84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2021 Dan Halbert for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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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, uint8_t debounce_threshold) {
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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 =
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mp_obj_malloc(digitalio_digitalinout_obj_t, &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->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, debounce_threshold);
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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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// 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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// Record any transitions.
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if (keypad_debounce((keypad_scanner_obj_t *)self, key_number, 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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