140 lines
5.2 KiB
C
140 lines
5.2 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 "py/gc.h"
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#include "py/objproperty.h"
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#include "shared-bindings/keypad/Keys.h"
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#include "shared-bindings/keypad/State.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "py/runtime.h"
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#include "supervisor/port.h"
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#define DEBOUNCE_TICKS (20)
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void common_hal_keypad_keys_construct(keypad_keys_obj_t *self, mp_uint_t num_pins, mcu_pin_obj_t *pins[], bool value_when_pressed, bool pull) {
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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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}
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void common_hal_keypad_keys_keys_with_state(keypad_keys_obj_t *self, int state, mp_obj_list_t *list_into) {
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const size_t list_length = list_into->len;
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size_t next_list_slot = 0;
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for (mp_uint_t key_num = 0; key_num < common_hal_keypad_keys_length(self); key_num++) {
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if (next_list_slot >= list_length) {
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// List is full.
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break;
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}
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bool store_key = false;
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switch (state) {
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case STATE_JUST_PRESSED:
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store_key = !self->previously_pressed[key_num] && self->currently_pressed[key_num];
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break;
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case STATE_STILL_PRESSED:
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store_key = self->previously_pressed[key_num] && self->currently_pressed[key_num];
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break;
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case STATE_PRESSED:
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store_key = self->currently_pressed[key_num];
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break;
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case STATE_JUST_RELEASED:
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store_key = self->previously_pressed[key_num] && !self->currently_pressed[key_num];
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break;
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case STATE_STILL_RELEASED:
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store_key = !self->previously_pressed[key_num] && !self->currently_pressed[key_num];
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break;
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case STATE_RELEASED:
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store_key = !self->currently_pressed[key_num];
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break;
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}
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if (store_key) {
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mp_obj_list_store(list_into, MP_OBJ_NEW_SMALL_INT(next_list_slot),
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MP_OBJ_NEW_SMALL_INT(key_num));
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next_list_slot++;
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}
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for (size_t unused_slot = next_list_slot; unused_slot < list_length; unused_slot++) {
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mp_obj_list_store(list_into, MP_OBJ_NEW_SMALL_INT(unused_slot),
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MP_ROM_NONE);
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}
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}
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}
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size_t common_hal_keypad_keys_length(keypad_keys_obj_t *self) {
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return self->digitalinouts->len;
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}
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bool common_hal_keypad_keys_scan(keypad_keys_obj_t *self) {
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uint64_t now = port_get_raw_ticks(NULL);
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if (now - self->last_scan_ticks < DEBOUNCE_TICKS) {
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// Too soon.
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return false;
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}
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self->last_scan_ticks = now;
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for (mp_uint_t key_num = 0; key_num < common_hal_keypad_keys_length(self); key_num++) {
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self->previously_pressed[key_num] = self->currently_pressed[key_num];
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self->currently_pressed[key_num] =
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common_hal_digitalio_digitalinout_get_value(self->digitalinouts->items[key_num]) ==
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self->value_when_pressed;
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}
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return true;
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}
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mp_int_t common_hal_keypad_keys_state(keypad_keys_obj_t *self, mp_uint_t key_num) {
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if (self->currently_pressed[key_num]) {
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if (self->previously_pressed[key_num]) {
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return STATE_STILL_PRESSED;
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} else {
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return STATE_JUST_PRESSED;
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}
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} else {
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if (self->previously_pressed[key_num]) {
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return STATE_JUST_RELEASED;
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} else {
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return STATE_STILL_RELEASED;
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}
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}
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}
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