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-rw-r--r--py/circuitpy_defns.mk6
-rw-r--r--py/circuitpy_mpconfig.h8
-rw-r--r--py/circuitpy_mpconfig.mk9
-rw-r--r--shared-bindings/audiopwmio/AudioOut.c294
-rw-r--r--shared-bindings/audiopwmio/AudioOut.h49
-rw-r--r--shared-bindings/audiopwmio/__init__.c71
-rw-r--r--shared-bindings/audiopwmio/__init__.h34
-rw-r--r--shared-module/audiopwmio/__init__.c0
-rw-r--r--shared-module/audiopwmio/__init__.h32
9 files changed, 503 insertions, 0 deletions
diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index bdefc18cc..28d560a73 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -108,6 +108,9 @@ endif
ifeq ($(CIRCUITPY_AUDIOIO),1)
SRC_PATTERNS += audioio/%
endif
+ifeq ($(CIRCUITPY_AUDIOPWMIO),1)
+SRC_PATTERNS += audiopwmio/%
+endif
ifeq ($(CIRCUITPY_AUDIOCORE),1)
SRC_PATTERNS += audiocore/%
endif
@@ -223,6 +226,8 @@ $(filter $(SRC_PATTERNS), \
audiobusio/__init__.c \
audiobusio/I2SOut.c \
audiobusio/PDMIn.c \
+ audiopwmio/__init__.c \
+ audiopwmio/AudioOut.c \
audioio/__init__.c \
audioio/AudioOut.c \
bleio/__init__.c \
@@ -303,6 +308,7 @@ $(filter $(SRC_PATTERNS), \
_stage/Layer.c \
_stage/Text.c \
_stage/__init__.c \
+ audiopwmio/__init__.c \
audioio/__init__.c \
audiocore/__init__.c \
audiocore/Mixer.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index 3440eb052..d88d6538e 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -244,6 +244,13 @@ extern const struct _mp_obj_module_t audioio_module;
#define AUDIOIO_MODULE
#endif
+#if CIRCUITPY_AUDIOPWMIO
+#define AUDIOPWMIO_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_audiopwmio), (mp_obj_t)&audiopwmio_module },
+extern const struct _mp_obj_module_t audiopwmio_module;
+#else
+#define AUDIOPWMIO_MODULE
+#endif
+
#if CIRCUITPY_BITBANGIO
#define BITBANGIO_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_bitbangio), (mp_obj_t)&bitbangio_module },
extern const struct _mp_obj_module_t bitbangio_module;
@@ -573,6 +580,7 @@ extern const struct _mp_obj_module_t ustack_module;
AUDIOBUSIO_MODULE \
AUDIOCORE_MODULE \
AUDIOIO_MODULE \
+ AUDIOPWMIO_MODULE \
BITBANGIO_MODULE \
BLEIO_MODULE \
BOARD_MODULE \
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index 772a1c3e1..a408cd7ac 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -74,9 +74,18 @@ CIRCUITPY_AUDIOIO = $(CIRCUITPY_FULL_BUILD)
endif
CFLAGS += -DCIRCUITPY_AUDIOIO=$(CIRCUITPY_AUDIOIO)
+ifndef CIRCUITPY_AUDIOPWMIO
+CIRCUITPY_AUDIOPWMIO = 0
+endif
+CFLAGS += -DCIRCUITPY_AUDIOPWMIO=$(CIRCUITPY_AUDIOPWMIO)
+
ifndef CIRCUITPY_AUDIOCORE
+ifeq ($(CIRCUITPY_AUDIOPWMIO),1)
+CIRCUITPY_AUDIOCORE = $(CIRCUITPY_AUDIOPWMIO)
+else
CIRCUITPY_AUDIOCORE = $(CIRCUITPY_AUDIOIO)
endif
+endif
CFLAGS += -DCIRCUITPY_AUDIOCORE=$(CIRCUITPY_AUDIOCORE)
ifndef CIRCUITPY_BITBANGIO
diff --git a/shared-bindings/audiopwmio/AudioOut.c b/shared-bindings/audiopwmio/AudioOut.c
new file mode 100644
index 000000000..37c845165
--- /dev/null
+++ b/shared-bindings/audiopwmio/AudioOut.c
@@ -0,0 +1,294 @@
+/*
+ * 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 <stdint.h>
+
+#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/audiopwmio/AudioOut.h"
+#include "shared-bindings/audiocore/RawSample.h"
+#include "shared-bindings/util.h"
+#include "supervisor/shared/translate.h"
+
+//| .. currentmodule:: audiopwmio
+//|
+//| :class:`AudioOut` -- Output an analog audio signal
+//| ========================================================
+//|
+//| AudioOut can be used to output an analog audio signal on a given pin.
