bluetooth: controller: Vendor specific ticker resolution margin (89ab68f2) · Commits · Wenxi XU / zephyr

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -703,7 +703,7 @@ static inline u32_t isr_rx_pdu(struct lll_scan *lll, u8_t devmatch_ok,
		evt = HDR_LLL2EVT(lll);
		if (pdu_end_us > (HAL_TICKER_TICKS_TO_US(evt->ticks_slot) -
		502 - EVENT_OVERHEAD_START_US -
		(EVENT_JITTER_US << 1))) {
		EVENT_TICKER_RES_MARGIN_US)) {
		return -ETIME;
		}

+6 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,12 @@
		*/
		#define EVENT_OVERHEAD_END_US 40
		#define EVENT_JITTER_US 16
		/* Ticker resolution margin
		* Needed due to the lack of fine timing resolution in ticker_start
		* and ticker_update. Set to 32 us, which is ~1 tick with 32768 Hz
		* clock.
		*/
		#define EVENT_TICKER_RES_MARGIN_US 32

		#define EVENT_RX_JITTER_US(phy) 16 /* Radio Rx timing uncertainty */
		#define EVENT_RX_TO_US(phy) ((((((phy)&0x03) + 4)<<3)/BIT((((phy)&0x3)>>1))) + \

+3 −3

Original line number	Diff line number	Diff line
		@@ -232,7 +232,7 @@ void ull_slave_setup(memq_link_t link, struct node_rx_hdr rx,
		conn_offset_us = ftr->us_radio_end;
		conn_offset_us += ((u64_t)win_offset + 1) * 1250U;
		conn_offset_us -= EVENT_OVERHEAD_START_US;
		conn_offset_us -= EVENT_JITTER_US << 1;
		conn_offset_us -= EVENT_TICKER_RES_MARGIN_US;
		conn_offset_us -= EVENT_JITTER_US;
		conn_offset_us -= ftr->us_radio_rdy;

		@@ -317,7 +317,7 @@ void ull_slave_done(struct node_rx_event_done done, u32_t ticks_drift_plus,
		done->extra.slave.preamble_to_addr_us;

		start_to_address_expected_us = EVENT_JITTER_US +
		(EVENT_JITTER_US << 1) +
		EVENT_TICKER_RES_MARGIN_US +
		window_widening_event_us +
		preamble_to_addr_us;

		@@ -332,7 +332,7 @@ void ull_slave_done(struct node_rx_event_done done, u32_t ticks_drift_plus,
		HAL_TICKER_US_TO_TICKS(start_to_address_actual_us);
		*ticks_drift_minus =
		HAL_TICKER_US_TO_TICKS(EVENT_JITTER_US +
		(EVENT_JITTER_US << 1) +
		EVENT_TICKER_RES_MARGIN_US +
		preamble_to_addr_us);
		}
		}