es_adv_timing_resolver.c 5.7 KB

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  1. /**
  2. * Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without modification,
  7. * are permitted provided that the following conditions are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright notice, this
  10. * list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form, except as embedded into a Nordic
  13. * Semiconductor ASA integrated circuit in a product or a software update for
  14. * such product, must reproduce the above copyright notice, this list of
  15. * conditions and the following disclaimer in the documentation and/or other
  16. * materials provided with the distribution.
  17. *
  18. * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
  19. * contributors may be used to endorse or promote products derived from this
  20. * software without specific prior written permission.
  21. *
  22. * 4. This software, with or without modification, must only be used with a
  23. * Nordic Semiconductor ASA integrated circuit.
  24. *
  25. * 5. Any software provided in binary form under this license must not be reverse
  26. * engineered, decompiled, modified and/or disassembled.
  27. *
  28. * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
  29. * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30. * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
  31. * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
  32. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34. * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. *
  39. */
  40. #include "es_adv_timing_resolver.h"
  41. #include "sdk_macros.h"
  42. /**@brief Function for finding delay to use after each non-eTLM advertisement.
  43. *
  44. * @param[in] adv_interval Configured advertisement interval.
  45. * @param[in] num_slots_configured Number of configured slots.
  46. * @param[in] eTLM_required Is there an eTLM slot.
  47. */
  48. static uint16_t get_adv_delay(uint16_t adv_interval,
  49. uint8_t num_slots_configured,
  50. bool eTLM_required)
  51. {
  52. // If eTLM is required, don't count this when calculating delay.
  53. return adv_interval / (num_slots_configured - (eTLM_required ? 1 : 0));
  54. }
  55. /**@brief Function for checking if given slot_no is an EID slot.
  56. *
  57. * @param[in] slot_no Slot number to check.
  58. * @param[in] p_eid_slots_configured Pointer to list of configured EID slots.
  59. * @param[in] num_eid_slots_configured Number of EID slots configured.
  60. */
  61. static bool is_eid(uint8_t slot_no, const uint8_t * p_eid_slots_configured, uint8_t num_eid_slots_configured)
  62. {
  63. for (uint32_t i = 0; i < num_eid_slots_configured; ++i)
  64. {
  65. if (slot_no == p_eid_slots_configured[i])
  66. {
  67. return true;
  68. }
  69. }
  70. return false;
  71. }
  72. ret_code_t es_adv_timing_resolve(es_adv_timing_resolver_input_t * p_input)
  73. {
  74. VERIFY_PARAM_NOT_NULL(p_input);
  75. uint8_t result_index = 0;
  76. bool eTLM_required = p_input->tlm_configured && p_input->num_eid_slots_configured > 0;
  77. uint16_t base_delay;
  78. if (p_input->num_slots_configured == 0)
  79. {
  80. return NRF_ERROR_INVALID_PARAM;
  81. }
  82. base_delay = get_adv_delay(p_input->adv_interval, p_input->num_slots_configured, eTLM_required);
  83. for (uint32_t i = 0; i < p_input->num_slots_configured; ++i)
  84. {
  85. uint8_t slot_no = p_input->p_slots_configured[i];
  86. if (!(eTLM_required && slot_no == p_input->tlm_slot))
  87. {
  88. es_adv_timing_resolver_adv_timing_t * p_current_result = &p_input->p_result->timing_results[result_index];
  89. p_current_result->slot_no = slot_no;
  90. p_current_result->is_etlm = false;
  91. // If an eTLM is to be advertised for this frame, this value will be changed.
  92. p_current_result->delay_ms = base_delay;
  93. result_index++;
  94. if (eTLM_required &&
  95. is_eid(slot_no, p_input->p_eid_slots_configured, p_input->num_eid_slots_configured))
  96. {
  97. es_adv_timing_resolver_adv_timing_t * p_eTLM_timing_result =
  98. &p_input->p_result->timing_results[result_index];
  99. p_current_result->delay_ms = APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS; // Update delay from EID to eTLM frame.
  100. p_eTLM_timing_result->slot_no = slot_no; // Point to EID slot-no, as this will be
  101. // used for finding the correct EIK.
  102. p_eTLM_timing_result->is_etlm = true; // Configure as eTLM frame.
  103. if (base_delay > APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS)
  104. {
  105. p_eTLM_timing_result->delay_ms =
  106. base_delay -
  107. APP_CONFIG_ADV_FRAME_ETLM_SPACING_MS; // Set delay of eTLM frame.
  108. }
  109. else
  110. {
  111. p_eTLM_timing_result->delay_ms = APP_CONFIG_ADV_FRAME_SPACING_MS_MIN;
  112. }
  113. result_index++;
  114. }
  115. }
  116. }
  117. p_input->p_result->len_timing_results = result_index; // Note: index has been increased to equal length of result.
  118. if (p_input->p_result->len_timing_results > 0)
  119. {
  120. p_input->p_result->timing_results[p_input->p_result->len_timing_results - 1].delay_ms = 0; // Last Slot does not need delay.
  121. }
  122. return NRF_SUCCESS;
  123. }