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diff --git a/shared-bindings/pulseio/__init__.c b/shared-bindings/pulseio/__init__.c
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 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/pulseio/__init__.h"
+#include "shared-bindings/pulseio/PulseIn.h"
+#include "shared-bindings/pulseio/PulseOut.h"
+#include "shared-bindings/pulseio/PWMOut.h"
+
+//| :mod:`pulseio` --- Support for pulse based protocols
+//| =================================================
+//|
+//| .. module:: pulseio
+//|   :synopsis: Support for pulse based protocols
+//|   :platform: SAMD21, ESP8266
+//|
+//| The `pulseio` module contains classes to provide access to basic pulse IO.
+//|
+//| Libraries
+//|
+//| .. toctree::
+//|     :maxdepth: 3
+//|
+//|     PulseIn
+//|     PulseOut
+//|     PWMOut
+//|
+//| All libraries change hardware state and should be deinitialized when they
+//| are no longer needed. To do so, either call :py:meth:`!deinit` or use a
+//| context manager.
+//|
+//| For example::
+//|
+//|   import pulseio
+//|   import time
+//|   from board import *
+//|
+//|   with pulseio.PWMOut(D13) as pin:
+//|     pin.duty_cycle = 2 ** 15
+//|     time.sleep(0.1)
+//|
+//| This example will initialize the the device, set
+//| :py:data:`~pulseio.PWMOut.duty_cycle`, sleep 0.1 seconds and then
+//| :py:meth:`~pulseio.PWMOut.deinit` the hardware.
+//|
+
+STATIC const mp_rom_map_elem_t pulseio_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_pulseio) },
+    { MP_ROM_QSTR(MP_QSTR_PulseIn), MP_ROM_PTR(&pulseio_pulsein_type) },
+    { MP_ROM_QSTR(MP_QSTR_PulseOut), MP_ROM_PTR(&pulseio_pulseout_type) },
+    { MP_ROM_QSTR(MP_QSTR_PWMOut), MP_ROM_PTR(&pulseio_pwmout_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(pulseio_module_globals, pulseio_module_globals_table);
+
+const mp_obj_module_t pulseio_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&pulseio_module_globals,
+};