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Download Reference Guide v1.2 - open-ZB
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TR-061106 An IEEE 802.15.4 protocol implementation (in nesC/TinyOS): Reference Guide v1.2 Figure 20 - Timer events in superframe structure. Provided Interfaces The provided interfaces of the TimerAsyncM component are the following: • TimerAsync Variables • • • • • • • • • • • • • • • • • • • • uint32_t ticks_counter – current number of clock ticks on each beacon interval. uint32_t bi_ticks – number of clock ticks needed to reach the beacon interval boundary. uint32_t bi_backoff_periods – number of backoffs in one beacon interval. uint32_t before_bi_ticks – number of clock ticks needed to reach the boundary defined by the bi_ticks – BEFORE_BI_INTERVAL (constant). uint32_t sd_ticks – number of clock ticks needed to reach the superframe duration interval boundary. uint32_t time_slot_backoff_periods – number of backoffs in one time slot. uint32_t time_slot_ticks –total number of clock ticks needed to reach the beacon interval boundary. uint32_t before_time_slot_ticks - number of clock ticks needed to reach the boundary defined by the bi_ticks – BEFORE_BB_INTERVAL (constant). uint32_t time_slot_tick_next_fire – number of clock ticks needed to reach the next time slot boundary. uint32_t backoff_symbols – number of symbols in one backoff. uint32_t backoff_ticks – number of clock ticks in one backoff. uint32_t backoff_ticks_counter – current number of clock ticks on each backoff. uint8_t current_time_slot – current time slot number. uint32_t current_number_backoff_on_time_slot – current backoff number on each time slot. uint32_t current_number_backoff – current number of backoff on each beacon interval. bool backoffs – enable/disable backoff events . uint8_t previous_sfd – temporary variable that stores the SFD pin reading . uint8_t current_sfd – temporary variable that stores the SFD pin reading. uint32_t process_frame_tick_counter – current number of clock ticks needed to fully receive a data frame. uint32_t total_tick_counter – current number of clock ticks. Function description © IPP Hurray! Research Group www.hurray.isep.ipp.pt 49
