Bluetooth: Controller: radio: add PHYEND delay compensation for nRF52
Radio peripheral that includes Direction Finding Extension is
able to generate EVENTS_PHYEND at very end of received packet.
In case there is a Constant Tone Extensions in received packet
the EVENTS_PHYEND event is generated after end of CTE reception.
If the CTE is not present in received PDU, the EVENTS_PHYEND
event is generate in the same instant as EVENTS_END.
If CTEINLINE is enabled then Radio will do a runtime packet parsing
to check if CTEInfo is present in received packet. In case there
is no CTEInfo the EVENTS_PHYEND event will be generated with
16 us delay after EVENTS_END.
To maintain IFS, additional EVENT_COMPARE is used that
will timeout earlier than regular EVENT_COMPARE for EVENTS_PHYEND
generated withtout delay. That additional EVENT_COMPARE will start
software switching of radio mode to TX. In case there is a CTEInfo
present in the packet, additional PPI wiring will cancell
EVENTS_COMPARE set for delayed EVENTS_PHYEND.
The commit add support for delayed PHYEND event for nRF52 SOCs.
Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>
13 files changed
