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-rw-r--r--quantum/audio.c362
1 files changed, 0 insertions, 362 deletions
diff --git a/quantum/audio.c b/quantum/audio.c
deleted file mode 100644
index 3a3a1a491..000000000
--- a/quantum/audio.c
+++ /dev/null
@@ -1,362 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-#include <avr/io.h>
-
-#include "audio.h"
-#include "keymap_common.h"
-
-#define PI 3.14159265
-
-// #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
-#endif
-
-void delay_us(int count) {
- while(count--) {
- _delay_us(1);
- }
-}
-
-int voices = 0;
-int voice_place = 0;
-double frequency = 0;
-int volume = 0;
-long position = 0;
-
-double 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;
-
-
-bool notes = false;
-bool note = false;
-float note_frequency = 0;
-float note_length = 0;
-uint16_t note_position = 0;
-float (* notes_pointer)[][2];
-uint8_t notes_length;
-bool notes_repeat;
-uint8_t current_note = 0;
-
-void stop_all_notes() {
- voices = 0;
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- notes = false;
- note = false;
- frequency = 0;
- volume = 0;
-
- for (int i = 0; i < 8; i++) {
- frequencies[i] = 0;
- volumes[i] = 0;
- }
-}
-
-void stop_note(double freq) {
- #ifdef PWM_AUDIO
- freq = freq / SAMPLE_RATE;
- #endif
- for (int i = 7; i >= 0; i--) {
- if (frequencies[i] == freq) {
- frequencies[i] = 0;
- volumes[i] = 0;
- for (int j = i; (j < 7); j++) {
- frequencies[j] = frequencies[j+1];
- frequencies[j+1] = 0;
- volumes[j] = volumes[j+1];
- volumes[j+1] = 0;
- }
- }
- }
- voices--;
- if (voices < 0)
- voices = 0;
- if (voices == 0) {
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- frequency = 0;
- volume = 0;
- note = false;
- } else {
- double freq = frequencies[voices - 1];
- int vol = volumes[voices - 1];
- double starting_f = frequency;
- if (frequency < freq) {
- sliding = true;
- for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
- frequency = f;
- }
- sliding = false;
- } else if (frequency > freq) {
- sliding = true;
- for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
- frequency = f;
- }
- sliding = false;
- }
- frequency = freq;
- volume = vol;
- }
-}
-
-void init_notes() {
-
- #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
-}
-
-
-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 (frequency > 0) {
- // ICR3 = (int)(((double)F_CPU) / frequency); // Set max to the period
- // OCR3A = (int)(((double)F_CPU) / frequency) >> 1; // Set compare to half the period
- if (place > 10) {
- voice_place = (voice_place + 1) % voices;
- place = 0.0;
- }
- ICR3 = (int)(((double)F_CPU) / frequencies[voice_place]); // Set max to the period
- OCR3A = (int)(((double)F_CPU) / frequencies[voice_place]) >> 1; // Set compare to half the period
- place++;
- }
- #endif
- }
-
- // 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) {
- ICR3 = (int)(((double)F_CPU) / note_frequency); // Set max to the period
- OCR3A = (int)(((double)F_CPU) / note_frequency) >> 1; // Set compare to half the period
- }
- #endif
-
-
- note_position++;
- if (note_position >= note_length) {
- current_note++;
- if (current_note >= notes_length) {
- if (notes_repeat) {
- current_note = 0;
- } else {
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- notes = false;
- return;
- }
- }
- #ifdef PWM_AUDIO
- note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1];
- #else
- note_frequency = (*notes_pointer)[current_note][0];
- note_length = (*notes_pointer)[current_note][1] / 4;
- #endif
- note_position = 0;
- }
-
- }
-
-}
-
-void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) {
- if (note)
- stop_all_notes();
- notes = true;
-
- notes_pointer = np;
- notes_length = n_length;
- notes_repeat = n_repeat;
-
- place = 0;
- current_note = 0;
- #ifdef PWM_AUDIO
- note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1];
- #else
- note_frequency = (*notes_pointer)[current_note][0];
- note_length = (*notes_pointer)[current_note][1] / 4;
- #endif
- note_position = 0;
-
-
- #ifdef PWM_AUDIO
- TIMSK3 |= _BV(OCIE3A);
- #else
- TIMSK3 |= _BV(OCIE3A);
- TCCR3A |= _BV(COM3A1);
- #endif
-}
-
-void play_sample(uint8_t * s, uint16_t l, bool r) {
- 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 (notes)
- stop_all_notes();
- note = true;
- #ifdef PWM_AUDIO
- freq = freq / SAMPLE_RATE;
- #endif
- if (freq > 0) {
- if (frequency != 0) {
- double starting_f = frequency;
- if (frequency < freq) {
- for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
- frequency = f;
- }
- } else if (frequency > freq) {
- for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
- frequency = f;
- }
- }
- }
- frequency = freq;
- volume = vol;
-
- frequencies[voices] = frequency;
- volumes[voices] = volume;
- voices++;
- }
-
- #ifdef PWM_AUDIO
- TIMSK3 |= _BV(OCIE3A);
- #else
- TIMSK3 |= _BV(OCIE3A);
- TCCR3A |= _BV(COM3A1);
- #endif
-
-} \ No newline at end of file
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