1 /*
2 * Copyright (c) 2017, Nordic Semiconductor ASA
3 * All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice, this
11 * list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 /**
36 * @file
37 * This file implements buffer management for frames received by nRF 802.15.4 radio driver.
38 *
39 */
40
41 #include "nrf_802154_rx_buffer.h"
42
43 #include <stddef.h>
44
45 #include "nrf_802154_config.h"
46
47 #if NRF_802154_RX_BUFFERS < 1
48 #error Not enough rx buffers in the 802.15.4 radio driver.
49 #endif
50
51 rx_buffer_t nrf_802154_rx_buffers[NRF_802154_RX_BUFFERS]; ///< Receive buffers.
52
nrf_802154_rx_buffer_init(void)53 void nrf_802154_rx_buffer_init(void)
54 {
55 for (uint32_t i = 0; i < NRF_802154_RX_BUFFERS; i++)
56 {
57 nrf_802154_rx_buffers[i].free = true;
58 }
59 }
60
nrf_802154_rx_buffer_free_find(void)61 rx_buffer_t * nrf_802154_rx_buffer_free_find(void)
62 {
63 for (uint32_t i = 0; i < NRF_802154_RX_BUFFERS; i++)
64 {
65 if (nrf_802154_rx_buffers[i].free)
66 {
67 return &nrf_802154_rx_buffers[i];
68 }
69 }
70
71 return NULL;
72 }
73