+//|
+//| .. class:: AudioOut(left_channel, *, right_channel=None, quiescent_value=0x8000)
+//|
+//| Create a AudioOut object associated with the given pin(s). This allows you to
+//| play audio signals out on the given pin(s). In contrast to mod:`audioio`,
+//| the pin(s) specified are digital pins, and are driven with a device-dependent PWM
+//| signal.
+//|
+//| :param ~microcontroller.Pin left_channel: The pin to output the left channel to
+//| :param ~microcontroller.Pin right_channel: The pin to output the right channel to
+//| :param int quiescent_value: The output value when no signal is present. Samples should start
+//| and end with this value to prevent audible popping.
+//|
+//| Simple 8ksps 440 Hz sin wave::
+//|
+//| import audiocore
+//| import audiopwmio
+//| 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)
+//|
+//| dac = audiopwmio.AudioOut(board.SPEAKER)
+//| sine_wave = audiocore.RawSample(sine_wave, sample_rate=8000)
+//| dac.play(sine_wave, loop=True)
+//| time.sleep(1)
+//| dac.stop()
+//|
+//| Playing a wave file from flash::
+//|
+//| import board
+//| import audiocore
+//| import audiopwmio
+//| import digitalio
+//|
+//| # Required for CircuitPlayground Express
+//| speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
+//| speaker_enable.switch_to_output(value=True)
+//|
+//| data = open("cplay-5.1-16bit-16khz.wav", "rb")
+//| wav = audiocore.WaveFile(data)
+//| a = audiopwmio.AudioOut(board.SPEAKER)
+//|
+//| print("playing")
+//| a.play(wav)
+//| while a.playing:
+//| pass
+//| print("stopped")
+//|
+STATIC mp_obj_t audiopwmio_audioout_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+ enum { ARG_left_channel, ARG_right_channel, ARG_quiescent_value };
+ static const mp_arg_t allowed_args[] = {
+ { MP_QSTR_left_channel, MP_ARG_OBJ | MP_ARG_REQUIRED },
+ { MP_QSTR_right_channel, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_rom_obj = mp_const_none} },
+ { MP_QSTR_quiescent_value, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 0x8000} },
+ };
+ 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 left_channel_obj = args[ARG_left_channel].u_obj;
+ assert_pin(left_channel_obj, false);
+ const mcu_pin_obj_t *left_channel_pin = MP_OBJ_TO_PTR(left_channel_obj);
+
+ mp_obj_t right_channel_obj = args[ARG_right_channel].u_obj;
+ const mcu_pin_obj_t *right_channel_pin = NULL;
+ if (right_channel_obj != mp_const_none) {
+ assert_pin(right_channel_obj, false);
+ right_channel_pin = MP_OBJ_TO_PTR(right_channel_obj);
+ }
+
+ // create AudioOut object from the given pin
+ audiopwmio_audioout_obj_t *self = m_new_obj(audiopwmio_audioout_obj_t);
+ self->base.type = &audiopwmio_audioout_type;
+ common_hal_audiopwmio_audioout_construct(self, left_channel_pin, right_channel_pin, args[ARG_quiescent_value].u_int);
+
+ return MP_OBJ_FROM_PTR(self);
+}
+
+//| .. method:: deinit()
+//|
+//| Deinitialises the AudioOut and releases any hardware resources for reuse.
+//|
+STATIC mp_obj_t audiopwmio_audioout_deinit(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ common_hal_audiopwmio_audioout_deinit(self);
+ return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_deinit_obj, audiopwmio_audioout_deinit);
+
+STATIC void check_for_deinit(audiopwmio_audioout_obj_t *self) {
+ if (common_hal_audiopwmio_audioout_deinited(self)) {
+ raise_deinited_error();
+ }
+}
+//| .. 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 audiopwmio_audioout_obj___exit__(size_t n_args, const mp_obj_t *args) {
+ (void)n_args;
+ common_hal_audiopwmio_audioout_deinit(args[0]);
+ return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiopwmio_audioout___exit___obj, 4, 4, audiopwmio_audioout_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 `audiopwmio.WaveFile` or `audiopwmio.RawSample`.
