Bluetooth: controller: Increase advertising random delay resolution (d5836195) · Commits · Wenxi XU / zephyr

Increase the resolution of advertising random delay from 1 ms unit to 1 us units. The controller scheduling will floor it to nearest 32KHz clock unit on nRF5 series. Signed-off-by:

Vinayak Kariappa Chettimada <vich@nordicsemi.no>

subsys/bluetooth/controller/ll_sw/ctrl.c

+4 −5

Original line number	Diff line number	Diff line
		@@ -3905,12 +3905,12 @@ static inline u32_t isr_close_adv(void)
		if ((_radio.state == STATE_CLOSE) &&
		(!_radio.advertiser.is_hdcd)) {
		u32_t ticker_status;
		u8_t random_delay;
		u16_t random_delay;

		entropy_nrf_get_entropy_isr(_radio.entropy,
		&random_delay,
		(void *)&random_delay,
		sizeof(random_delay));
		random_delay %= 10;
		random_delay %= 10000;
		random_delay += 1;

		/* Call to ticker_update can fail under the race
		@@ -3923,8 +3923,7 @@ static inline u32_t isr_close_adv(void)
		ticker_update(RADIO_TICKER_INSTANCE_ID_RADIO,
		RADIO_TICKER_USER_ID_WORKER,
		RADIO_TICKER_ID_ADV,
		HAL_TICKER_US_TO_TICKS(random_delay *
		1000),
		HAL_TICKER_US_TO_TICKS(random_delay),
		0, 0, 0, 0, 0, ticker_update_adv_assert,
		(void *)__LINE__);
		LL_ASSERT((ticker_status == TICKER_STATUS_SUCCESS) \|\|

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