112 lines
4.2 KiB
C
112 lines
4.2 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "py/gc.h"
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#include "py/runtime.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "shared-bindings/keypad/EventQueue.h"
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#include "shared-bindings/keypad/Keys.h"
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#include "shared-bindings/keypad/__init__.h"
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#include "shared-bindings/supervisor/__init__.h"
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#include "supervisor/port.h"
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#include "supervisor/shared/tick.h"
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static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp);
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static size_t keys_get_key_count(void *self_in);
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static keypad_scanner_funcs_t keys_funcs = {
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.scan_now = keypad_keys_scan_now,
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.get_key_count = keys_get_key_count,
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};
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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) {
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mp_obj_t dios[num_pins];
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for (size_t i = 0; i < num_pins; i++) {
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digitalio_digitalinout_obj_t *dio = m_new_obj(digitalio_digitalinout_obj_t);
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dio->base.type = &digitalio_digitalinout_type;
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common_hal_digitalio_digitalinout_construct(dio, pins[i]);
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if (pull) {
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common_hal_digitalio_digitalinout_set_pull(dio, value_when_pressed ? PULL_DOWN : PULL_UP);
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}
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dios[i] = dio;
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}
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self->digitalinouts = mp_obj_new_tuple(num_pins, dios);
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self->currently_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false);
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self->previously_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false);
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self->value_when_pressed = value_when_pressed;
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self->funcs = &keys_funcs;
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keypad_construct_common((keypad_scanner_obj_t *)self, interval, max_events);
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}
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void common_hal_keypad_keys_deinit(keypad_keys_obj_t *self) {
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if (common_hal_keypad_deinited(self)) {
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return;
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}
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// Remove self from the list of active keypad scanners first.
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keypad_deregister_scanner((keypad_scanner_obj_t *)self);
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for (size_t key = 0; key < keys_get_key_count(self); key++) {
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common_hal_digitalio_digitalinout_deinit(self->digitalinouts->items[key]);
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}
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self->digitalinouts = MP_ROM_NONE;
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common_hal_keypad_deinit_core(self);
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}
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size_t keys_get_key_count(void *self_in) {
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keypad_keys_obj_t *self = self_in;
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return self->digitalinouts->len;
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}
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static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp) {
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keypad_keys_obj_t *self = self_in;
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size_t key_count = keys_get_key_count(self);
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for (mp_uint_t key_number = 0; key_number < key_count; key_number++) {
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// Remember the previous up/down state.
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const bool previous = self->currently_pressed[key_number];
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self->previously_pressed[key_number] = previous;
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// Get the current state.
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const bool current =
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common_hal_digitalio_digitalinout_get_value(self->digitalinouts->items[key_number]) ==
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self->value_when_pressed;
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self->currently_pressed[key_number] = current;
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// Record any transitions.
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if (previous != current) {
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keypad_eventqueue_record(self->events, key_number, current, timestamp);
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}
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}
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}
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