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-rw-r--r--quantum/audio/audio.c766
-rw-r--r--quantum/audio/audio.h6
-rw-r--r--quantum/audio/audio_pwm.c643
-rw-r--r--quantum/audio/frequency_lut.h357
-rw-r--r--quantum/audio/luts.c382
-rw-r--r--quantum/audio/luts.h15
-rw-r--r--quantum/audio/vibrato_lut.h28
-rw-r--r--quantum/audio/voices.c8
-rw-r--r--quantum/audio/voices.h3
-rw-r--r--quantum/keymap_common.c6
-rw-r--r--quantum/quantum.mk1
11 files changed, 1379 insertions, 836 deletions
diff --git a/quantum/audio/audio.c b/quantum/audio/audio.c
index e85370d958..3a7f0f5567 100644
--- a/quantum/audio/audio.c
+++ b/quantum/audio/audio.c
@@ -1,6 +1,6 @@
#include <stdio.h>
#include <string.h>
-#include <math.h>
+//#include <math.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <avr/io.h>
@@ -10,30 +10,28 @@
#include "eeconfig.h"
-#ifdef VIBRATO_ENABLE
- #include "vibrato_lut.h"
-#endif
+#define CPU_PRESCALER 8
-#define PI 3.14159265
+// -----------------------------------------------------------------------------
+// Timer Abstractions
+// -----------------------------------------------------------------------------
-#define CPU_PRESCALER 8
+// 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 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
+// 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));
- float places[8] = {0, 0, 0, 0, 0, 0, 0, 0};
- uint16_t place_int = 0;
- bool repeat = true;
-#endif
+// Fast PWM Mode Controls
+#define TIMER_3_PERIOD ICR3
+#define TIMER_3_DUTY_CYCLE OCR3A
+
+// -----------------------------------------------------------------------------
-void delay_us(int count) {
- while(count--) {
- _delay_us(1);
- }
-}
int voices = 0;
int voice_place = 0;
@@ -45,26 +43,23 @@ 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;
float place = 0;
uint8_t * sample;
uint16_t sample_length = 0;
-// float freq = 0;
-
-bool notes = false;
-bool note = false;
-float note_frequency = 0;
-float note_length = 0;
-float note_tempo = TEMPO_DEFAULT;
-float note_timbre = TIMBRE_DEFAULT;
+
+bool playing_notes = false;
+bool playing_note = false;
+float note_frequency = 0;
+float note_length = 0;
+uint8_t note_tempo = TEMPO_DEFAULT;
+float note_timbre = TIMBRE_DEFAULT;
uint16_t note_position = 0;
float (* notes_pointer)[][2];
uint16_t notes_count;
-bool notes_repeat;
-float notes_rest;
-bool note_resting = false;
+bool notes_repeat;
+float notes_rest;
+bool note_resting = false;
uint8_t current_note = 0;
uint8_t rest_counter = 0;
@@ -77,175 +72,65 @@ float vibrato_rate = 0.125;
float polyphony_rate = 0;
-bool inited = false;
+static bool audio_initialized = false;
audio_config_t audio_config;
uint16_t envelope_index = 0;
-void audio_toggle(void) {
- audio_config.enable ^= 1;
- eeconfig_update_audio(audio_config.raw);
-}
-
-void audio_on(void) {
- audio_config.enable = 1;
- eeconfig_update_audio(audio_config.raw);
-}
-
-void audio_off(void) {
- audio_config.enable = 0;
- eeconfig_update_audio(audio_config.raw);
-}
-
-#ifdef VIBRATO_ENABLE
-// Vibrato rate functions
-
-void set_vibrato_rate(float rate) {
- vibrato_rate = rate;
-}
-
-void increase_vibrato_rate(float change) {
- vibrato_rate *= change;
-}
-
-void decrease_vibrato_rate(float change) {
- vibrato_rate /= change;
-}
-
-#ifdef VIBRATO_STRENGTH_ENABLE
-
-void set_vibrato_strength(float strength) {
- vibrato_strength = strength;
-}
-
-void increase_vibrato_strength(float change) {
- vibrato_strength *= change;
-}
-
-void decrease_vibrato_strength(float change) {
- vibrato_strength /= change;
-}
-
-#endif
-
-#endif
-
-// Polyphony functions
-
-void set_polyphony_rate(float rate) {
- polyphony_rate = rate;
-}
-
-void enable_polyphony() {
- polyphony_rate = 5;
-}
-
-void disable_polyphony() {
- polyphony_rate = 0;
-}
