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Diffstat (limited to 'quantum/audio/audio_pwm.c')
| -rw-r--r-- | quantum/audio/audio_pwm.c | 595 | 
1 files changed, 0 insertions, 595 deletions
| diff --git a/quantum/audio/audio_pwm.c b/quantum/audio/audio_pwm.c deleted file mode 100644 index 545aef6dd7..0000000000 --- a/quantum/audio/audio_pwm.c +++ /dev/null @@ -1,595 +0,0 @@ -/* Copyright 2016 Jack Humbert - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program.  If not, see <http://www.gnu.org/licenses/>. - */ -#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.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; - -uint16_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 -        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; -                } -                break; -            } -        } -        voices--; -        if (voices < 0) voices = 0; -        if (voice_place >= voices) { -            voice_place = 0; -        } -        if (voices == 0) { -#ifdef PWM_AUDIO -            DISABLE_AUDIO_COUNTER_3_ISR; -#else -            DISABLE_AUDIO_COUNTER_3_ISR; -            DISABLE_AUDIO_COUNTER_3_OUTPUT; -#endif -            frequency    = 0; -            volume       = 0; -            playing_note = false; -        } -    } -} - -#ifdef VIBRATO_ENABLE - -float mod(float a, int b) { -    float r = fmod(a, b); -    return r < 0 ? r + b : r; -} - -float vibrato(float average_freq) { -#    ifdef VIBRATO_STRENGTH_ENABLE -    float vibrated_freq = average_freq * pow(vibrato_lut[(int)vibrato_counter], vibrato_strength); -#    else -    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; -} - -#endif - -ISR(TIMER3_COMPA_vect) { -    if (playing_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; -                } -            } - -            if (envelope_index < 65535) { -                envelope_index++; -            } -            freq = voice_envelope(freq); - -            if (freq < 30.517578125) freq = 30.52; -            NOTE_PERIOD     = (int)(((double)F_CPU) / (freq * CPU_PRESCALER));                  // Set max to the period -            NOTE_DUTY_CYCLE = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);  // Set compare to half the period -        } -#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 -    //         DISABLE_AUDIO_COUNTER_3_ISR; - -    if (playing_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 (envelope_index < 65535) { -                envelope_index++; -            } -            freq = voice_envelope(freq); - -            NOTE_PERIOD     = (int)(((double)F_CPU) / (freq * CPU_PRESCALER));                  // Set max to the period -            NOTE_DUTY_CYCLE = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);  // Set compare to half the period -        } else { -            NOTE_PERIOD     = 0; -            NOTE_DUTY_CYCLE = 0; -        } -#endif - -        note_position++; -        bool end_of_note = false; -        if (NOTE_PERIOD > 0) -            end_of_note = (note_position >= (note_length / NOTE_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 { -#ifdef PWM_AUDIO -                    DISABLE_AUDIO_COUNTER_3_ISR; -#else -                    DISABLE_AUDIO_COUNTER_3_ISR; -                    DISABLE_AUDIO_COUNTER_3_OUTPUT; -#endif -                    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; -#ifdef PWM_AUDIO -                note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; -                note_length    = (*notes_pointer)[current_note][1] * (((float)note_tempo) / 100); -#else -                envelope_index = 0; -                note_frequency = (*notes_pointer)[current_note][0]; -                note_length    = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100); -#endif -            } -            note_position = 0; -        } -    } - -    if (!audio_config.enable) { -        playing_notes = false; -        playing_note  = false; -    } -} - -void play_note(float freq, int vol) { -    if (!audio_initialized) { -        audio_init(); -    } - -    if (audio_config.enable && voices < 8) { -        DISABLE_AUDIO_COUNTER_3_ISR; - -        // Cancel notes if notes are playing -        if (playing_notes) stop_all_notes(); - -        playing_note = true; - -        envelope_index = 0; - -#ifdef PWM_AUDIO -        freq = freq / SAMPLE_RATE; -#endif -        if (freq > 0) { -            frequencies[voices] = freq; -            volumes[voices]     = vol; -            voices++; -        } - -#ifdef PWM_AUDIO -        ENABLE_AUDIO_COUNTER_3_ISR; -#else -        ENABLE_AUDIO_COUNTER_3_ISR; -        ENABLE_AUDIO_COUNTER_3_OUTPUT; -#endif -    } -} - -void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest) { -    if (!audio_initialized) { -        audio_init(); -    } - -    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; - -#ifdef PWM_AUDIO -        note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; -        note_length    = (*notes_pointer)[current_note][1] * (((float)note_tempo) / 100); -#else -        note_frequency = (*notes_pointer)[current_note][0]; -        note_length    = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100); -#endif -        note_position = 0; - -#ifdef PWM_AUDIO -        ENABLE_AUDIO_COUNTER_3_ISR; -#else -        ENABLE_AUDIO_COUNTER_3_ISR; -        ENABLE_AUDIO_COUNTER_3_OUTPUT; -#endif -    } -} - -#ifdef PWM_AUDIO -void play_sample(uint8_t* s, uint16_t l, bool r) { -    if (!audio_initialized) { -        audio_init(); -    } - -    if (audio_config.enable) { -        DISABLE_AUDIO_COUNTER_3_ISR; -        stop_all_notes(); -        place_int     = 0; -        sample        = s; -        sample_length = l; -        repeat        = r; - -        ENABLE_AUDIO_COUNTER_3_ISR; -    } -} -#endif - -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 /* VIBRATO_STRENGTH_ENABLE */ - -#endif /* VIBRATO_ENABLE */ - -// 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; -    } -} - -//------------------------------------------------------------------------------ -// Override these functions in your keymap file to play different tunes on -// startup and bootloader jump -__attribute__((weak)) void play_startup_tone() {} - -__attribute__((weak)) void play_goodbye_tone() {} -//------------------------------------------------------------------------------ | 
