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circuitpython/nrf5/modules/music/modmusic.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mphal.h"
#if MICROPY_PY_MUSIC
// #include "microbitobj.h"
// #include "microbitmusic.h"
#include "py/obj.h"
#include "py/runtime.h"
#include "py/objstr.h"
#include "modmusic.h"
#include "musictunes.h"
#include "drivers/pwm.h"
#include "pin.h"
#include "genhdr/pins.h"
#define DEFAULT_BPM 120
#define DEFAULT_TICKS 4 // i.e. 4 ticks per beat
#define DEFAULT_OCTAVE 4 // C4 is middle C
#define DEFAULT_DURATION 4 // Crotchet
#define ARTICULATION_MS 10 // articulation between notes in milliseconds
typedef struct _music_data_t {
uint16_t bpm;
uint16_t ticks;
// store these to simplify the writing process
uint8_t last_octave;
uint8_t last_duration;
// Asynchronous parts.
volatile uint8_t async_state;
bool async_loop;
uint32_t async_wait_ticks;
uint16_t async_notes_len;
uint16_t async_notes_index;
const pin_obj_t *async_pin;
mp_obj_t async_note;
} music_data_t;
enum {
ASYNC_MUSIC_STATE_IDLE,
ASYNC_MUSIC_STATE_NEXT_NOTE,
ASYNC_MUSIC_STATE_ARTICULATE,
};
#define music_data MP_STATE_PORT(music_data)
// extern uint32_t ticks;
static uint32_t ticks = 0; // TODO
STATIC uint32_t start_note(const char *note_str, size_t note_len, const pin_obj_t *pin);
void microbit_music_tick(void) {
if (music_data == NULL) {
// music module not yet imported
return;
}
if (music_data->async_state == ASYNC_MUSIC_STATE_IDLE) {
// nothing to do
return;
}
if (ticks < music_data->async_wait_ticks) {
// need to wait for timeout to expire
return;
}
if (music_data->async_state == ASYNC_MUSIC_STATE_ARTICULATE) {
// turn off output and rest
pwm_set_duty_cycle(music_data->async_pin->pin, 0); // TODO: remove pin setting.
music_data->async_wait_ticks = ticks + ARTICULATION_MS;
music_data->async_state = ASYNC_MUSIC_STATE_NEXT_NOTE;
} else if (music_data->async_state == ASYNC_MUSIC_STATE_NEXT_NOTE) {
// play next note
if (music_data->async_notes_index >= music_data->async_notes_len) {
if (music_data->async_loop) {
music_data->async_notes_index = 0;
} else {
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
// TODO: microbit_obj_pin_free(music_data->async_pin);
music_data->async_pin = NULL;
return;
}
}
mp_obj_t note;
if (music_data->async_notes_len == 1) {
note = music_data->async_note;
} else {
note = ((mp_obj_t*)music_data->async_note)[music_data->async_notes_index];
}
if (note == mp_const_none) {
// a rest (is this even used anymore?)
pwm_set_duty_cycle(music_data->async_pin->pin, 0); // TODO: remove pin setting.
music_data->async_wait_ticks = 60000 / music_data->bpm;
music_data->async_state = ASYNC_MUSIC_STATE_NEXT_NOTE;
} else {
// a note
mp_uint_t note_len;
const char *note_str = mp_obj_str_get_data(note, &note_len);
uint32_t delay_on = start_note(note_str, note_len, music_data->async_pin);
music_data->async_wait_ticks = ticks + delay_on;
music_data->async_notes_index += 1;
music_data->async_state = ASYNC_MUSIC_STATE_ARTICULATE;
}
}
}
STATIC void wait_async_music_idle(void) {
// wait for the async music state to become idle
while (music_data->async_state != ASYNC_MUSIC_STATE_IDLE) {
// allow CTRL-C to stop the music
if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL) {
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
pwm_set_duty_cycle(music_data->async_pin->pin, 0); // TODO: remove pin setting.
break;
}
}
}
STATIC uint32_t start_note(const char *note_str, size_t note_len, const pin_obj_t *pin) {
pwm_set_duty_cycle(pin->pin, 128); // TODO: remove pin setting.
// [NOTE](#|b)(octave)(:length)
// technically, c4 is middle c, so we'll go with that...
