playing_notes = false;
playing_note = false;
@ -171,8 +230,14 @@ void stop_note(float freq)
voice_place = 0;
}
if (voices == 0) {
#ifdef C6_AUDIO
DISABLE_AUDIO_COUNTER_3_ISR;
DISABLE_AUDIO_COUNTER_3_OUTPUT;
#endif
#ifdef B5_AUDIO
DISABLE_AUDIO_COUNTER_1_ISR;
DISABLE_AUDIO_COUNTER_1_OUTPUT;
#endif
frequency = 0;
volume = 0;
playing_note = false;
@ -200,6 +265,7 @@ float vibrato(float average_freq) {
#endif
#ifdef C6_AUDIO
ISR(TIMER3_COMPA_vect)
{
float freq;
@ -328,6 +394,138 @@ ISR(TIMER3_COMPA_vect)
playing_note = false;
}
}
#endif
#ifdef B5_AUDIO
ISR(TIMER1_COMPA_vect)
{
float freq;
if (playing_note) {
if (voices > 0) {
if (polyphony_rate > 0) {
if (voices > 1) {
voice_place %= voices;
if (place++ > (frequencies[voice_place] / polyphony_rate / CPU_PRESCALER)) {
voice_place = (voice_place + 1) % voices;
place = 0.0;
}
}
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(frequencies[voice_place]);
} else {
freq = frequencies[voice_place];
}
#else
freq = frequencies[voice_place];
#endif
} else {
if (glissando) {
if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
frequency = frequency * pow(2, 440/frequency/12/2);
} else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
frequency = frequency * pow(2, -440/frequency/12/2);
} else {
frequency = frequencies[voices - 1];
}
} else {
frequency = frequencies[voices - 1];
}
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(frequency);
} else {
freq = frequency;
}
#else
freq = frequency;
#endif
}
if (envelope_index < 65535) {
envelope_index++;
}
freq = voice_envelope(freq);
if (freq < 30.517578125) {
freq = 30.52;
}
TIMER_1_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
TIMER_1_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
}
}
if (playing_notes) {
if (note_frequency > 0) {
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(note_frequency);
} else {
freq = note_frequency;
}
#else
freq = note_frequency;
#endif
if (envelope_index < 65535) {
envelope_index++;
}
freq = voice_envelope(freq);
TIMER_1_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
TIMER_1_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
} else {
TIMER_1_PERIOD = 0;
TIMER_1_DUTY_CYCLE = 0;
}
note_position++;
bool end_of_note = false;
if (TIMER_1_PERIOD > 0) {
end_of_note = (note_position >= (note_length / TIMER_1_PERIOD * 0xFFFF));
} else {
end_of_note = (note_position >= (note_length * 0x7FF));
}
if (end_of_note) {
current_note++;
if (current_note >= notes_count) {
if (notes_repeat) {
current_note = 0;
} else {
DISABLE_AUDIO_COUNTER_1_ISR;
DISABLE_AUDIO_COUNTER_1_OUTPUT;
playing_notes = false;
return;
}
}
if (!note_resting && (notes_rest > 0)) {
note_resting = true;
note_frequency = 0;
note_length = notes_rest;
current_note--;
} else {
note_resting = false;
envelope_index = 0;
note_frequency = (*notes_pointer)[current_note][0];
note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
}
note_position = 0;
}
}
if (!audio_config.enable) {
playing_notes = false;
playing_note = false;
}
}
#endif
void play_note(float freq, int vol) {
@ -338,7 +536,12 @@ void play_note(float freq, int vol) {
}
if (audio_config.enable && voices < 8) {
#ifdef C6_AUDIO
DISABLE_AUDIO_COUNTER_3_ISR;
#endif
#ifdef B5_AUDIO
DISABLE_AUDIO_COUNTER_1_ISR;
#endif
// Cancel notes if notes are playing
if (playing_notes)
@ -354,8 +557,14 @@ void play_note(float freq, int vol) {
voices++;
}
#ifdef C6_AUDIO
ENABLE_AUDIO_COUNTER_3_ISR;
ENABLE_AUDIO_COUNTER_3_OUTPUT;
#endif
#ifdef B5_AUDIO
ENABLE_AUDIO_COUNTER_1_ISR;
ENABLE_AUDIO_COUNTER_1_OUTPUT;
#endif
}
}
@ -369,7 +578,12 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
if (audio_config.enable) {
#ifdef C6_AUDIO
DISABLE_AUDIO_COUNTER_3_ISR;
#endif
#ifdef B5_AUDIO
DISABLE_AUDIO_COUNTER_1_ISR;
#endif
// Cancel note if a note is playing
if (playing_note)
@ -390,8 +604,14 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
note_position = 0;
#ifdef C6_AUDIO
ENABLE_AUDIO_COUNTER_3_ISR;
ENABLE_AUDIO_COUNTER_3_OUTPUT;
#endif
#ifdef B5_AUDIO
ENABLE_AUDIO_COUNTER_1_ISR;
ENABLE_AUDIO_COUNTER_1_OUTPUT;
#endif
}
}

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