diff options
Diffstat (limited to 'quantum/audio.c')
| -rw-r--r-- | quantum/audio.c | 230 |
1 files changed, 135 insertions, 95 deletions
diff --git a/quantum/audio.c b/quantum/audio.c index 8ea1bf6ff0..ab3444bc97 100644 --- a/quantum/audio.c +++ b/quantum/audio.c @@ -10,20 +10,23 @@ #include "eeconfig.h" -#include "vibrato_lut.h" +#ifdef VIBRATO_ENABLE + #include "vibrato_lut.h" +#endif #define PI 3.14159265 #define CPU_PRESCALER 8 -// Largely untested PWM audio mode (doesn't sound as good) -// #define PWM_AUDIO - #ifdef PWM_AUDIO #include "wave.h" #define SAMPLE_DIVIDER 39 #define SAMPLE_RATE (2000000.0/SAMPLE_DIVIDER/2048) // Resistor value of 1/ (2 * PI * 10nF * (2000000 hertz / SAMPLE_DIVIDER / 10)) for 10nF cap + + float places[8] = {0, 0, 0, 0, 0, 0, 0, 0}; + uint16_t place_int = 0; + bool repeat = true; #endif void delay_us(int count) { @@ -34,25 +37,21 @@ void delay_us(int count) { int voices = 0; int voice_place = 0; -double frequency = 0; +float frequency = 0; int volume = 0; long position = 0; -double frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0}; +float frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0}; int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0}; bool sliding = false; int max = 0xFF; float sum = 0; -int value = 128; float place = 0; -float places[8] = {0, 0, 0, 0, 0, 0, 0, 0}; -uint16_t place_int = 0; -bool repeat = true; uint8_t * sample; uint16_t sample_length = 0; -double freq = 0; +// float freq = 0; bool notes = false; bool note = false; @@ -62,7 +61,7 @@ float note_tempo = TEMPO_DEFAULT; float note_timbre = TIMBRE_DEFAULT; uint16_t note_position = 0; float (* notes_pointer)[][2]; -uint8_t notes_count; +uint16_t notes_count; bool notes_repeat; float notes_rest; bool note_resting = false; @@ -70,11 +69,15 @@ bool note_resting = false; uint8_t current_note = 0; uint8_t rest_counter = 0; +#ifdef VIBRATO_ENABLE float vibrato_counter = 0; float vibrato_strength = .5; float vibrato_rate = 0.125; +#endif + +float polyphony_rate = 0; -float polyphony_rate = .5; +bool inited = false; audio_config_t audio_config; @@ -94,6 +97,7 @@ void audio_off(void) { eeconfig_write_audio(audio_config.raw); } +#ifdef VIBRATO_ENABLE // Vibrato rate functions void set_vibrato_rate(float rate) { @@ -124,6 +128,8 @@ void decrease_vibrato_strength(float change) { #endif +#endif + // Polyphony functions void set_polyphony_rate(float rate) { @@ -170,7 +176,50 @@ void increase_tempo(uint8_t tempo_change) { } } +void audio_init() { + + /* check signature */ + if (!eeconfig_is_enabled()) { + eeconfig_init(); + } + audio_config.raw = eeconfig_read_audio(); + + #ifdef PWM_AUDIO + PLLFRQ = _BV(PDIV2); + PLLCSR = _BV(PLLE); + while(!(PLLCSR & _BV(PLOCK))); + PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ + + /* Init a fast PWM on Timer4 */ + TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ + TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ + OCR4A = 0; + + /* Enable the OC4A output */ + DDRC |= _BV(PORTC6); + + TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs + + TCCR3A = 0x0; // Options not needed + TCCR3B = _BV(CS31) | _BV(CS30) | _BV(WGM32); // 64th prescaling and CTC + OCR3A = SAMPLE_DIVIDER - 1; // Correct count/compare, related to sample playback + #else + DDRC |= _BV(PORTC6); + + TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs + + TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); + TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30); + #endif + + inited = true; + _delay_ms(500); +} + void stop_all_notes() { + if (!inited) { + audio_init(); + } voices = 0; #ifdef PWM_AUDIO TIMSK3 &= ~_BV(OCIE3A); @@ -189,9 +238,11 @@ void stop_all_notes() { } } -void stop_note(double freq) { +void stop_note(float freq) { if (note) { - cli(); + if (!inited) { + audio_init(); + } #ifdef PWM_AUDIO freq = freq / SAMPLE_RATE; #endif @@ -225,46 +276,10 @@ void stop_note(double freq) { volume = 0; note = false; } - sei(); } } -void init_notes() { - - /* check signature */ - if (!eeconfig_is_enabled()) { - eeconfig_init(); - } - audio_config.raw = eeconfig_read_audio(); - - #ifdef PWM_AUDIO - PLLFRQ = _BV(PDIV2); - PLLCSR = _BV(PLLE); - while(!