michaelh/zephyr
1
0
Fork 0
Code Releases Activity

Bluetooth: controller: Add range delay calculations

Browse source 
Add implementation in controller to use range delay
alongwith the active clock accuracy jitter.

Range has been hard coded to 1000 meters, suffices
modules out in the market.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2019-02-13 10:01:05 +05:30 • committed by Carles Cufí
commit f4281c38f8
3 changed files with 18 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

11
subsys/bluetooth/controller/ll_sw/ctrl.c
View file

@ -74,6 +74,13 @@
#define RADIO_TIFS 150 /* BT Spec. defined */
/* Inter Event Space */
#define RADIO_TIES_US 625 /* Implementation defined */
/* Range Delay
* Refer to BT Spec v5.1 Vol.6, Part B, Section 4.2.3 Range Delay
* "4 / 1000" is an approximation of the propagation time in us of the
* signal to travel 1 meter.
*/
#define RADIO_RANGE_DISTANCE 1000 /* meters */
#define RADIO_RANGE_DELAY_US (2 * RADIO_RANGE_DISTANCE * 4 / 1000)
/* Implementation defines */
#define RADIO_TICKER_JITTER_US 16
@ -671,8 +678,8 @@ static inline void isr_radio_state_tx(void)
_radio.state = STATE_RX;
hcto = radio_tmr_tifs_base_get()
+ RADIO_TIFS + 4 + 1; /* 1us, end jitter */
hcto = radio_tmr_tifs_base_get() + RADIO_TIFS + 4 +
RADIO_RANGE_DELAY_US + 1; /* 1us, end jitter */
radio_tmr_tifs_set(RADIO_TIFS);