-
-void increase_polyphony_rate(float change) {
- polyphony_rate *= change;
-}
-
-void decrease_polyphony_rate(float change) {
- polyphony_rate /= change;
-}
-
-// Timbre function
-
-void set_timbre(float timbre) {
- note_timbre = timbre;
-}
-
-// Tempo functions
-
-void set_tempo(float tempo) {
- note_tempo = tempo;
-}
-
-void decrease_tempo(uint8_t tempo_change) {
- note_tempo += (float) tempo_change;
-}
-
-void increase_tempo(uint8_t tempo_change) {
- if (note_tempo - (float) tempo_change < 10) {
- note_tempo = 10;
- } else {
- note_tempo -= (float) tempo_change;
- }
-}
-
-void audio_init() {
+void audio_init()
+{
- /* check signature */
- if (!eeconfig_is_enabled()) {
+ // Check EEPROM
+ 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 */
+ // Set port PC6 (OC3A and /OC4A) as output
+ DDRC |= _BV(PORTC6);
- /* 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;
+ DISABLE_AUDIO_COUNTER_3_ISR;
- /* Enable the OC4A output */
- DDRC |= _BV(PORTC6);
+ // 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
+ TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
+ TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
- 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;
+ audio_initialized = true;
}
-void stop_all_notes() {
- if (!inited) {
+void stop_all_notes()
+{
+ if (!audio_initialized) {
audio_init();
}
voices = 0;
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- notes = false;
- note = false;
+
+ DISABLE_AUDIO_COUNTER_3_ISR;
+ DISABLE_AUDIO_COUNTER_3_OUTPUT;
+
+ playing_notes = false;
+ playing_note = false;
frequency = 0;
volume = 0;
- for (int i = 0; i < 8; i++) {
+ for (uint8_t i = 0; i < 8; i++)
+ {
frequencies[i] = 0;
volumes[i] = 0;
}
}
-void stop_note(float freq) {
- if (note) {
- if (!inited) {
+void stop_note(float freq)
+{
+ if (playing_note) {
+ if (!audio_initialized) {
audio_init();
}
- #ifdef PWM_AUDIO
- freq = freq / SAMPLE_RATE;
- #endif
for (int i = 7; i >= 0; i--) {
if (frequencies[i] == freq) {
frequencies[i] = 0;
@@ -266,15 +151,11 @@ void stop_note(float freq) {
voice_place = 0;
}
if (voices == 0) {
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
+ DISABLE_AUDIO_COUNTER_3_ISR;
+ DISABLE_AUDIO_COUNTER_3_OUTPUT;
frequency = 0;
volume = 0;
- note = false;
+ playing_note = false;
}
}
}
@@ -289,9 +170,9 @@ float mod(float a, int b)
float vibrato(float average_freq) {
#ifdef VIBRATO_STRENGTH_ENABLE
- float vibrated_freq = average_freq * pow(VIBRATO_LUT[(int)vibrato_counter], vibrato_strength);
+ float vibrated_freq = average_freq * pow(vibrato_lut[(int)vibrato_counter], vibrato_strength);
#else
- float vibrated_freq = average_freq * VIBRATO_LUT[(int)vibrato_counter];
+ float vibrated_freq = average_freq * vibrato_lut[(int)vibrato_counter];
#endif
vibrato_counter = mod((vibrato_counter + vibrato_rate * (1.0 + 440.0/average_freq)), VIBRATO_LUT_LENGTH);
return vibrated_freq;
@@ -299,295 +180,295 @@ float vibrato(float average_freq) {
#endif
-ISR(TIMER3_COMPA_vect) {
- if (note) {
- #ifdef PWM_AUDIO
- if (voices == 1) {
- // SINE
- OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]) >> 2;
-
- // SQUARE
- // if (((int)place) >= 1024){
- // OCR4A = 0xFF >> 2;
- // } else {
- // OCR4A = 0x00;
- // }
-
- // SAWTOOTH
- // OCR4A = (int)place / 4;
-
- // TRIANGLE
- // if (((int)place) >= 1024) {
- // OCR4A = (int)place / 2;
- // } else {
- // OCR4A = 2048 - (int)place / 2;
- // }
-
- place += frequency;
-
- if (place >= SINE_LENGTH)
- place -= SINE_LENGTH;
-
- } else {
- int sum = 0;
- for (int i = 0; i < voices; i++) {
- // SINE
- sum += pgm_read_byte(&sinewave[(uint16_t)places[i]]) >> 2;
-
- // SQUARE
- // if (((int)places[i]) >= 1024){
- // sum += 0xFF >> 2;
- // } else {
- // sum += 0x00;
- // }
-
- places[i] += frequencies[i];
-
