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samples: Bluetooth: df_tx: Add information about nRF5340 to README.rst

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Add information about support of nRF5340 SOC in the sample
README.rst.

Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>
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Piotr Pryga 2021-06-09 13:11:26 +02:00 • committed by Johan Hedberg
commit c1cff75589
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samples/bluetooth/direction_finding_connectionless_tx/README.rst
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@ -13,6 +13,7 @@ functionality by sending Constant Tone Extension with periodic advertising PDUs.
Requirements
************
* nRF5340DK board
* nRF52833DK board with nRF52833 SOC
* nRF52833DK board with nRF52820 SOC
* antenna matrix for AoD (optional)
@ -36,6 +37,21 @@ To use Angle of Arrival mode only, build this application as follows:
:goals: build flash
:compact:
To run the application on nRF5340DK there must be provided a child image aimed to
run on network core. :zephyr_file:`samples/bluetooth/hci_rpmsg` sample application
may be used for that purpose.
To build :zephyr_file:`samples/bluetooth/hci_rpmsg` sample with direction finding
support enabled:
* create :zephyr_file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`
with the same content as :zephyr_file:`samples/bluetooth/direction_finding_connectionless_tx/
boards/nrf52833dk_nrf52833.overlay`
* create :zephyr_file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.conf`
file. Copy content of :zephyr_file:`samples/bluetooth/direction_finding_connectionless_tx/boards/
nrf52833dk_nrf52833.conf. Add CONFIG_BT_EXT_ADV=y configuration entry to enable extended size
of :code:`CONFIG_BT_BUF_CMD_TX_SIZE` config to support LE Set Extended Advertising Data command.
See :ref:`bluetooth samples section <bluetooth-samples>` for common information
about bluetooth samples.
@ -55,6 +71,11 @@ to enable antenna switching. GPIOS are used by Radio peripheral in order followi
indices of :code:`dfegpio#-gpios` properties. The order is important because it
affects mapping of antenna switch patterns to GPIOS (see `Antenna patterns`_).
Antenna matrix configuration for nRF5340DK SOC is part of child image that is run
on network core. When :zephyr_file:`samples/bluetooth/hci_rpmsg` is used as network
core application, the antenna matrix configuration is stored in the :zephyr_file:`samples/
bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`.
Antenna patterns
****************
The antenna switch pattern is a binary number where each bit is applied to