+//|
+//| The sample itself should consist of 16 bit samples. Microcontrollers with a lower output
+//| resolution will use the highest order bits to output. For example, the SAMD21 has a 10 bit
+//| DAC that ignores the lowest 6 bits when playing 16 bit samples.
+//|
+STATIC mp_obj_t audiopwmio_audioout_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} },
+ };
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+ check_for_deinit(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_audiopwmio_audioout_play(self, sample, args[ARG_loop].u_bool);
+
+ return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(audiopwmio_audioout_play_obj, 1, audiopwmio_audioout_obj_play);
+
+//| .. method:: stop()
+//|
+//| Stops playback and resets to the start of the sample.
+//|
+STATIC mp_obj_t audiopwmio_audioout_obj_stop(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ check_for_deinit(self);
+ common_hal_audiopwmio_audioout_stop(self);
+ return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_stop_obj, audiopwmio_audioout_obj_stop);
+
+//| .. attribute:: playing
+//|
+//| True when an audio sample is being output even if `paused`. (read-only)
+//|
+STATIC mp_obj_t audiopwmio_audioout_obj_get_playing(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ check_for_deinit(self);
+ return mp_obj_new_bool(common_hal_audiopwmio_audioout_get_playing(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_get_playing_obj, audiopwmio_audioout_obj_get_playing);
+
+const mp_obj_property_t audiopwmio_audioout_playing_obj = {
+ .base.type = &mp_type_property,
+ .proxy = {(mp_obj_t)&audiopwmio_audioout_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 audiopwmio_audioout_obj_pause(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ check_for_deinit(self);
+
+ if (!common_hal_audiopwmio_audioout_get_playing(self)) {
+ mp_raise_RuntimeError(translate("Not playing"));
+ }
+ common_hal_audiopwmio_audioout_pause(self);
+ return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_pause_obj, audiopwmio_audioout_obj_pause);
+
+//| .. method:: resume()
+//|
+//| Resumes sample playback after :py:func:`pause`.
+//|
+STATIC mp_obj_t audiopwmio_audioout_obj_resume(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ check_for_deinit(self);
+
+ if (common_hal_audiopwmio_audioout_get_paused(self)) {
+ common_hal_audiopwmio_audioout_resume(self);
+ }
+
+ return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_resume_obj, audiopwmio_audioout_obj_resume);
+
+//| .. attribute:: paused
+//|
+//| True when playback is paused. (read-only)
+//|
+STATIC mp_obj_t audiopwmio_audioout_obj_get_paused(mp_obj_t self_in) {
+ audiopwmio_audioout_obj_t *self = MP_OBJ_TO_PTR(self_in);
+ check_for_deinit(self);
+ return mp_obj_new_bool(common_hal_audiopwmio_audioout_get_paused(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(audiopwmio_audioout_get_paused_obj, audiopwmio_audioout_obj_get_paused);
+
+const mp_obj_property_t audiopwmio_audioout_paused_obj = {
+ .base.type = &mp_type_property,
+ .proxy = {(mp_obj_t)&audiopwmio_audioout_get_paused_obj,
+ (mp_obj_t)&mp_const_none_obj,
+ (mp_obj_t)&mp_const_none_obj},
+};
+
+STATIC const mp_rom_map_elem_t audiopwmio_audioout_locals_dict_table[] = {
+ // Methods
+ { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiopwmio_audioout_deinit_obj) },
+ { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
+ { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiopwmio_audioout___exit___obj) },
+ { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiopwmio_audioout_play_obj) },
+ { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiopwmio_audioout_stop_obj) },
+ { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audiopwmio_audioout_pause_obj) },
+ { MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&audiopwmio_audioout_resume_obj) },
+
+ // Properties
+ { MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audiopwmio_audioout_playing_obj) },
+ { MP_ROM_QSTR(MP_QSTR_paused), MP_ROM_PTR(&audiopwmio_audioout_paused_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(audiopwmio_audioout_locals_dict, audiopwmio_audioout_locals_dict_table);
+
+const mp_obj_type_t audiopwmio_audioout_type = {
+ { &mp_type_type },
+ .name = MP_QSTR_PWMAudioOut,
+ .make_new = audiopwmio_audioout_make_new,
+ .locals_dict = (mp_obj_dict_t*)&audiopwmio_audioout_locals_dict,
+};
diff --git a/shared-bindings/audiopwmio/AudioOut.h b/shared-bindings/audiopwmio/AudioOut.h
new file mode 100644
index 000000000..7fb0e0f33
--- /dev/null
+++ b/shared-bindings/audiopwmio/AudioOut.h
@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO_AUDIOOUT_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO_AUDIOOUT_H
+
+#include "common-hal/audiopwmio/AudioOut.h"
+#include "common-hal/microcontroller/Pin.h"
+#include "shared-bindings/audiocore/RawSample.h"
+
+extern const mp_obj_type_t audiopwmio_audioout_type;
+
+// left_channel will always be non-NULL but right_channel may be for mono output.
