/* * This file is part of the Micro Python project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries * * 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 #include "lib/utils/context_manager_helpers.h" #include "py/binary.h" #include "py/objproperty.h" #include "py/runtime.h" #include "shared-bindings/microcontroller/Pin.h" #include "shared-bindings/audiobusio/I2SOut.h" #include "shared-bindings/util.h" //| .. currentmodule:: audiobusio //| //| :class:`I2SOut` -- Output an I2S audio signal //| ======================================================== //| //| I2S is used to output an audio signal on an I2S bus. //| //| .. class:: I2SOut(bit_clock, word_select, data, *, left_justified) //| //| Create a I2SOut object associated with the given pins. //| //| :param ~microcontroller.Pin bit_clock: The bit clock (or serial clock) pin //| :param ~microcontroller.Pin word_select: The word select (or left/right clock) pin //| :param ~microcontroller.Pin data: The data pin //| :param bool left_justified: True when data bits are aligned with the word select clock. False //| when they are shifted by one to match classic I2S protocol. //| //| Simple 8ksps 440 Hz sine wave on `Metro M0 Express `_ //| using `UDA1334 Breakout `_:: //| //| import audiobusio //| import audioio //| import board //| import array //| import time //| import math //| //| # Generate one period of sine wav. //| length = 8000 // 440 //| sine_wave = array.array("H", [0] * length) //| for i in range(length): //| sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15) //| //| sine_wave = audiobusio.RawSample(sine_wave, sample_rate=8000) //| i2s = audiobusio.I2SOut(board.D1, board.D0, board.D9) //| i2s.play(sine_wave, loop=True) //| time.sleep(1) //| i2s.stop() //| //| Playing a wave file from flash:: //| //| import board //| import audioio //| import audiobusio //| import digitalio //| //| //| f = open("cplay-5.1-16bit-16khz.wav", "rb") //| wav = audioio.WaveFile(f) //| //| a = audiobusio.I2SOut(board.D1, board.D0, board.D9) //| //| print("playing") //| a.play(wav) //| while a.playing: //| pass //| print("stopped") //| STATIC mp_obj_t audiobusio_i2sout_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *pos_args) { mp_arg_check_num(n_args, n_kw, 3, 4, true); mp_map_t kw_args; mp_map_init_fixed_table(&kw_args, n_kw, pos_args + n_args); enum { ARG_bit_clock, ARG_word_select, ARG_data, ARG_left_justified }; static const mp_arg_t allowed_args[] = { { MP_QSTR_bit_clock, MP_ARG_OBJ | MP_ARG_REQUIRED }, { MP_QSTR_word_select, MP_ARG_OBJ | MP_ARG_REQUIRED }, { MP_QSTR_data, MP_ARG_OBJ | MP_ARG_REQUIRED }, { MP_QSTR_left_justified, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_bool = false} }, }; 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); mp_obj_t bit_clock_obj = args[ARG_bit_clock].u_obj; assert_pin(bit_clock_obj, false); const mcu_pin_obj_t *bit_clock = MP_OBJ_TO_PTR(bit_clock_obj); mp_obj_t word_select_obj = args[ARG_word_select].u_obj; assert_pin(word_select_obj, false); const mcu_pin_obj_t *word_select = MP_OBJ_TO_PTR(word_select_obj); mp_obj_t data_obj = args[ARG_data].u_obj; assert_pin(data_obj, false); const mcu_pin_obj_t *data = MP_OBJ_TO_PTR(data_obj); audiobusio_i2sout_obj_t *self = m_new_obj(audiobusio_i2sout_obj_t); self->base.type = &audiobusio_i2sout_type; common_hal_audiobusio_i2sout_construct(self, bit_clock, word_select, data, args[ARG_left_justified].u_bool); return MP_OBJ_FROM_PTR(self); } //| .. method:: deinit() //| //| Deinitialises the I2SOut and releases any hardware resources for reuse. //| STATIC mp_obj_t audiobusio_i2sout_deinit(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); common_hal_audiobusio_i2sout_deinit(self); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_deinit_obj, audiobusio_i2sout_deinit); //| .. method:: __enter__() //| //| No-op used by Context Managers. //| // Provided by context manager helper. //| .. method:: __exit__() //| //| Automatically deinitializes the hardware when exiting a context. See //| :ref:`lifetime-and-contextmanagers` for more info. //| STATIC mp_obj_t audiobusio_i2sout_obj___exit__(size_t n_args, const mp_obj_t *args) { (void)n_args; common_hal_audiobusio_i2sout_deinit(args[0]); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiobusio_i2sout___exit___obj, 4, 4, audiobusio_i2sout_obj___exit__); //| .. method:: play(sample, *, loop=False) //| //| Plays