diff options
Diffstat (limited to 'quantum/audio/audio_chibios.c')
| -rw-r--r-- | quantum/audio/audio_chibios.c | 702 | 
1 files changed, 0 insertions, 702 deletions
| diff --git a/quantum/audio/audio_chibios.c b/quantum/audio/audio_chibios.c deleted file mode 100644 index 1f147f2c92..0000000000 --- a/quantum/audio/audio_chibios.c +++ /dev/null @@ -1,702 +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 "audio.h" -#include <ch.h> -#include <hal.h> - -#include <string.h> -#include "print.h" -#include "keymap.h" - -#include "eeconfig.h" - -// ----------------------------------------------------------------------------- - -int   voices        = 0; -int   voice_place   = 0; -float frequency     = 0; -float frequency_alt = 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; - -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; -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; -bool     glissando      = true; - -#ifndef STARTUP_SONG -#    define STARTUP_SONG SONG(STARTUP_SOUND) -#endif -float startup_song[][2] = STARTUP_SONG; - -static void gpt_cb8(GPTDriver *gptp); - -#define DAC_BUFFER_SIZE 100 -#ifndef DAC_SAMPLE_MAX -#    define DAC_SAMPLE_MAX 65535U -#endif - -#define START_CHANNEL_1()        \ -    gptStart(&GPTD6, &gpt6cfg1); \ -    gptStartContinuous(&GPTD6, 2U) -#define START_CHANNEL_2()        \ -    gptStart(&GPTD7, &gpt7cfg1); \ -    gptStartContinuous(&GPTD7, 2U) -#define STOP_CHANNEL_1() gptStopTimer(&GPTD6) -#define STOP_CHANNEL_2() gptStopTimer(&GPTD7) -#define RESTART_CHANNEL_1() \ -    STOP_CHANNEL_1();       \ -    START_CHANNEL_1() -#define RESTART_CHANNEL_2() \ -    STOP_CHANNEL_2();       \ -    START_CHANNEL_2() -#define UPDATE_CHANNEL_1_FREQ(freq)              \ -    gpt6cfg1.frequency = freq * DAC_BUFFER_SIZE; \ -    RESTART_CHANNEL_1() -#define UPDATE_CHANNEL_2_FREQ(freq)              \ -    gpt7cfg1.frequency = freq * DAC_BUFFER_SIZE; \ -    RESTART_CHANNEL_2() -#define GET_CHANNEL_1_FREQ (uint16_t)(gpt6cfg1.frequency * DAC_BUFFER_SIZE) -#define GET_CHANNEL_2_FREQ (uint16_t)(gpt7cfg1.frequency * DAC_BUFFER_SIZE) - -/* - * GPT6 configuration. - */ -// static const GPTConfig gpt6cfg1 = { -//   .frequency    = 1000000U, -//   .callback     = NULL, -//   .cr2          = TIM_CR2_MMS_1,    /* MMS = 010 = TRGO on Update Event.    */ -//   .dier         = 0U -// }; - -GPTConfig gpt6cfg1 = {.frequency = 440U * DAC_BUFFER_SIZE, -                      .callback  = NULL, -                      .cr2       = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event.    */ -                      .dier      = 0U}; - -GPTConfig gpt7cfg1 = {.frequency = 440U * DAC_BUFFER_SIZE, -                      .callback  = NULL, -                      .cr2       = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event.    */ -                      .dier      = 0U}; - -GPTConfig gpt8cfg1 = {.frequency = 10, -                      .callback  = gpt_cb8, -                      .cr2       = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event.    */ -                      .dier      = 0U}; - -/* - * DAC test buffer (sine wave). - */ -// static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = { -//   2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437, -//   2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846, -//   2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221, -//   3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544, -//   3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801, -//   3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982, -//   3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078, -//   4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086, -//   4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004, -//   3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837, -//   3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591, -//   3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278, -//   3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912, -//   2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507, -//   2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082, -//   2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657, -//   