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-rw-r--r--quantum/audio.c230
1 files changed, 135 insertions, 95 deletions
diff --git a/quantum/audio.c b/quantum/audio.c
index 8ea1bf6ff..ab3444bc9 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()
{
+
}
//------------------------------------------------------------------------------