the sample once when loop=False and continuously when loop=True. //| Does not block. Use `playing` to block. //| //| Sample must be an `audioio.WaveFile` or `audioio.RawSample`. //| //| The sample itself should consist of 8 bit or 16 bit samples. //| STATIC mp_obj_t audiobusio_i2sout_obj_play(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { enum { ARG_sample, ARG_loop }; static const mp_arg_t allowed_args[] = { { MP_QSTR_sample, MP_ARG_OBJ | MP_ARG_REQUIRED }, { MP_QSTR_loop, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = false} }, }; audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); mp_obj_t sample = args[ARG_sample].u_obj; common_hal_audiobusio_i2sout_play(self, sample, args[ARG_loop].u_bool); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_KW(audiobusio_i2sout_play_obj, 1, audiobusio_i2sout_obj_play); //| .. method:: stop() //| //| Stops playback. //| STATIC mp_obj_t audiobusio_i2sout_obj_stop(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); common_hal_audiobusio_i2sout_stop(self); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_stop_obj, audiobusio_i2sout_obj_stop); //| .. attribute:: playing //| //| True when the audio sample is being output. (read-only) //| STATIC mp_obj_t audiobusio_i2sout_obj_get_playing(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); return mp_obj_new_bool(common_hal_audiobusio_i2sout_get_playing(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_get_playing_obj, audiobusio_i2sout_obj_get_playing); const mp_obj_property_t audiobusio_i2sout_playing_obj = { .base.type = &mp_type_property, .proxy = {(mp_obj_t)&audiobusio_i2sout_get_playing_obj, (mp_obj_t)&mp_const_none_obj, (mp_obj_t)&mp_const_none_obj}, }; //| .. method:: pause() //| //| Stops playback temporarily while remembering the position. Use `resume` to resume playback. //| STATIC mp_obj_t audiobusio_i2sout_obj_pause(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); if (!common_hal_audiobusio_i2sout_get_playing(self)) { mp_raise_RuntimeError("Not playing"); } common_hal_audiobusio_i2sout_pause(self); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_pause_obj, audiobusio_i2sout_obj_pause); //| .. method:: resume() //| //| Resumes sample playback after :py:func:`pause`. //| STATIC mp_obj_t audiobusio_i2sout_obj_resume(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); if (common_hal_audiobusio_i2sout_get_paused(self)) { common_hal_audiobusio_i2sout_resume(self); } return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_resume_obj, audiobusio_i2sout_obj_resume); //| .. attribute:: paused //| //| True when playback is paused. (read-only) //| STATIC mp_obj_t audiobusio_i2sout_obj_get_paused(mp_obj_t self_in) { audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in); raise_error_if_deinited(common_hal_audiobusio_i2sout_deinited(self)); return mp_obj_new_bool(common_hal_audiobusio_i2sout_get_paused(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_get_paused_obj, audiobusio_i2sout_obj_get_paused); const mp_obj_property_t audiobusio_i2sout_paused_obj = { .base.type = &mp_type_property, .proxy = {(mp_obj_t)&audiobusio_i2sout_get_paused_obj, (mp_obj_t)&mp_const_none_obj, (mp_obj_t)&mp_const_none_obj}, }; STATIC const mp_rom_map_elem_t audiobusio_i2sout_locals_dict_table[] = { // Methods { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiobusio_i2sout_deinit_obj) }, { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) }, { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiobusio_i2sout___exit___obj) }, { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiobusio_i2sout_play_obj) }, { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiobusio_i2sout_stop_obj) }, { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audiobusio_i2sout_pause_obj) }, { MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&audiobusio_i2sout_resume_obj) }, // Properties { MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audiobusio_i2sout_playing_obj) }, { MP_ROM_QSTR(MP_QSTR_paused), MP_ROM_PTR(&audiobusio_i2sout_paused_obj) }, }; STATIC MP_DEFINE_CONST_DICT(audiobusio_i2sout_locals_dict, audiobusio_i2sout_locals_dict_table); const mp_obj_type_t audiobusio_i2sout_type = { { &mp_type_type }, .name = MP_QSTR_I2SOut, .make_new = audiobusio_i2sout_make_new, .locals_dict = (mp_obj_dict_t*)&audiobusio_i2sout_locals_dict, };