// if we define A as 0 and G as 7, then we can use the following
// array of us periods
// these are the periods of note4 (the octave ascending from middle c) from A->B then C->G
STATIC uint16_t periods_us[] = {2273, 2025, 3822, 3405, 3034, 2863, 2551};
// A#, -, C#, D#, -, F#, G#
STATIC uint16_t periods_sharps_us[] = {2145, 0, 3608, 3214, 0, 2703, 2408};
// we'll represent the note as an integer (A=0, G=6)
// TODO: validate the note
uint8_t note_index = (note_str[0] & 0x1f) - 1;
// TODO: the duration and bpm should be persistent between notes
uint32_t ms_per_tick = (60000 / music_data->bpm) / music_data->ticks;
int8_t octave = 0;
bool sharp = false;
size_t current_position = 1;
// parse sharp or flat
if (current_position < note_len && (note_str[current_position] == '#' || note_str[current_position] == 'b')) {
if (note_str[current_position] == 'b') {
// make sure we handle wrapping round gracefully
if (note_index == 0) {
note_index = 6;
} else {
note_index--;
}
// handle the unusual edge case of Cb
if (note_index == 1) {
octave--;
}
}
sharp = true;
current_position++;
}
// parse the octave
if (current_position < note_len && note_str[current_position] != ':') {
// currently this will only work with a one digit number
// use +=, since the sharp/flat code changes octave to compensate.
music_data->last_octave = (note_str[current_position] & 0xf);
current_position++;
}
octave += music_data->last_octave;
// parse the duration
if (current_position < note_len && note_str[current_position] == ':') {
// I'll make this handle up to two digits for the time being.
current_position++;
if (current_position < note_len) {
music_data->last_duration = note_str[current_position] & 0xf;
current_position++;
if (current_position < note_len) {
music_data->last_duration *= 10;
music_data->last_duration += note_str[current_position] & 0xf;
}
} else {
// technically, this should be a syntax error, since this means
// that no duration has been specified. For the time being,
// we'll let you off :D
}
}
// play the note!
// make the octave relative to octave 4
octave -= 4;
// 18 is 'r' or 'R'
if (note_index < 10) {
uint32_t period;
if (sharp) {
if (octave >= 0) {
period = periods_sharps_us[note_index] >> octave;
}
else {
period = periods_sharps_us[note_index] << -octave;
}
} else {
if (octave >= 0) {
period = periods_us[note_index] >> octave;
}
else {
period = periods_us[note_index] << -octave;
}
}
pwm_set_period_us(period);
} else {
pwm_set_duty_cycle(pin->pin, 0); // TODO: remove pin setting.
}
// Cut off a short time from end of note so we hear articulation.
mp_int_t gap_ms = (ms_per_tick * music_data->last_duration) - ARTICULATION_MS;
if (gap_ms < ARTICULATION_MS) {
gap_ms = ARTICULATION_MS;
}
return gap_ms;
}
STATIC mp_obj_t microbit_music_reset(void) {
music_data->bpm = DEFAULT_BPM;
music_data->ticks = DEFAULT_TICKS;
music_data->last_octave = DEFAULT_OCTAVE;
music_data->last_duration = DEFAULT_DURATION;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(microbit_music_reset_obj, microbit_music_reset);
STATIC mp_obj_t microbit_music_get_tempo(void) {
mp_obj_t tempo_tuple[2];
tempo_tuple[0] = mp_obj_new_int(music_data->bpm);
tempo_tuple[1] = mp_obj_new_int(music_data->ticks);
return mp_obj_new_tuple(2, tempo_tuple);
}
MP_DEFINE_CONST_FUN_OBJ_0(microbit_music_get_tempo_obj, microbit_music_get_tempo);
STATIC mp_obj_t microbit_music_stop(mp_uint_t n_args, const mp_obj_t *args) {
const pin_obj_t *pin;
if (n_args == 0) {
#ifdef MICROPY_HW_MUSIC_PIN
pin = &MICROPY_HW_MUSIC_PIN;
#else
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "pin parameter not given"));
#endif
} else {
pin = (pin_obj_t *)args[0];
}
(void)pin;
// Raise exception if the pin we are trying to stop is not in a compatible mode.
// TODO: microbit_obj_pin_acquire(pin, microbit_pin_mode_music);
pwm_set_duty_cycle(pin->pin, 0); // TODO: remove pin setting.