- if (places[i] >= SINE_LENGTH)
- places[i] -= SINE_LENGTH;
- }
- OCR4A = sum;
- }
- #else
- if (voices > 0) {
- float freq;
- 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 {
- #else
- {
- #endif
- freq = frequencies[voice_place];
- }
- } 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 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];
- }
-
-
- #ifdef VIBRATO_ENABLE
- if (vibrato_strength > 0) {
- freq = vibrato(frequency);
- } else {
- #else
- {
- #endif
- freq = frequency;
- }
- }
+ISR(TIMER3_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 (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];
+ }
+
+ #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_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
+ TIMER_3_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_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
+ TIMER_3_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
+ } else {
+ TIMER_3_PERIOD = 0;
+ TIMER_3_DUTY_CYCLE = 0;
+ }
+
+ note_position++;
+ bool end_of_note = false;
+ if (TIMER_3_PERIOD > 0) {
+ end_of_note = (note_position >= (note_length / TIMER_3_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_3_ISR;
+ DISABLE_AUDIO_COUNTER_3_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;
+ }
+}
- if (envelope_index < 65535) {
- envelope_index++;
- }
- freq = voice_envelope(freq);
+void play_note(float freq, int vol) {
- if (freq < 30.517578125)
- freq = 30.52;
- ICR3 = (int)(((double)F_CPU) / (freq * CPU_PRESCALER)); // Set max to the period
- OCR3A = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre); // Set compare to half the period
- }
- #endif
+ if (!audio_initialized) {
+ audio_init();
}
- // SAMPLE
- // OCR4A = pgm_read_byte(&sample[(uint16_t)place_int]);
-
- // place_int++;
-
- // if (place_int >= sample_length)
- // if (repeat)
- // place_int -= sample_length;
- // else
- // TIMSK3 &= ~_BV(OCIE3A);
-
-
- if (notes) {
- #ifdef PWM_AUDIO
- OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]) >> 0;
-
- place += note_frequency;
- if (place >= SINE_LENGTH)
- place -= SINE_LENGTH;
- #else
- if (note_frequency > 0) {
- float freq;
-
- #ifdef VIBRATO_ENABLE
- if (vibrato_strength > 0) {
- freq = vibrato(note_frequency);
- } else {
- #else
- {
- #endif
- freq = note_frequency;
- }
+ if (audio_config.enable && voices < 8) {
+ DISABLE_AUDIO_COUNTER_3_ISR;
- if (envelope_index < 65535) {
- envelope_index++;
- }
- freq = voice_envelope(freq);
+ // Cancel notes if notes are playing
+ if (playing_notes)
+ stop_all_notes();
- ICR3 = (int)(((double)F_CPU) / (freq * CPU_PRESCALER)); // Set max to the period
- OCR3A = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre); // Set compare to half the period
- } else {
- ICR3 = 0;
- OCR3A = 0;
- }
- #endif
-
-
- note_position++;
- bool end_of_note = false;
- if (ICR3 > 0)
- end_of_note = (note_position >= (note_length / ICR3 * 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 {
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- 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;
- #ifdef PWM_AUDIO
- note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1] * (note_tempo / 100);
- #else
- envelope_index = 0;
- note_frequency = (*notes_pointer)[current_note][0];
- note_length = ((*notes_pointer)[current_note][1] / 4) * (note_tempo / 100);
- #endif
- }
- note_position = 0;
- }
+ playing_note = true;
- }
+ envelope_index = 0;
+
+ if (freq > 0) {
+ frequencies[voices] = freq;
+ volumes[voices] = vol;
+ voices++;
+ }
+
+ ENABLE_AUDIO_COUNTER_3_ISR;
+ ENABLE_AUDIO_COUNTER_3_OUTPUT;
+ }
- if (!audio_config.enable) {
- notes = false;
- note = false;
- }
}
-void play_note(float freq, int vol) {
+void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
+{
- if (!inited) {
