Differences in RADIO register for DirectionFinding between nRF52833 and nRF54L15

[loquat]

Hello

I am trying to implement AoA reception using the TimeSlotAPI on the nRF54L15.

I have previously implemented a simple AoA reception function on the nRF52833.

Please let me know if there are any differences between the DirectionFinding settings of the nRF52833 and the nRF54L15.

Implementation is very difficult as it requires knowledge of AdvertisingExtension and PeriodicAdvertising. The SoftDevice already has this function, and it seems possible to achieve it by simply adding CTE reception and antenna switching settings, so I wonder why they don't implement it.

[tesc]

Hi,

I am afraid the nRF54L lacks hardware support for implementing direction finding. This is also the reason why we don't have a software implementation for it.

Regards,
Terje

[loquat]

Really?

I think the following registers mentioned in the datasheet are for DirectionFinding.
Am I wrong?

DFEMODE
DFESTATUS
DFECTRL1
DFECTRL2
SWITCHPATTERN
CLEARPATTERN
PSEL.DFEGPIO[n]
DFEPACKET.PTR
DFEPACKET.MAXCNT
DFEPACKET.AMOUNT
DFEPACKET.CURRENTAMOUNT

[tesc]

Hi,

You are not wrong, no. However, I regret to inform you that the Direction Finding related registers, which have been present in the Preliminary Datasheet, are unfortunately not available. Further, they will not be listed in the final Datasheet. I am deeply sorry for any inconvenience.

For any further information on future plans and which devices support AoA, please contact our Regional Sales Director for your area. If you do not know who that is, then please ask in a private case or private message, and we will provide you with the contact details. Alternatively, you can reach them from our Contact us page, under "Sales related questions."

Regards,
Terje

[loquat]

OK.Thanks.

I am testing direction_finding_connectionless_tx
on the nRF54L15DK.
The receiving (direction_finding_connectionless_tx) side is the nRF52833DK.
This is working without any problems. In other words, AoA transmission is working on the nRF54L15DK. Will this also stop working in the future?

[tesc]

Hi,

For full details on which parts of AoA are functional, conformant and/or qualifiable on the nRF54L series now and in the future, please reach out to our sales representative. I am afraid I do not have full details to share here on DevZone, but our sales representatives in Japan will more than happily help you out with any related questions. Please see my previous reply for how to contact them.

Regards,
Terje

[loquat]

OK.Thanks.

[loquat]

Supplementary information.
I implemented a simple AoA reception using TimeslotAPI.
The IQ data itself is received. (Not sure if this is correct)
However, GPIO does not work even if it is set with SWITCHPATTERN.
A similar program works without any problems with nRF52833.

----------------------------

sorry, i am mistake.

Apparently only certain pins on P1 can be used with SWITCH.