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https://github.com/openstenoproject/qmk
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b5 audio
This commit is contained in:
Jack Humbert
parent
1a4a66fd01
commit
eabf530a0e
1 changed files with 240 additions and 20 deletions
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@ -33,17 +33,41 @@
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// TIMSK3 - Timer/Counter #3 Interrupt Mask Register
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// Turn on/off 3A interputs, stopping/enabling the ISR calls
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#define ENABLE_AUDIO_COUNTER_3_ISR TIMSK3 |= _BV(OCIE3A)
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#define DISABLE_AUDIO_COUNTER_3_ISR TIMSK3 &= ~_BV(OCIE3A)
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#ifdef C6_AUDIO
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#define ENABLE_AUDIO_COUNTER_3_ISR TIMSK3 |= _BV(OCIE3A)
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#define DISABLE_AUDIO_COUNTER_3_ISR TIMSK3 &= ~_BV(OCIE3A)
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#endif
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#ifdef B5_AUDIO
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#define ENABLE_AUDIO_COUNTER_1_ISR TIMSK1 |= _BV(OCIE1A)
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#define DISABLE_AUDIO_COUNTER_1_ISR TIMSK1 &= ~_BV(OCIE1A)
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#endif
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// TCCR3A: Timer/Counter #3 Control Register
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// Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
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#define ENABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A |= _BV(COM3A1);
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#define DISABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A &= ~(_BV(COM3A1) | _BV(COM3A0));
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#ifdef C6_AUDIO
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#define ENABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A |= _BV(COM3A1);
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#define DISABLE_AUDIO_COUNTER_3_OUTPUT TCCR3A &= ~(_BV(COM3A1) | _BV(COM3A0));
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#endif
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#ifdef B5_AUDIO
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#define ENABLE_AUDIO_COUNTER_1_OUTPUT TCCR1A |= _BV(COM1A1);
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#define DISABLE_AUDIO_COUNTER_1_OUTPUT TCCR1A &= ~(_BV(COM1A1) | _BV(COM1A0));
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#endif
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// Fast PWM Mode Controls
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#define TIMER_3_PERIOD ICR3
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#define TIMER_3_DUTY_CYCLE OCR3A
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#ifdef C6_AUDIO
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#define TIMER_3_PERIOD ICR3
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#define TIMER_3_DUTY_CYCLE OCR3A
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#endif
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#ifdef B5_AUDIO
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#define TIMER_1_PERIOD ICR1
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#define TIMER_1_DUTY_CYCLE OCR1A
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#endif
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// -----------------------------------------------------------------------------
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@ -105,16 +129,43 @@ void audio_init()
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audio_config.raw = eeconfig_read_audio();
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// Set port PC6 (OC3A and /OC4A) as output
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DDRC |= _BV(PORTC6);
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#ifdef C6_AUDIO
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DDRC |= _BV(PORTC6);
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#else
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DDRC |= _BV(PORTC6);
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PORTC &= ~_BV(PORTC6);
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#endif
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#ifdef B5_AUDIO
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DDRB |= _BV(PORTB5);
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#else
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DDRB |= _BV(PORTB5);
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PORTB &= ~_BV(PORTB5);
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#endif
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#ifdef C6_AUDIO
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DISABLE_AUDIO_COUNTER_3_ISR;
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#endif
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#ifdef B5_AUDIO
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DISABLE_AUDIO_COUNTER_1_ISR;
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#endif
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// TCCR3A / TCCR3B: Timer/Counter #3 Control Registers
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// Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
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// Waveform Generation Mode (WGM3n) = 0b1110 = Fast PWM Mode 14 (Period = ICR3, Duty Cycle = OCR3A)
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// Clock Select (CS3n) = 0b010 = Clock / 8
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#ifdef C6_AUDIO
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TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
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TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
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#endif
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#ifdef B5_AUDIO
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TCCR1A = (0 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (0 << WGM10);
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TCCR1B = (1 << WGM13) | (1 << WGM12) | (0 << CS12) | (1 << CS11) | (0 << CS10);
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#endif
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audio_initialized = true;
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}
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@ -128,8 +179,16 @@ void stop_all_notes()
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}
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voices = 0;
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#ifdef C6_AUDIO
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DISABLE_AUDIO_COUNTER_3_ISR;
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DISABLE_AUDIO_COUNTER_3_OUTPUT;
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#endif
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#ifdef B5_AUDIO
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DISABLE_AUDIO_COUNTER_1_ISR;
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DISABLE_AUDIO_COUNTER_1_OUTPUT;
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#endif
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playing_notes = false;
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playing_note = false;
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@ -171,8 +230,14 @@ void stop_note(float freq)
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voice_place = 0;
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}
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if (voices == 0) {
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#ifdef C6_AUDIO
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DISABLE_AUDIO_COUNTER_3_ISR;
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DISABLE_AUDIO_COUNTER_3_OUTPUT;
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#endif
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#ifdef B5_AUDIO
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DISABLE_AUDIO_COUNTER_1_ISR;
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DISABLE_AUDIO_COUNTER_1_OUTPUT;
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#endif
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frequency = 0;
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volume = 0;
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playing_note = false;
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@ -200,6 +265,7 @@ float vibrato(float average_freq) {
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#endif
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#ifdef C6_AUDIO
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ISR(TIMER3_COMPA_vect)
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{
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float freq;
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@ -328,6 +394,138 @@ ISR(TIMER3_COMPA_vect)
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playing_note = false;
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}
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}
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#endif
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#ifdef B5_AUDIO
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ISR(TIMER1_COMPA_vect)
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{
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float freq;
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if (playing_note) {
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if (voices > 0) {
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if (polyphony_rate > 0) {
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if (voices > 1) {
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voice_place %= voices;
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if (place++ > (frequencies[voice_place] / polyphony_rate / CPU_PRESCALER)) {
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voice_place = (voice_place + 1) % voices;
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place = 0.0;
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}
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}
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#ifdef VIBRATO_ENABLE
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if (vibrato_strength > 0) {
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freq = vibrato(frequencies[voice_place]);
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} else {