+ if (!audio_initialized) {
audio_init();
}
-if (audio_config.enable && voices < 8) {
- TIMSK3 &= ~_BV(OCIE3A);
- // Cancel notes if notes are playing
- if (notes)
- stop_all_notes();
- note = true;
- envelope_index = 0;
- #ifdef PWM_AUDIO
- freq = freq / SAMPLE_RATE;
- #endif
- if (freq > 0) {
- frequencies[voices] = freq;
- volumes[voices] = vol;
- voices++;
- }
+ if (audio_config.enable) {
+
+ DISABLE_AUDIO_COUNTER_3_ISR;
+
+ // Cancel note if a note is playing
+ if (playing_note)
+ stop_all_notes();
+
+ playing_notes = true;
+
+ notes_pointer = np;
+ notes_count = n_count;
+ notes_repeat = n_repeat;
+ notes_rest = n_rest;
+
+ place = 0;
+ current_note = 0;
+
+ note_frequency = (*notes_pointer)[current_note][0];
+ note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
+ note_position = 0;
+
+
+ ENABLE_AUDIO_COUNTER_3_ISR;
+ ENABLE_AUDIO_COUNTER_3_OUTPUT;
+ }
- #ifdef PWM_AUDIO
- TIMSK3 |= _BV(OCIE3A);
- #else
- TIMSK3 |= _BV(OCIE3A);
- TCCR3A |= _BV(COM3A1);
- #endif
}
+bool is_playing_notes(void) {
+ return playing_notes;
}
-void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest) {
+void audio_toggle(void) {
+ audio_config.enable ^= 1;
+ eeconfig_update_audio(audio_config.raw);
+}
- if (!inited) {
- audio_init();
- }
+void audio_on(void) {
+ audio_config.enable = 1;
+ eeconfig_update_audio(audio_config.raw);
+}
-if (audio_config.enable) {
- TIMSK3 &= ~_BV(OCIE3A);
- // Cancel note if a note is playing
- if (note)
- stop_all_notes();
- notes = true;
-
- notes_pointer = np;
- notes_count = n_count;
- notes_repeat = n_repeat;
- notes_rest = n_rest;
-
- place = 0;
- current_note = 0;
- #ifdef PWM_AUDIO
- note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1] * (note_tempo / 100);
- #else
- note_frequency = (*notes_pointer)[current_note][0];
- note_length = ((*notes_pointer)[current_note][1] / 4) * (note_tempo / 100);
- #endif
- note_position = 0;
+void audio_off(void) {
+ audio_config.enable = 0;
+ eeconfig_update_audio(audio_config.raw);
+}
+#ifdef VIBRATO_ENABLE
- #ifdef PWM_AUDIO
- TIMSK3 |= _BV(OCIE3A);
- #else
- TIMSK3 |= _BV(OCIE3A);
- TCCR3A |= _BV(COM3A1);
- #endif
+// Vibrato rate functions
+
+void set_vibrato_rate(float rate) {
+ vibrato_rate = rate;
}
+void increase_vibrato_rate(float change) {
+ vibrato_rate *= change;
}
-#ifdef PWM_AUDIO
-void play_sample(uint8_t * s, uint16_t l, bool r) {
- if (!inited) {
- audio_init();
- }
+void decrease_vibrato_rate(float change) {
+ vibrato_rate /= change;
+}
- if (audio_config.enable) {
- TIMSK3 &= ~_BV(OCIE3A);
- stop_all_notes();
- place_int = 0;
- sample = s;
- sample_length = l;
- repeat = r;
+#ifdef VIBRATO_STRENGTH_ENABLE
+
+void set_vibrato_strength(float strength) {
+ vibrato_strength = strength;
+}
+
+void increase_vibrato_strength(float change) {
+ vibrato_strength *= change;
+}
+
+void decrease_vibrato_strength(float change) {
+ vibrato_strength /= change;
+}
+
+#endif /* VIBRATO_STRENGTH_ENABLE */
+
+#endif /* VIBRATO_ENABLE */
- TIMSK3 |= _BV(OCIE3A);
+// Polyphony functions
+
+void set_polyphony_rate(float rate) {
+ polyphony_rate = rate;
+}
+
+void enable_polyphony() {
+ polyphony_rate = 5;
+}
+
+void disable_polyphony() {
+ polyphony_rate = 0;
+}
+
+void increase_polyphony_rate(float change) {
+ polyphony_rate *= change;
+}
+
+void decrease_polyphony_rate(float change) {
+ polyphony_rate /= change;
+}
+
+// Timbre function
+
+void set_timbre(float timbre) {
+ note_timbre = timbre;
+}
+
+// Tempo functions
+
+void set_tempo(uint8_t tempo) {
+ note_tempo = tempo;
+}
+
+void decrease_tempo(uint8_t tempo_change) {
+ note_tempo += tempo_change;
+}
+
+void increase_tempo(uint8_t tempo_change) {
+ if (note_tempo - tempo_change < 10) {
+ note_tempo = 10;
+ } else {
+ note_tempo -= tempo_change;
}
}
-#endif
+