1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248, -//   1215, 1182, 1150, 1118, 1086, 1055, 1024,  993,  963,  933,  903,  873, -//    844,  816,  787,  759,  732,  705,  678,  651,  626,  600,  575,  550, -//    526,  503,  479,  457,  434,  413,  391,  371,  350,  331,  312,  293, -//    275,  257,  240,  224,  208,  192,  177,  163,  150,  136,  124,  112, -//    101,   90,   80,   70,   61,   53,   45,   38,   32,   26,   20,   16, -//     12,    8,    5,    3,    2,    1,    0,    1,    2,    3,    5,    8, -//     12,   16,   20,   26,   32,   38,   45,   53,   61,   70,   80,   90, -//    101,  112,  124,  136,  150,  163,  177,  192,  208,  224,  240,  257, -//    275,  293,  312,  331,  350,  371,  391,  413,  434,  457,  479,  503, -//    526,  550,  575,  600,  626,  651,  678,  705,  732,  759,  787,  816, -//    844,  873,  903,  933,  963,  993, 1024, 1055, 1086, 1118, 1150, 1182, -//   1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587, -//   1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012 -// }; - -// static const dacsample_t dac_buffer_2[DAC_BUFFER_SIZE] = { -//     12,    8,    5,    3,    2,    1,    0,    1,    2,    3,    5,    8, -//     12,   16,   20,   26,   32,   38,   45,   53,   61,   70,   80,   90, -//    101,  112,  124,  136,  150,  163,  177,  192,  208,  224,  240,  257, -//    275,  293,  312,  331,  350,  371,  391,  413,  434,  457,  479,  503, -//    526,  550,  575,  600,  626,  651,  678,  705,  732,  759,  787,  816, -//    844,  873,  903,  933,  963,  993, 1024, 1055, 1086, 1118, 1150, 1182, -//   1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587, -//   1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012, -//   2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437, -//   2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846, -//   2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221, -//   3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544, -//   3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801, -//   3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982, -//   3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078, -//   4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086, -//   4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004, -//   3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837, -//   3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591, -//   3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278, -//   3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912, -//   2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507, -//   2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082, -//   2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657, -//   1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248, -//   1215, 1182, 1150, 1118, 1086, 1055, 1024,  993,  963,  933,  903,  873, -//    844,  816,  787,  759,  732,  705,  678,  651,  626,  600,  575,  550, -//    526,  503,  479,  457,  434,  413,  391,  371,  350,  331,  312,  293, -//    275,  257,  240,  224,  208,  192,  177,  163,  150,  136,  124,  112, -//    101,   90,   80,   70,   61,   53,   45,   38,   32,   26,   20,   16 -// }; - -// squarewave -static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = { -    // First half is max, second half is 0 -    [0 ... DAC_BUFFER_SIZE / 2 - 1]               = DAC_SAMPLE_MAX, -    [DAC_BUFFER_SIZE / 2 ... DAC_BUFFER_SIZE - 1] = 0, -}; - -// squarewave -static const dacsample_t dac_buffer_2[DAC_BUFFER_SIZE] = { -    // opposite of dac_buffer above -    [0 ... DAC_BUFFER_SIZE / 2 - 1]               = 0, -    [DAC_BUFFER_SIZE / 2 ... DAC_BUFFER_SIZE - 1] = DAC_SAMPLE_MAX, -}; - -/* - * DAC streaming callback. - */ -size_t      nz = 0; -static void end_cb1(DACDriver *dacp) { -    (void)dacp; - -    nz++; -    if ((nz % 1000) == 0) { -        // palTogglePad(GPIOD, GPIOD_LED3); -    } -} - -/* - * DAC error callback. - */ -static void error_cb1(DACDriver *dacp, dacerror_t err) { -    (void)dacp; -    (void)err; - -    chSysHalt("DAC failure"); -} - -static const DACConfig dac1cfg1 = {.init = DAC_SAMPLE_MAX, .datamode = DAC_DHRM_12BIT_RIGHT}; - -static const DACConversionGroup dacgrpcfg1 = {.num_channels = 1U, .end_cb = end_cb1, .error_cb = error_cb1, .trigger = DAC_TRG(0)}; - -static const DACConfig dac1cfg2 = {.init = DAC_SAMPLE_MAX, .datamode = DAC_DHRM_12BIT_RIGHT}; - -static const DACConversionGroup dacgrpcfg2 = {.num_channels = 1U, .end_cb = end_cb1, .error_cb = error_cb1, .trigger = DAC_TRG(0)}; - -void audio_init() { -    if (audio_initialized) { -        return; -    } - -// Check EEPROM -#ifdef EEPROM_ENABLE -    if (!eeconfig_is_enabled()) { -        eeconfig_init(); -    } -    audio_config.raw = eeconfig_read_audio(); -#else  // ARM EEPROM -    audio_config.enable        = true; -#    ifdef AUDIO_CLICKY_ON -    audio_config.clicky_enable = true; -#    endif -#endif  // ARM EEPROM - -    /* -     * Starting DAC1 driver, setting up the output pin as analog as suggested -     * by the Reference Manual. -     */ -    palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG); -    palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_ANALOG); -    dacStart(&DACD1, &dac1cfg1); -    dacStart(&DACD2, &dac1cfg2); - -    /* -     * Starting GPT6/7 driver, it is used for triggering the DAC. -     */ -    START_CHANNEL_1(); -    START_CHANNEL_2(); - -    /* -     * Starting a continuous conversion. -     */ -    dacStartConversion(&DACD1, &dacgrpcfg1, (dacsample_t *)dac_buffer, DAC_BUFFER_SIZE); -    dacStartConversion(&DACD2, &dacgrpcfg2, (dacsample_t *)dac_buffer_2, DAC_BUFFER_SIZE); - -    audio_initialized = true; - -    if (audio_config.enable) { -        PLAY_SONG(startup_song); -    } else { -        stop_all_notes(); -    } -} - -void stop_all_notes() { -    dprintf("audio stop all notes"); - -    if (!audio_initialized) { -        audio_init(); -    } -    voices = 0; - -    gptStopTimer(&GPTD6); -    gptStopTimer(&GPTD7); -    gptStopTimer(&GPTD8); - -    playing_notes = false; -    playing_note  = false; -    frequency     = 0; -    frequency_alt = 0; -    volume        = 0; - -    for (uint8_t i = 0; i < 8; i++) { -        frequencies[i] = 0; -        volumes[i]     = 0; -    } -} - -void stop_note(float freq) { -    dprintf("audio stop note freq=%d", (int)freq); - -    if (playing_note) { -        if (!audio_initialized) { -            audio_init(); -        } -        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) { -            STOP_CHANNEL_1(); -            STOP_CHANNEL_2(); -            gptStopTimer(&GPTD8); -            frequency     = 0; -            frequency_alt = 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 - -static void gpt_cb8(GPTDriver *gptp) { -    float freq; - -    if (playing_note) { -        if (voices > 0) { -            float freq_alt = 0; -            if (voices > 1) { -                if (polyphony_rate == 0) { -                    if (glissando) { -                        if (frequency_alt != 0 && frequency_alt < frequencies[voices - 2] && frequency_alt < frequencies[voices - 2] * pow(2, -440 / frequencies[voices - 2] / 12 / 2)) { -                            frequency_alt = frequency_alt * pow(2, 440 / frequency_alt / 12 / 2); -                        } else if (frequency_alt != 0 && frequency_alt > frequencies[voices - 2] && frequency_alt > frequencies[voices - 2] * pow(2, 440 / frequencies[voices - 2] / 12 / 2)) { -                            frequency_alt = frequency_alt * pow(2, -440 / frequency_alt / 12 / 2); -                        } else { -                            frequency_alt = frequencies[voices - 2]; -                        } -                    } else { -                        frequency_alt = frequencies[voices - 2]; -                    } - -#ifdef VIBRATO_ENABLE -                    if (vibrato_strength > 0) { -                        freq_alt = vibrato(frequency_alt); -                    } else { -                        freq_alt = frequency_alt; -                    } -#else -                    freq_alt = frequency_alt; -#endif -                } - -                if (envelope_index < 65535) { -                    envelope_index++; -                } - -                freq_alt = voice_envelope(freq_alt); - -                if (freq_alt < 30.517578125) { -                    freq_alt = 30.52; -                } - -                if (GET_CHANNEL_2_FREQ != (uint16_t)freq_alt) { -                    