1 files changed, 87 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/digitalio/Pull.c b/circuitpython/shared-bindings/digitalio/Pull.c
new file mode 100644
index 0000000..4db68dd
--- /dev/null
+++ b/circuitpython/shared-bindings/digitalio/Pull.c
@@ -0,0 +1,87 @@
+/*
+ * 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 "py/runtime.h"
+#include "shared-bindings/digitalio/Pull.h"
+
+//| class Pull:
+//|     """Defines the pull of a digital input pin"""
+//|
+//|     def __init__(self) -> None:
+//|         """Enum-like class to define the pull value, if any, used while reading
+//|         digital values in."""
+//|         ...
+//|
+//|     UP: Pull
+//|     """When the input line isn't being driven the pull up can pull the state
+//|     of the line high so it reads as true."""
+//|
+//|     DOWN: Pull
+//|     """When the input line isn't being driven the pull down can pull the
+//|     state of the line low so it reads as false."""
+//|
+const mp_obj_type_t digitalio_pull_type;
+
+const digitalio_pull_obj_t digitalio_pull_up_obj = {
+    { &digitalio_pull_type },
+};
+
+const digitalio_pull_obj_t digitalio_pull_down_obj = {
+    { &digitalio_pull_type },
+};
+
+STATIC const mp_rom_map_elem_t digitalio_pull_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_UP),    MP_ROM_PTR(&digitalio_pull_up_obj) },
+    { MP_ROM_QSTR(MP_QSTR_DOWN),  MP_ROM_PTR(&digitalio_pull_down_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(digitalio_pull_locals_dict, digitalio_pull_locals_dict_table);
+
+STATIC void digitalio_pull_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    qstr pull = MP_QSTR_UP;
+    if (self_in == MP_ROM_PTR(&digitalio_pull_down_obj)) {
+        pull = MP_QSTR_DOWN;
+    }
+    mp_printf(print, "%q.%q.%q", MP_QSTR_digitalio, MP_QSTR_Pull, pull);
+}
+
+const mp_obj_type_t digitalio_pull_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_Pull,
+    .print = digitalio_pull_print,
+    .locals_dict = (mp_obj_dict_t *)&digitalio_pull_locals_dict,
+};
+
+digitalio_pull_t validate_pull(mp_rom_obj_t obj, qstr arg_name) {
+    if (obj == MP_ROM_PTR(&digitalio_pull_up_obj)) {
+        return PULL_UP;
+    } else if (obj == MP_ROM_PTR(&digitalio_pull_down_obj)) {
+        return PULL_DOWN;
+    }
+    if (obj == MP_ROM_NONE) {
+        return PULL_NONE;
+    }
+    mp_raise_TypeError_varg(translate("%q must be of type %q or None"), arg_name, MP_QSTR_Pull);
+}