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zephyr/samples/bluetooth/direction_finding_central
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Gerard Marull-Paretas c7b5b3c419 samples: migrate includes to contain <zephyr/...> prefix 
In order to bring consistency in-tree, migrate all samples to the use
the new prefix <zephyr/...>. Note that the conversion has been scripted:

```python
from pathlib import Path
import re

EXTENSIONS = ("c", "h", "cpp", "rst")

for p in Path(".").glob("samples/**/*"):
    if not p.is_file() or p.suffix and p.suffix[1:] not in EXTENSIONS:
        continue

    content = ""
    with open(p) as f:
        for line in f:
            m = re.match(r"^(.*)#include <(.*)>(.*)$", line)
            if (m and
                not m.group(2).startswith("zephyr/") and
                (Path(".") / "include" / "zephyr" / m.group(2)).exists()):
                content += (
                    m.group(1) +
                    "#include <zephyr/" + m.group(2) +">" +
                    m.group(3) + "\n"
                )
            else:
                content += line

    with open(p, "w") as f:
        f.write(content)
```

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
 		2022-05-06 11:29:59 +02:00
..
boards everywhere: fix typos 2022-03-18 13:24:08 -04:00
src samples: migrate includes to contain <zephyr/...> prefix 2022-05-06 11:29:59 +02:00
CMakeLists.txt
…
README.rst samples: Bluetooth: df: Forward GPIO pins from app to network core 2022-03-11 11:35:46 -08:00
overlay-aod.conf samples: Bluetooth: df: Fix problem with samples split build 2022-02-17 13:07:12 +01:00
prj.conf
…
sample.yaml tests: Change duplicated names of the test cases 2022-03-30 17:42:01 -04:00

README.rst 

.. _bluetooth_direction_finding_central:

Bluetooth: Direction Finding Central
####################################

Overview
********

A simple application demonstrating the BLE Direction Finding CTE reception in
connected mode by requesting transmission of a packet containing Constant
Tone Extension by connected peer device.

Requirements
************

* Nordic nRF SoC based board with Direction Finding support (example boards:
  :ref:`nrf52833dk_nrf52833`, :ref:`nrf52833dk_nrf52820`, :ref:`nrf5340dk_nrf5340`)
* Antenna matrix for AoA (optional)

Check your SoC's product specification for Direction Finding support if you are
unsure.

Building and Running
********************

By default the application supports Angle of Arrival and Angle of Departure mode.

To use Angle of Departure mode only, build this application as follows,
changing ``nrf52833dk_nrf52833`` as needed for your board:

.. zephyr-app-commands::
   :zephyr-app: samples/bluetooth/direction_finding_central
   :host-os: unix
   :board: nrf52833dk_nrf52833
   :gen-args: -DOVERLAY_CONFIG=overlay-aod.conf
   :goals: build flash
   :compact:

To run the application on nRF5340DK, a Bluetooth controller application must
also run on the network core. The :ref:`bluetooth-hci-rpmsg-sample` sample
application may be used. To build this sample with direction finding support
enabled:

* Copy
  :zephyr_file:`samples/bluetooth/direction_finding_central/boards/nrf52833dk_nrf52833.overlay`
  to a new file,
  :file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`.
* Make sure the same GPIO pins are assigned to Direction Finding Extension in file
  :zephyr_file:`samples/bluetooth/direction_finding_central/boards/nrf5340dk_nrf5340_cpuapp.overlay`.
  as those in the created file  :file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`.
* Copy
  :zephyr_file:`samples/bluetooth/direction_finding_central/boards/nrf52833dk_nrf52833.conf`
  to a new file,
  :file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.conf`.

Antenna matrix configuration
****************************

To use this sample with Angle of Arrival enabled on Nordic SoCs, additional
configuration must be provided via :ref:`devicetree <dt-guide>` to enable
control of the antenna array.

An example devicetree overlay is in
:zephyr_file:`samples/bluetooth/direction_finding_central/boards/nrf52833dk_nrf52833.overlay`.
You can customize this overlay when building for the same board, or create your
own board-specific overlay in the same directory for a different board. See
:dtcompatible:`nordic,nrf-radio` for documentation on the properties used in
this overlay. See :ref:`set-devicetree-overlays` for information on setting up
and using overlays.

Note that antenna matrix configuration for the nRF5340 SoC is part of the
network core application. When :ref:`bluetooth-hci-rpmsg-sample` is used as the
network core application, the antenna matrix configuration should be stored in
the file
:file:`samples/bluetooth/hci_rpmsg/boards/nrf5340dk_nrf5340_cpunet.overlay`
instead.