UPDATE_CHANNEL_2_FREQ(freq_alt); -                } else { -                    RESTART_CHANNEL_2(); -                } -                // note_timbre; -            } - -            if (polyphony_rate > 0) { -                if (voices > 1) { -                    voice_place %= voices; -                    if (place++ > (frequencies[voice_place] / polyphony_rate)) { -                        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 (glissando) { -                    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]; -                    } -                } 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; -            } - -            if (GET_CHANNEL_1_FREQ != (uint16_t)freq) { -                UPDATE_CHANNEL_1_FREQ(freq); -            } else { -                RESTART_CHANNEL_1(); -            } -            // 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); - -            if (GET_CHANNEL_1_FREQ != (uint16_t)freq) { -                UPDATE_CHANNEL_1_FREQ(freq); -                UPDATE_CHANNEL_2_FREQ(freq); -            } -            // note_timbre; -        } else { -            // gptStopTimer(&GPTD6); -            // gptStopTimer(&GPTD7); -        } - -        note_position++; -        bool end_of_note = false; -        if (GET_CHANNEL_1_FREQ > 0) { -            if (!note_resting) -                end_of_note = (note_position >= (note_length * 8 - 1)); -            else -                end_of_note = (note_position >= (note_length * 8)); -        } else { -            end_of_note = (note_position >= (note_length * 8)); -        } - -        if (end_of_note) { -            current_note++; -            if (current_note >= notes_count) { -                if (notes_repeat) { -                    current_note = 0; -                } else { -                    STOP_CHANNEL_1(); -                    STOP_CHANNEL_2(); -                    // gptStopTimer(&GPTD8); -                    playing_notes = false; -                    return; -                } -            } -            if (!note_resting) { -                note_resting = true; -                current_note--; -                if ((*notes_pointer)[current_note][0] == (*notes_pointer)[current_note + 1][0]) { -                    note_frequency = 0; -                    note_length    = 1; -                } else { -                    note_frequency = (*notes_pointer)[current_note][0]; -                    note_length    = 1; -                } -            } 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; -    } -} - -void play_note(float freq, int vol) { -    dprintf("audio play note freq=%d vol=%d", (int)freq, vol); - -    if (!audio_initialized) { -        audio_init(); -    } - -    if (audio_config.enable && voices < 8) { -        // Cancel notes if notes are playing -        if (playing_notes) { -            stop_all_notes(); -        } - -        playing_note = true; - -        envelope_index = 0; - -        if (freq > 0) { -            frequencies[voices] = freq; -            volumes[voices]     = vol; -            voices++; -        } - -        gptStart(&GPTD8, &gpt8cfg1); -        gptStartContinuous(&GPTD8, 2U); -        RESTART_CHANNEL_1(); -        RESTART_CHANNEL_2(); -    } -} - -void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat) { -    if (!audio_initialized) { -        audio_init(); -    } - -    if (audio_config.enable) { -        // 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; - -        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; - -        gptStart(&GPTD8, &gpt8cfg1); -        gptStartContinuous(&GPTD8, 2U); -        RESTART_CHANNEL_1(); -        RESTART_CHANNEL_2(); -    } -} - -bool is_playing_notes(void) { return playing_notes; } - -bool is_audio_on(void) { return (audio_config.enable != 0); } - -void audio_toggle(void) { -    audio_config.enable ^= 1; -    eeconfig_update_audio(audio_config.raw); -    if (audio_config.enable) { -        audio_on_user(); -    } -} - -void audio_on(void) { -    audio_config.enable = 1; -    eeconfig_update_audio(audio_config.raw); -    audio_on_user(); -} - -void audio_off(void) { -    stop_all_notes(); -    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; -    } -} | 
