| /* Copyright (c) 2018, Nordic Semiconductor ASA |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * 3. Neither the name of Nordic Semiconductor ASA nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| /** |
| * @file |
| * This file implements an immediate acknowledgement (Imm-Ack) generator for 802.15.4 radio driver. |
| * |
| */ |
| |
| #include "nrf_802154_imm_ack_generator.h" |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include "nrf_802154_ack_data.h" |
| #include "nrf_802154_const.h" |
| |
| #define IMM_ACK_INITIALIZER {0x05, ACK_HEADER_WITH_PENDING, 0x00, 0x00, 0x00, 0x00} |
| |
| static uint8_t m_ack_data[IMM_ACK_LENGTH + PHR_SIZE]; |
| |
| void nrf_802154_imm_ack_generator_init(void) |
| { |
| const uint8_t ack_data[] = IMM_ACK_INITIALIZER; |
| |
| memcpy(m_ack_data, ack_data, sizeof(ack_data)); |
| } |
| |
| const uint8_t * nrf_802154_imm_ack_generator_create(const uint8_t * p_frame) |
| { |
| // Set valid sequence number in ACK frame. |
| m_ack_data[DSN_OFFSET] = p_frame[DSN_OFFSET]; |
| |
| // Set pending bit in ACK frame. |
| if (nrf_802154_ack_data_pending_bit_should_be_set(p_frame)) |
| { |
| m_ack_data[FRAME_PENDING_OFFSET] = ACK_HEADER_WITH_PENDING; |
| } |
| else |
| { |
| m_ack_data[FRAME_PENDING_OFFSET] = ACK_HEADER_WITHOUT_PENDING; |
| } |
| |
| return m_ack_data; |
| } |