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freq = frequencies[voice_place];
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}
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#else
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freq = frequencies[voice_place];
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#endif
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} else {
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if (glissando) {
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if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
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frequency = frequency * pow(2, 440/frequency/12/2);
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} else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
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frequency = frequency * pow(2, -440/frequency/12/2);
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} else {
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frequency = frequencies[voices - 1];
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}
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} else {
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frequency = frequencies[voices - 1];
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}
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#ifdef VIBRATO_ENABLE
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if (vibrato_strength > 0) {
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freq = vibrato(frequency);
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} else {
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freq = frequency;
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}
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#else
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freq = frequency;
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#endif
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}
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if (envelope_index < 65535) {
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envelope_index++;
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}
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freq = voice_envelope(freq);
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if (freq < 30.517578125) {
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freq = 30.52;
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}
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TIMER_1_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
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TIMER_1_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
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}
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}
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if (playing_notes) {
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if (note_frequency > 0) {
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#ifdef VIBRATO_ENABLE
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if (vibrato_strength > 0) {
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freq = vibrato(note_frequency);
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} else {
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freq = note_frequency;
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}
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#else
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freq = note_frequency;
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#endif
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if (envelope_index < 65535) {
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envelope_index++;
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}
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freq = voice_envelope(freq);
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TIMER_1_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
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TIMER_1_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
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} else {
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TIMER_1_PERIOD = 0;
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TIMER_1_DUTY_CYCLE = 0;
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}
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note_position++;
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bool end_of_note = false;
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if (TIMER_1_PERIOD > 0) {
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end_of_note = (note_position >= (note_length / TIMER_1_PERIOD * 0xFFFF));
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} else {
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end_of_note = (note_position >= (note_length * 0x7FF));
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}
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if (end_of_note) {
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current_note++;
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if (current_note >= notes_count) {
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if (notes_repeat) {
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current_note = 0;
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} else {
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DISABLE_AUDIO_COUNTER_1_ISR;
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DISABLE_AUDIO_COUNTER_1_OUTPUT;
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playing_notes = false;
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return;
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}
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}
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if (!note_resting && (notes_rest > 0)) {
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note_resting = true;
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note_frequency = 0;
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note_length = notes_rest;
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current_note--;
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} else {
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note_resting = false;
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envelope_index = 0;
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note_frequency = (*notes_pointer)[current_note][0];
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note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
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}
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note_position = 0;
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}
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}
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if (!audio_config.enable) {
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playing_notes = false;
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playing_note = false;
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}
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}
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#endif
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void play_note(float freq, int vol) {
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@ -338,7 +536,12 @@ void play_note(float freq, int vol) {
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}
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if (audio_config.enable && voices < 8) {
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#ifdef C6_AUDIO
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DISABLE_AUDIO_COUNTER_3_ISR;
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#endif
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#ifdef B5_AUDIO
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DISABLE_AUDIO_COUNTER_1_ISR;
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#endif
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// Cancel notes if notes are playing
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if (playing_notes)
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@ -354,8 +557,14 @@ void play_note(float freq, int vol) {
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voices++;
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}
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#ifdef C6_AUDIO
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ENABLE_AUDIO_COUNTER_3_ISR;
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ENABLE_AUDIO_COUNTER_3_OUTPUT;
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#endif
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#ifdef B5_AUDIO
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ENABLE_AUDIO_COUNTER_1_ISR;
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ENABLE_AUDIO_COUNTER_1_OUTPUT;
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#endif
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}
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}
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@ -369,7 +578,12 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
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if (audio_config.enable) {
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#ifdef C6_AUDIO
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DISABLE_AUDIO_COUNTER_3_ISR;
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#endif
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#ifdef B5_AUDIO
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DISABLE_AUDIO_COUNTER_1_ISR;
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#endif
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// Cancel note if a note is playing
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if (playing_note)
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@ -390,8 +604,14 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
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note_position = 0;
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#ifdef C6_AUDIO
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ENABLE_AUDIO_COUNTER_3_ISR;
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ENABLE_AUDIO_COUNTER_3_OUTPUT;
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#endif
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#ifdef B5_AUDIO
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ENABLE_AUDIO_COUNTER_1_ISR;
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ENABLE_AUDIO_COUNTER_1_OUTPUT;
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#endif
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}
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}
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