(PLLCSR & _BV(PLOCK))); - PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ - - /* Init a fast PWM on Timer4 */ - TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ - TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ - OCR4A = 0; - - /* Enable the OC4A output */ - DDRC |= _BV(PORTC6); - - TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs - - TCCR3A = 0x0; // Options not needed - TCCR3B = _BV(CS31) | _BV(CS30) | _BV(WGM32); // 64th prescaling and CTC - OCR3A = SAMPLE_DIVIDER - 1; // Correct count/compare, related to sample playback - #else - DDRC |= _BV(PORTC6); - - TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs - - TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); - TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30); - #endif -} +#ifdef VIBRATO_ENABLE float mod(float a, int b) { @@ -282,6 +297,8 @@ float vibrato(float average_freq) { return vibrated_freq; } +#endif + ISR(TIMER3_COMPA_vect) { if (note) { #ifdef PWM_AUDIO @@ -333,6 +350,7 @@ ISR(TIMER3_COMPA_vect) { } #else if (voices > 0) { + float freq; if (polyphony_rate > 0) { if (voices > 1) { voice_place %= voices; @@ -341,9 +359,13 @@ ISR(TIMER3_COMPA_vect) { place = 0.0; } } + #ifdef VIBRATO_ENABLE if (vibrato_strength > 0) { freq = vibrato(frequencies[voice_place]); } else { + #else + { + #endif freq = frequencies[voice_place]; } } else { @@ -355,9 +377,14 @@ ISR(TIMER3_COMPA_vect) { frequency = frequencies[voices - 1]; } + + #ifdef VIBRATO_ENABLE if (vibrato_strength > 0) { freq = vibrato(frequency); } else { + #else + { + #endif freq = frequency; } } @@ -390,9 +417,13 @@ ISR(TIMER3_COMPA_vect) { if (note_frequency > 0) { float freq; + #ifdef VIBRATO_ENABLE if (vibrato_strength > 0) { freq = vibrato(note_frequency); } else { + #else + { + #endif freq = note_frequency; } @@ -453,10 +484,45 @@ ISR(TIMER3_COMPA_vect) { } } -void play_notes(float (*np)[][2], uint8_t n_count, bool n_repeat, float n_rest) { +void play_note(float freq, int vol) { + + if (!inited) { + audio_init(); + } + +if (audio_config.enable && voices < 8) { + TIMSK3 &= ~_BV(OCIE3A); + // Cancel notes if notes are playing + if (notes) + stop_all_notes(); + note = true; + #ifdef PWM_AUDIO + freq = freq / SAMPLE_RATE; + #endif + if (freq > 0) { + frequencies[voices] = freq; + volumes[voices] = vol; + voices++; + } + + #ifdef PWM_AUDIO + TIMSK3 |= _BV(OCIE3A); + #else + TIMSK3 |= _BV(OCIE3A); + TCCR3A |= _BV(COM3A1); + #endif +} + +} + +void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest) { + + if (!inited) { + audio_init(); + } if (audio_config.enable) { - cli(); + TIMSK3 &= ~_BV(OCIE3A); // Cancel note if a note is playing if (note) stop_all_notes(); @@ -485,57 +551,28 @@ if (audio_config.enable) { TIMSK3 |= _BV(OCIE3A); TCCR3A |= _BV(COM3A1); #endif - sei(); } } +#ifdef PWM_AUDIO void play_sample(uint8_t * s, uint16_t l, bool r) { + if (!inited) { + audio_init(); + } -if (audio_config.enable) { - - stop_all_notes(); - place_int = 0; - sample = s; - sample_length = l; - repeat = r; - - #ifdef PWM_AUDIO - TIMSK3 |= _BV(OCIE3A); - #else - #endif - -} - -} - -void play_note(double freq, int vol) { - -if (audio_config.enable && voices < 8) { - cli(); - // Cancel notes if notes are playing - if (notes) + if (audio_config.enable) { + TIMSK3 &= ~_BV(OCIE3A); stop_all_notes(); - note = true; - #ifdef PWM_AUDIO - freq = freq / SAMPLE_RATE; - #endif - if (freq > 0) { - frequencies[voices] = freq; - volumes[voices] = vol; - voices++; - } + place_int = 0; + sample = s; + sample_length = l; + repeat = r; - #ifdef PWM_AUDIO - TIMSK3 |= _BV(OCIE3A); - #else TIMSK3 |= _BV(OCIE3A); - TCCR3A |= _BV(COM3A1); - #endif - sei(); -} - + } } +#endif //------------------------------------------------------------------------------ // Override these functions in your keymap file to play different tunes on @@ -545,8 +582,11 @@ void play_startup_tone() { } + + __attribute__ ((weak)) void play_goodbye_tone() { + } //------------------------------------------------------------------------------ |