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diff --git a/shared-bindings/countio/__init__.c b/shared-bindings/countio/__init__.c
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+++ b/shared-bindings/countio/__init__.c
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+
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/countio/__init__.h"
+#include "shared-bindings/countio/Counter.h"
+
+//| :mod:`countio` --- Support for edge counting
+//| ========================================================
+//|
+//| .. module:: countio
+//|   :synopsis: Support for edge counting
+//|   :platform: SAMD
+//|
+//| The `countio` module contains logic to read and count edge transistions
+//|
+//| Libraries
+//|
+//| .. toctree::
+//|     :maxdepth: 3
+//|
+//|     Counter
+//|
+
+//| .. warning:: This module is not available in some SAMD21 (aka M0) builds. See the
+//|   :ref:`module-support-matrix` for more info.
+//|
+
+//| 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.
+//|
+
+STATIC const mp_rom_map_elem_t countio_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_countio) },
+    { MP_ROM_QSTR(MP_QSTR_Counter), MP_ROM_PTR(&countio_counter_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(countio_module_globals, countio_module_globals_table);
+
+const mp_obj_module_t countio_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&countio_module_globals,
+};