67 lines
2.7 KiB
C
67 lines
2.7 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 "shared-bindings/keypad/Event.h"
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#include "shared-module/keypad/EventQueue.h"
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// Top bit of 16-bit event indicates pressed or released. Rest is key_num.
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#define EVENT_PRESSED (1 << 15)
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#define EVENT_RELEASED (0)
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#define EVENT_KEY_NUM_MASK (~EVENT_PRESSED)
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void common_hal_keypad_eventqueue_construct(keypad_eventqueue_obj_t *self, size_t max_events) {
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// Event queue is 16-bit values.
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ringbuf_alloc(&self->encoded_events, max_events * 2, false);
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}
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mp_obj_t common_hal_keypad_eventqueue_next(keypad_eventqueue_obj_t *self) {
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int encoded_event = ringbuf_get16(&self->encoded_events);
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if (encoded_event == -1) {
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return MP_ROM_NONE;
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}
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keypad_event_obj_t *event = m_new_obj(keypad_event_obj_t);
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event->base.type = &keypad_event_type;
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common_hal_keypad_event_construct(event, encoded_event & EVENT_KEY_NUM_MASK, encoded_event & EVENT_PRESSED);
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return MP_OBJ_FROM_PTR(event);
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}
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void common_hal_keypad_eventqueue_clear(keypad_eventqueue_obj_t *self) {
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ringbuf_clear(&self->encoded_events);
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}
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size_t common_hal_keypad_eventqueue_get_length(keypad_eventqueue_obj_t *self) {
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return ringbuf_num_filled(&self->encoded_events);
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}
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void keypad_eventqueue_record(keypad_eventqueue_obj_t *self, mp_uint_t key_num, bool pressed) {
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if (ringbuf_num_empty(&self->encoded_events) == 0) {
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// Discard oldest if full.
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ringbuf_get16(&self->encoded_events);
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}
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ringbuf_put16(&self->encoded_events, key_num | (pressed ? EVENT_PRESSED : EVENT_RELEASED));
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}
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