//------------------------------------------------------------------------------
// Override these functions in your keymap file to play different tunes on
@@ -597,11 +478,8 @@ void play_startup_tone()
{
}
-
-
__attribute__ ((weak))
void play_goodbye_tone()
{
-
}
//------------------------------------------------------------------------------
diff --git a/quantum/audio/audio.h b/quantum/audio/audio.h
index 89769507e1..3d706587ab 100644
--- a/quantum/audio/audio.h
+++ b/quantum/audio/audio.h
@@ -56,7 +56,7 @@ void increase_polyphony_rate(float change);
void decrease_polyphony_rate(float change);
void set_timbre(float timbre);
-void set_tempo(float tempo);
+void set_tempo(uint8_t tempo);
void increase_tempo(uint8_t tempo_change);
void decrease_tempo(uint8_t tempo_change);
@@ -83,7 +83,11 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
#define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0]))))
#define PLAY_NOTE_ARRAY(note_array, note_repeat, note_rest_style) play_notes(&note_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat), (note_rest_style));
+
+bool is_playing_notes(void);
void play_goodbye_tone(void);
void play_startup_tone(void);
+
+
#endif \ No newline at end of file
diff --git a/quantum/audio/audio_pwm.c b/quantum/audio/audio_pwm.c
new file mode 100644
index 0000000000..328a253a7e
--- /dev/null
+++ b/quantum/audio/audio_pwm.c
@@ -0,0 +1,643 @@
+#include <stdio.h>
+#include <string.h>
+//#include <math.h>
+#include <avr/pgmspace.h>
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include "print.h"
+#include "audio.h"
+#include "keymap_common.h"
+
+#include "eeconfig.h"
+
+#define PI 3.14159265
+
+#define CPU_PRESCALER 8
+
+
+// Timer Abstractions
+
+// 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)
+
+
+// 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));
+
+
+#define NOTE_PERIOD ICR3
+#define NOTE_DUTY_CYCLE OCR3A
+
+
+#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) {
+ while(count--) {
+ _delay_us(1);
+ }
+}
+
+int voices = 0;
+int voice_place = 0;
+float frequency = 0;
+int volume = 0;
+long position = 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;
+
+float place = 0;
+
+uint8_t * sample;
+uint16_t sample_length = 0;
+// float freq = 0;
+
+bool playing_notes = false;
+bool playing_note = false;
+float note_frequency = 0;
+float note_length = 0;
+uint8_t note_tempo = TEMPO_DEFAULT;
+float note_timbre = TIMBRE_DEFAULT;
+uint16_t note_position = 0;
+float (* notes_pointer)[][2];
+uint16_t notes_count;
+bool notes_repeat;
+float notes_rest;
+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;
+
+static bool audio_initialized = false;
+
+audio_config_t audio_config;
+
+uint16_t envelope_index = 0;
+
+void audio_init() {
+
+ // Check EEPROM
+ 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);
+
+ DISABLE_AUDIO_COUNTER_3_ISR; // 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
+
+ // Set port PC6 (OC3A and /OC4A) as output
+ DDRC |= _BV(PORTC6);
+
+ DISABLE_AUDIO_COUNTER_3_ISR;
+
+ // 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
+ TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
+ TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
+
+ #endif
+
+ audio_initialized = true;
+}
+
+void stop_all_notes() {
+ if (!audio_initialized) {
+ audio_init();
+ }
+ voices = 0;
+ #ifdef PWM_AUDIO
+ DISABLE_AUDIO_COUNTER_3_ISR;
+ #else
+ DISABLE_AUDIO_COUNTER_3_ISR;
+ DISABLE_AUDIO_COUNTER_3_OUTPUT;
+ #endif
+
+ playing_notes = false;
+ playing_note = false;
+ frequency = 0;
+ volume = 0;
+
+ for (uint8_t i = 0; i < 8; i++)
+ {
+ frequencies[i] = 0;
+ volumes[i] = 0;
+ }
+}
+
+void stop_note(float freq)
+{
+ if (playing_note) {
+ if (!audio_initialized) {
+ audio_init();
+ }
+ #ifdef PWM_AUDIO
+ freq = freq / SAMPLE_RATE;
+ #endif
+