+void common_hal_audiopwmio_audioout_construct(audiopwmio_audioout_obj_t* self,
+ const mcu_pin_obj_t* left_channel, const mcu_pin_obj_t* right_channel, uint16_t default_value);
+
+void common_hal_audiopwmio_audioout_deinit(audiopwmio_audioout_obj_t* self);
+bool common_hal_audiopwmio_audioout_deinited(audiopwmio_audioout_obj_t* self);
+void common_hal_audiopwmio_audioout_play(audiopwmio_audioout_obj_t* self, mp_obj_t sample, bool loop);
+void common_hal_audiopwmio_audioout_stop(audiopwmio_audioout_obj_t* self);
+bool common_hal_audiopwmio_audioout_get_playing(audiopwmio_audioout_obj_t* self);
+void common_hal_audiopwmio_audioout_pause(audiopwmio_audioout_obj_t* self);
+void common_hal_audiopwmio_audioout_resume(audiopwmio_audioout_obj_t* self);
+bool common_hal_audiopwmio_audioout_get_paused(audiopwmio_audioout_obj_t* self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO_AUDIOOUT_H
diff --git a/shared-bindings/audiopwmio/__init__.c b/shared-bindings/audiopwmio/__init__.c
new file mode 100644
index 000000000..6253d1e8e
--- /dev/null
+++ b/shared-bindings/audiopwmio/__init__.c
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the MicroPython 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 <stdint.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/audiopwmio/__init__.h"
+#include "shared-bindings/audiopwmio/AudioOut.h"
+
+//| :mod:`audiopwmio` --- Support for audio input and output
+//| ========================================================
+//|
+//| .. module:: audiopwmio
+//| :synopsis: Support for audio output via digital PWM
+//| :platform: NRF52
+//|
+//| The `audiopwmio` module contains classes to provide access to audio IO.
+//|
+//| Libraries
+//|
+//| .. toctree::
+//| :maxdepth: 3
+//|
+//| AudioOut
+//|
+//| All classes change hardware state and should be deinitialized when they
+//| are no longer needed if the program continues after use. To do so, either
+//| call :py:meth:`!deinit` or use a context manager. See
+//| :ref:`lifetime-and-contextmanagers` for more info.
+//|
+//| Since CircuitPython 5, `Mixer`, `RawSample` and `WaveFile` are moved
+//| to :mod:`audiocore`.
+//|
+
+STATIC const mp_rom_map_elem_t audiopwmio_module_globals_table[] = {
+ { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_audiopwmio) },
+ { MP_ROM_QSTR(MP_QSTR_AudioOut), MP_ROM_PTR(&audiopwmio_audioout_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(audiopwmio_module_globals, audiopwmio_module_globals_table);
+
+const mp_obj_module_t audiopwmio_module = {
+ .base = { &mp_type_module },
+ .globals = (mp_obj_dict_t*)&audiopwmio_module_globals,
+};
diff --git a/shared-bindings/audiopwmio/__init__.h b/shared-bindings/audiopwmio/__init__.h
new file mode 100644
index 000000000..e4b7067d1
--- /dev/null
+++ b/shared-bindings/audiopwmio/__init__.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython 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.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
+
+#include "py/obj.h"
+
+// Nothing now.
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
diff --git a/shared-module/audiopwmio/__init__.c b/shared-module/audiopwmio/__init__.c
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/shared-module/audiopwmio/__init__.c
diff --git a/shared-module/audiopwmio/__init__.h b/shared-module/audiopwmio/__init__.h
new file mode 100644
index 000000000..964e4aafe
--- /dev/null
+++ b/shared-module/audiopwmio/__init__.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Dan Halbert 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.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_AUDIOPWMIO__INIT__H
+#define MICROPY_INCLUDED_SHARED_MODULE_AUDIOPWMIO__INIT__H
+
+#include "shared-module/audiocore/__init__.h"
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_AUDIOPWMIO__INIT__H