047b756e64
According to Bluetooth 5.3 Vol 4, Part E section 7.7.65.21 the Controller should send an IQ report with Packet_Status set to 0xFF and Sample_Count to 0x0, to inform Host that it is not able to store IQ samples for all received Constant Tone Extensions and has failed to sample at least once. This commit adds handling of such situation for direction finding in connectionless mode in lower link layer. It includes: - lack of node_rx_iq_report to store IQ samples, - lack of free node_rx to report received advertising data (generates an advertising data report with indication "incomplete, no more to come" and cancels reception of chained PDUs, - cancellation of chained PDUs reception due to other scheduling reasons. In all of these situations CTE reception must be enabled and number of received CTEs is smaller than requested by Host. If there is not sufficient number of node_rx_iq_report nodes and report was generated, the CTE will not be samples in a given periodic advertising synchronization event. The CTE will be sampled again in next event if there are node_rx_iq_report available. End user applications may check periodic advertising sync event counter when use of the reports to be sure about sync event the received report is connected with. Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/*
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* Copyright (c) 2020 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* Periodic advertisements synchronization status. */
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enum sync_status {
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SYNC_STAT_ALLOWED,
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SYNC_STAT_READY,
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SYNC_STAT_CONT_SCAN,
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SYNC_STAT_TERM
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};
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struct lll_sync {
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struct lll_hdr hdr;
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uint8_t access_addr[4];
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uint8_t crc_init[3];
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uint8_t phy:3;
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/* Bitmask providing not allowed types of CTE. */
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uint8_t cte_type:5;
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/* The member is required for filtering by CTE type. If filtering policy is disabled then
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* synchronization is terminated for periodic advertisements with wrong CTE type.
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*/
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uint8_t filter_policy:1;
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uint8_t is_rx_enabled:1;
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uint8_t is_aux_sched:1;
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#if defined(CONFIG_BT_CTLR_SYNC_ISO)
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uint8_t sca:3;
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#endif /* CONFIG_BT_CTLR_SYNC_ISO */
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#if defined(CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN)
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/* Counter used by LLL abort of event when in unreserved time space to
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* provide near fair scheduling of overlapping multiple Periodic
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* Sync sets.
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*/
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uint8_t abort_count;
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#endif /* CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
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uint16_t skip_prepare;
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uint16_t skip_event;
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uint16_t event_counter;
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uint16_t data_chan_id;
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struct {
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uint8_t data_chan_map[PDU_CHANNEL_MAP_SIZE];
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uint8_t data_chan_count:6;
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} chm[DOUBLE_BUFFER_SIZE];
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uint8_t chm_first;
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uint8_t chm_last;
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uint16_t chm_instant;
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uint32_t window_widening_periodic_us;
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uint32_t window_widening_max_us;
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uint32_t window_widening_prepare_us;
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uint32_t window_widening_event_us;
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uint32_t window_size_event_us;
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/* used to store lll_aux when chain is being scanned */
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struct lll_scan_aux *volatile lll_aux;
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#if defined(CONFIG_BT_CTLR_DF_SCAN_CTE_RX)
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struct lll_df_sync df_cfg;
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/* Member stores one additional IQ report rx node for notification of insufficient
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* resources to sample all CTEs in currently pending synchronization event.
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* The member is temporary storage used between prepare of an event and IQ data report
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* generation.
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*/
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struct node_rx_iq_report *node_cte_incomplete;
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/* Member sotres information if there were insufficient IQ report rx nodes for all CTEs
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* in pending synchronization event.
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*/
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bool is_cte_incomplete;
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#endif /* CONFIG_BT_CTLR_DF_SCAN_CTE_RX */
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};
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int lll_sync_init(void);
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int lll_sync_reset(void);
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void lll_sync_create_prepare(void *param);
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void lll_sync_prepare(void *param);
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enum sync_status lll_sync_cte_is_allowed(uint8_t cte_type_mask, uint8_t filter_policy,
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uint8_t rx_cte_time, uint8_t rx_cte_type);
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extern uint16_t ull_sync_lll_handle_get(struct lll_sync *lll);
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extern struct lll_sync *ull_sync_lll_is_valid_get(struct lll_sync *lll);
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