// TODO: microbit_obj_pin_free(pin);
music_data->async_pin = NULL;
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(microbit_music_stop_obj, 0, 1, microbit_music_stop);
STATIC mp_obj_t microbit_music_play(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_music, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
// TODO:{ MP_QSTR_pin, MP_ARG_OBJ, {.u_obj = (mp_obj_t)&microbit_p0_obj} },
{ MP_QSTR_pin, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_wait, MP_ARG_BOOL, {.u_bool = true} },
{ MP_QSTR_loop, MP_ARG_BOOL, {.u_bool = false} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// reset octave and duration so tunes always play the same
music_data->last_octave = DEFAULT_OCTAVE;
music_data->last_duration = DEFAULT_DURATION;
// get either a single note or a list of notes
mp_uint_t len;
mp_obj_t *items;
if (MP_OBJ_IS_STR_OR_BYTES(args[0].u_obj)) {
len = 1;
items = &args[0].u_obj;
} else {
mp_obj_get_array(args[0].u_obj, &len, &items);
}
// Release the previous pin
// TODO: microbit_obj_pin_free(music_data->async_pin);
music_data->async_pin = NULL;
// get the pin to play on
const pin_obj_t *pin;
if (n_args >= 2) {
#ifdef MICROPY_HW_MUSIC_PIN
pin = &MICROPY_HW_MUSIC_PIN;
#else
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "pin parameter not given"));
#endif
} else {
pin = (pin_obj_t *)args[1].u_obj;
}
// TODO: microbit_obj_pin_acquire(pin, microbit_pin_mode_music);
// start the tune running in the background
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
music_data->async_wait_ticks = ticks;
music_data->async_loop = args[3].u_bool;
music_data->async_notes_len = len;
music_data->async_notes_index = 0;
if (len == 1) {
// If a string was passed as a single note then we can't store a pointer
// to args[0].u_obj, so instead store the single string directly (also
// works if a tuple/list of one element was passed).
music_data->async_note = items[0];
} else {
music_data->async_note = items;
}
music_data->async_pin = pin;
music_data->async_state = ASYNC_MUSIC_STATE_NEXT_NOTE;
if (args[2].u_bool) {
// wait for tune to finish
wait_async_music_idle();
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(microbit_music_play_obj, 0, microbit_music_play);
STATIC mp_obj_t microbit_music_pitch(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_frequency, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_duration, MP_ARG_INT, {.u_int = -1} },
//TODO: { MP_QSTR_pin, MP_ARG_OBJ, {.u_obj = (mp_obj_t)&microbit_p0_obj} },
{ MP_QSTR_pin, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_wait, MP_ARG_BOOL, {.u_bool = true} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// get the parameters
mp_uint_t frequency = args[0].u_int;
mp_int_t duration = args[1].u_int;
const pin_obj_t *pin = args[2].u_obj;
(void)pin;
// Update pin modes
//TODO: microbit_obj_pin_free(music_data->async_pin);
music_data->async_pin = NULL;
//TODO: microbit_obj_pin_acquire(pin, microbit_pin_mode_music);
bool wait = args[3].u_bool;
pwm_set_duty_cycle(pin->pin, 128); // TODO: remove pin setting.
if (frequency == 0) {
//TODO: pwm_release(pin->name);
} else if (pwm_set_period_us(1000000/frequency)) {
pwm_release(pin->pin); // TODO: remove pin setting.
