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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 "shared-bindings/keypad/Event.h"
#include "shared-bindings/keypad/EventQueue.h"
#include "shared-bindings/supervisor/__init__.h"
#include "shared-module/keypad/EventQueue.h"
// Key number is lower 15 bits of a 16-bit value.
#define EVENT_PRESSED (1 << 15)
#define EVENT_KEY_NUM_MASK ((1 << 15) - 1)
void common_hal_keypad_eventqueue_construct(keypad_eventqueue_obj_t *self, size_t max_events) {
// Event queue is 16-bit values.
ringbuf_alloc(&self->encoded_events, max_events * (sizeof(uint16_t) + sizeof(mp_obj_t)), false);
self->overflowed = false;
}
bool common_hal_keypad_eventqueue_get_into(keypad_eventqueue_obj_t *self, keypad_event_obj_t *event) {
int encoded_event = ringbuf_get16(&self->encoded_events);
if (encoded_event == -1) {
return false;
}
mp_obj_t ticks;
ringbuf_get_n(&self->encoded_events, (uint8_t *)&ticks, sizeof(ticks));
// "Construct" using the existing event.
common_hal_keypad_event_construct(event, encoded_event & EVENT_KEY_NUM_MASK, encoded_event & EVENT_PRESSED, ticks);
return true;
}
mp_obj_t common_hal_keypad_eventqueue_get(keypad_eventqueue_obj_t *self) {
keypad_event_obj_t *event = m_new_obj(keypad_event_obj_t);
event->base.type = &keypad_event_type;
bool result = common_hal_keypad_eventqueue_get_into(self, event);
if (result) {
return event;
}
m_free(event);
return MP_ROM_NONE;
}
bool common_hal_keypad_eventqueue_get_overflowed(keypad_eventqueue_obj_t *self) {
return self->overflowed;
}
void common_hal_keypad_eventqueue_set_overflowed(keypad_eventqueue_obj_t *self, bool overflowed) {
self->overflowed = overflowed;
}
void common_hal_keypad_eventqueue_clear(keypad_eventqueue_obj_t *self) {
ringbuf_clear(&self->encoded_events);
common_hal_keypad_eventqueue_set_overflowed(self, false);
}
size_t common_hal_keypad_eventqueue_get_length(keypad_eventqueue_obj_t *self) {
return ringbuf_num_filled(&self->encoded_events);
}
bool keypad_eventqueue_record(keypad_eventqueue_obj_t *self, mp_uint_t key_number, bool pressed, mp_obj_t timestamp) {
if (ringbuf_num_empty(&self->encoded_events) == 0) {
// Queue is full. Set the overflow flag. The caller will decide what else to do.
common_hal_keypad_eventqueue_set_overflowed(self, true);
return false;
}
uint16_t encoded_event = key_number & EVENT_KEY_NUM_MASK;
if (pressed) {
encoded_event |= EVENT_PRESSED;
}
ringbuf_put16(&self->encoded_events, encoded_event);
ringbuf_put_n(&self->encoded_events, (uint8_t *)×tamp, sizeof(mp_obj_t));
return true;
}
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