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+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 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.
+ */
+
+#include <string.h>
+
+#include "py/gc.h"
+#include "py/runtime.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "shared-bindings/keypad/EventQueue.h"
+#include "shared-bindings/keypad/Keys.h"
+#include "shared-bindings/keypad/__init__.h"
+#include "shared-bindings/supervisor/__init__.h"
+#include "supervisor/port.h"
+#include "supervisor/shared/tick.h"
+
+static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp);
+static size_t keys_get_key_count(void *self_in);
+
+static keypad_scanner_funcs_t keys_funcs = {
+ .scan_now = keypad_keys_scan_now,
+ .get_key_count = keys_get_key_count,
+};
+
+void common_hal_keypad_keys_construct(keypad_keys_obj_t *self, mp_uint_t num_pins, const mcu_pin_obj_t *pins[], bool value_when_pressed, bool pull, mp_float_t interval, size_t max_events) {
+ mp_obj_t dios[num_pins];
+
+ for (size_t i = 0; i < num_pins; i++) {
+ digitalio_digitalinout_obj_t *dio = m_new_obj(digitalio_digitalinout_obj_t);
+ dio->base.type = &digitalio_digitalinout_type;
+ common_hal_digitalio_digitalinout_construct(dio, pins[i]);
+ if (pull) {
+ common_hal_digitalio_digitalinout_set_pull(dio, value_when_pressed ? PULL_DOWN : PULL_UP);
+ }
+ dios[i] = dio;
+ }
+
+ self->digitalinouts = mp_obj_new_tuple(num_pins, dios);
+ self->currently_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false);
+ self->previously_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false);
+ self->value_when_pressed = value_when_pressed;
+ self->funcs = &keys_funcs;
+
+ keypad_construct_common((keypad_scanner_obj_t *)self, interval, max_events);
+
+}
+
+void common_hal_keypad_keys_deinit(keypad_keys_obj_t *self) {
+ if (common_hal_keypad_deinited(self)) {
+ return;
+ }
+
+ // Remove self from the list of active keypad scanners first.
+ keypad_deregister_scanner((keypad_scanner_obj_t *)self);
+
+ for (size_t key = 0; key < keys_get_key_count(self); key++) {
+ common_hal_digitalio_digitalinout_deinit(self->digitalinouts->items[key]);
+ }
+ self->digitalinouts = MP_ROM_NONE;
+
+ common_hal_keypad_deinit_core(self);
+}
+
+size_t keys_get_key_count(void *self_in) {
+ keypad_keys_obj_t *self = self_in;
+ return self->digitalinouts->len;
+}
+
+static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp) {
+ keypad_keys_obj_t *self = self_in;
+ size_t key_count = keys_get_key_count(self);
+
+ for (mp_uint_t key_number = 0; key_number < key_count; key_number++) {
+ // Remember the previous up/down state.
+ const bool previous = self->currently_pressed[key_number];
+ self->previously_pressed[key_number] = previous;
+
+ // Get the current state.
+ const bool current =
+ common_hal_digitalio_digitalinout_get_value(self->digitalinouts->items[key_number]) ==
+ self->value_when_pressed;
+ self->currently_pressed[key_number] = current;
+
+ // Record any transitions.
+ if (previous != current) {
+ keypad_eventqueue_record(self->events, key_number, current, timestamp);
+ }
+ }
+}