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid pitch"));
}
if (duration >= 0) {
// use async machinery to stop the pitch after the duration
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
music_data->async_wait_ticks = ticks + duration;
music_data->async_loop = false;
music_data->async_notes_len = 0;
music_data->async_notes_index = 0;
music_data->async_note = NULL;
music_data->async_pin = pin;
music_data->async_state = ASYNC_MUSIC_STATE_ARTICULATE;
if (wait) {
// wait for the pitch to finish
wait_async_music_idle();
}
} else {
// don't block here, since there's no reason to leave a pitch forever in a blocking C function
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(microbit_music_pitch_obj, 0, microbit_music_pitch);
STATIC mp_obj_t microbit_music_set_tempo(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_ticks, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_bpm, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
if (args[0].u_int != 0) {
// set ticks
music_data->ticks = args[0].u_int;
}
if (args[1].u_int != 0) {
music_data->bpm = args[1].u_int;
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(microbit_music_set_tempo_obj, 0, microbit_music_set_tempo);
static mp_obj_t music_init(void) {
music_data = m_new_obj(music_data_t);
music_data->bpm = DEFAULT_BPM;
music_data->ticks = DEFAULT_TICKS;
music_data->last_octave = DEFAULT_OCTAVE;
music_data->last_duration = DEFAULT_DURATION;
music_data->async_state = ASYNC_MUSIC_STATE_IDLE;
music_data->async_pin = NULL;
music_data->async_note = NULL;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(music___init___obj, music_init);
STATIC const mp_rom_map_elem_t microbit_music_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR___init__), MP_ROM_PTR(&music___init___obj) },
{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&microbit_music_reset_obj) },
{ MP_ROM_QSTR(MP_QSTR_set_tempo), MP_ROM_PTR(&microbit_music_set_tempo_obj) },
{ MP_ROM_QSTR(MP_QSTR_get_tempo), MP_ROM_PTR(&microbit_music_get_tempo_obj) },
{ MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&microbit_music_play_obj) },
{ MP_ROM_QSTR(MP_QSTR_pitch), MP_ROM_PTR(&microbit_music_pitch_obj) },
{ MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&microbit_music_stop_obj) },
{ MP_ROM_QSTR(MP_QSTR_DADADADUM), MP_ROM_PTR(&microbit_music_tune_dadadadum_obj) },
{ MP_ROM_QSTR(MP_QSTR_ENTERTAINER), MP_ROM_PTR(&microbit_music_tune_entertainer_obj) },
{ MP_ROM_QSTR(MP_QSTR_PRELUDE), MP_ROM_PTR(&microbit_music_tune_prelude_obj) },
{ MP_ROM_QSTR(MP_QSTR_ODE), MP_ROM_PTR(&microbit_music_tune_ode_obj) },
{ MP_ROM_QSTR(MP_QSTR_NYAN), MP_ROM_PTR(&microbit_music_tune_nyan_obj) },
{ MP_ROM_QSTR(MP_QSTR_RINGTONE), MP_ROM_PTR(&microbit_music_tune_ringtone_obj) },
{ MP_ROM_QSTR(MP_QSTR_FUNK), MP_ROM_PTR(&microbit_music_tune_funk_obj) },
{ MP_ROM_QSTR(MP_QSTR_BLUES), MP_ROM_PTR(&microbit_music_tune_blues_obj) },
{ MP_ROM_QSTR(MP_QSTR_BIRTHDAY), MP_ROM_PTR(&microbit_music_tune_birthday_obj) },
{ MP_ROM_QSTR(MP_QSTR_WEDDING), MP_ROM_PTR(&microbit_music_tune_wedding_obj) },
{ MP_ROM_QSTR(MP_QSTR_FUNERAL), MP_ROM_PTR(&microbit_music_tune_funeral_obj) },
{ MP_ROM_QSTR(MP_QSTR_PUNCHLINE), MP_ROM_PTR(&microbit_music_tune_punchline_obj) },
{ MP_ROM_QSTR(MP_QSTR_PYTHON), MP_ROM_PTR(&microbit_music_tune_python_obj) },
{ MP_ROM_QSTR(MP_QSTR_BADDY), MP_ROM_PTR(&microbit_music_tune_baddy_obj) },
{ MP_ROM_QSTR(MP_QSTR_CHASE), MP_ROM_PTR(&microbit_music_tune_chase_obj) },
{ MP_ROM_QSTR(MP_QSTR_BA_DING), MP_ROM_PTR(&microbit_music_tune_ba_ding_obj) },
{ MP_ROM_QSTR(MP_QSTR_WAWAWAWAA), MP_ROM_PTR(&microbit_music_tune_wawawawaa_obj) },
{ MP_ROM_QSTR(MP_QSTR_JUMP_UP), MP_ROM_PTR(&microbit_music_tune_jump_up_obj) },
{ MP_ROM_QSTR(MP_QSTR_JUMP_DOWN), MP_ROM_PTR(&microbit_music_tune_jump_down_obj) },
{ MP_ROM_QSTR(MP_QSTR_POWER_UP), MP_ROM_PTR(&microbit_music_tune_power_up_obj) },
{ MP_ROM_QSTR(MP_QSTR_POWER_DOWN), MP_ROM_PTR(&microbit_music_tune_power_down_obj) },
};
STATIC MP_DEFINE_CONST_DICT(microbit_music_locals_dict, microbit_music_locals_dict_table);
const mp_obj_module_t music_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&microbit_music_locals_dict,
};
#endif // MICROPY_PY_MUSIC
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