106 lines
4.2 KiB
C
106 lines
4.2 KiB
C
/*
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* This file is part of the MicroPython 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) 2019 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 <stdio.h>
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#include "shared/runtime/interrupt_char.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "shared-bindings/_bleio/__init__.h"
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#include "shared-bindings/_bleio/Connection.h"
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#include "shared-bindings/_bleio/CharacteristicBuffer.h"
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#include "supervisor/shared/tick.h"
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#include "common-hal/_bleio/CharacteristicBuffer.h"
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// Push all the data onto the ring buffer. When the buffer is full, new bytes will be dropped.
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STATIC void write_to_ringbuf(bleio_characteristic_buffer_obj_t *self, uint8_t *data, uint16_t len) {
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ringbuf_put_n(&self->ringbuf, data, len);
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}
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void bleio_characteristic_buffer_update(bleio_characteristic_buffer_obj_t *self, mp_buffer_info_t *bufinfo) {
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write_to_ringbuf(self, bufinfo->buf, bufinfo->len);
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}
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// Assumes that timeout and buffer_size have been validated before call.
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void common_hal_bleio_characteristic_buffer_construct(bleio_characteristic_buffer_obj_t *self,
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bleio_characteristic_obj_t *characteristic,
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mp_float_t timeout,
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size_t buffer_size) {
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self->characteristic = characteristic;
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self->timeout_ms = timeout * 1000;
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// This is a macro.
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ringbuf_alloc(&self->ringbuf, buffer_size);
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bleio_characteristic_set_observer(characteristic, self);
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}
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uint32_t common_hal_bleio_characteristic_buffer_read(bleio_characteristic_buffer_obj_t *self, uint8_t *data, size_t len, int *errcode) {
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uint64_t start_ticks = supervisor_ticks_ms64();
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// Wait for all bytes received or timeout
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while ((ringbuf_num_filled(&self->ringbuf) < len) && (supervisor_ticks_ms64() - start_ticks < self->timeout_ms)) {
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RUN_BACKGROUND_TASKS;
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// Allow user to break out of a timeout with a KeyboardInterrupt.
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if (mp_hal_is_interrupted()) {
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return 0;
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}
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}
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uint32_t num_bytes_read = ringbuf_get_n(&self->ringbuf, data, len);
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return num_bytes_read;
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}
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uint32_t common_hal_bleio_characteristic_buffer_rx_characters_available(bleio_characteristic_buffer_obj_t *self) {
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uint16_t count = ringbuf_num_filled(&self->ringbuf);
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return count;
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}
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void common_hal_bleio_characteristic_buffer_clear_rx_buffer(bleio_characteristic_buffer_obj_t *self) {
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ringbuf_clear(&self->ringbuf);
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}
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bool common_hal_bleio_characteristic_buffer_deinited(bleio_characteristic_buffer_obj_t *self) {
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return self->characteristic == NULL;
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}
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void common_hal_bleio_characteristic_buffer_deinit(bleio_characteristic_buffer_obj_t *self) {
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if (!common_hal_bleio_characteristic_buffer_deinited(self)) {
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bleio_characteristic_clear_observer(self->characteristic);
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ringbuf_deinit(&self->ringbuf);
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}
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}
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bool common_hal_bleio_characteristic_buffer_connected(bleio_characteristic_buffer_obj_t *self) {
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return self->characteristic != NULL &&
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self->characteristic->service != NULL &&
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(!self->characteristic->service->is_remote ||
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(self->characteristic->service->connection != MP_OBJ_NULL &&
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common_hal_bleio_connection_get_connected(self->characteristic->service->connection)));
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}
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