146 lines
5.7 KiB
C
146 lines
5.7 KiB
C
/**
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* Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "es_adv_timing_resolver.h"
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#include "sdk_macros.h"
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/**@brief Function for finding delay to use after each non-eTLM advertisement.
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*
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* @param[in] adv_interval Configured advertisement interval.
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* @param[in] num_slots_configured Number of configured slots.
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* @param[in] eTLM_required Is there an eTLM slot.
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*/
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static uint16_t get_adv_delay(uint16_t adv_interval,
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uint8_t num_slots_configured,
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bool eTLM_required)
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{
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// If eTLM is required, don't count this when calculating delay.
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return adv_interval / (num_slots_configured - (eTLM_required ? 1 : 0));
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}
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/**@brief Function for checking if given slot_no is an EID slot.
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*
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* @param[in] slot_no Slot number to check.
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* @param[in] p_eid_slots_configured Pointer to list of configured EID slots.
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* @param[in] num_eid_slots_configured Number of EID slots configured.
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*/
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static bool is_eid(uint8_t slot_no, const uint8_t * p_eid_slots_configured, uint8_t num_eid_slots_configured)
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{
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for (uint32_t i = 0; i < num_eid_slots_configured; ++i)
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{
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if (slot_no == p_eid_slots_configured[i])
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{
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return true;
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}
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}
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return false;
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}
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ret_code_t es_adv_timing_resolve(es_adv_timing_resolver_input_t * p_input)
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{
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VERIFY_PARAM_NOT_NULL(p_input);
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uint8_t result_index = 0;
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bool eTLM_required = p_input->tlm_configured && p_input->num_eid_slots_configured > 0;
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uint16_t base_delay;
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if (p_input->num_slots_configured == 0)
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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base_delay = get_adv_delay(p_input->adv_interval, p_input->num_slots_configured, eTLM_required);
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for (uint32_t i = 0; i < p_input->num_slots_configured; ++i)
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{
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uint8_t slot_no = p_input->p_slots_configured[i];
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if (!(eTLM_required && slot_no == p_input->tlm_slot))
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{
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es_adv_timing_resolver_adv_timing_t * p_current_result = &p_input->p_result->timing_results[result_index];
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p_current_result->slot_no = slot_no;
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p_current_result->is_etlm = false;
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// If an eTLM is to be advertised for this frame, this value will be changed.
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p_current_result->delay_ms = base_delay;
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result_index++;
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if (eTLM_required &&
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is_eid(slot_no, p_input->p_eid_slots_configured, p_input->num_eid_slots_configured))
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{
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es_adv_timing_resolver_adv_timing_t * p_eTLM_timing_result =
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&p_input->p_result->timing_results[result_index];
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p_current_result->delay_ms = APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS; // Update delay from EID to eTLM frame.
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p_eTLM_timing_result->slot_no = slot_no; // Point to EID slot-no, as this will be
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// used for finding the correct EIK.
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p_eTLM_timing_result->is_etlm = true; // Configure as eTLM frame.
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if (base_delay > APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS)
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{
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p_eTLM_timing_result->delay_ms =
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base_delay -
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APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS; // Set delay of eTLM frame.
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}
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else
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{
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p_eTLM_timing_result->delay_ms = APP_CONFIG_ADV_FRAME_SPACING_MS_MIN;
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}
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result_index++;
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}
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}
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}
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p_input->p_result->len_timing_results = result_index; // Note: index has been increased to equal length of result.
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if (p_input->p_result->len_timing_results > 0)
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{
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p_input->p_result->timing_results[p_input->p_result->len_timing_results - 1].delay_ms = 0; // Last Slot does not need delay.
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}
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return NRF_SUCCESS;
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}
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