bluetooth: samples: hci_uart: Add support for nrf52833dk

Adds support for the nrf52833dk_nrf52833 which supports
the Direction Finding feature. It allows also to perform
the Direct Test Mode with the CTE feature.

Signed-off-by: Kamil Gawor <[email protected]>

Author: Kamil Gawor

samples/bluetooth/hci_uart/boards/nrf52833dk_nrf52833.overlay

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ &uart0 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <1000000>;
+	status = "okay";
+	hw-flow-control;
+};

samples/bluetooth/hci_uart/boards/nrf52833dk_nrf52833_df.overlay

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ &uart0 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <1000000>;
+	status = "okay";
+	hw-flow-control;
+};
+
+&radio {
+	status = "okay";
+	/* This is an example number of antennas that may be available
+	 * on antenna matrix board.
+	 */
+	dfe-antenna-num = <10>;
+	/* This is an example switch pattern that will be used to set an
+	 * antenna for Tx PDU (period before start of Tx CTE).
+	 */
+	dfe-pdu-antenna = <0x0>;
+
+	/* These are example GPIO pin numbers that are provided to
+	 * Radio peripheral. The pins will be acquired by Radio to
+	 * drive antenna switching when AoD is enabled.
+	 */
+	dfegpio0-gpios = <&gpio0 3 0>;
+	dfegpio1-gpios = <&gpio0 4 0>;
+	dfegpio2-gpios = <&gpio0 28 0>;
+	dfegpio3-gpios = <&gpio0 29 0>;
+};

samples/bluetooth/hci_uart/sample.yaml

@@ -12,3 +12,18 @@ tests:
     platform_allow: 96b_nitrogen nrf51dk_nrf51422
       nrf52dk_nrf52832
     tags: uart bluetooth
+  sample.bluetooth.hci_uart.nrf52833.df:
+    harness: bluetooth
+    platform_allow: nrf52833dk_nrf52833
+    extra_args: DTC_OVERLAY_FILE=./boards/nrf52833dk_nrf52833_df.overlay
+    extra_configs:
+      - CONFIG_BT_CTLR_DF=y
+    tags: uart bluetooth
+  sample.bluetooth.hci_uart.nrf52833.df.iq_report:
+    harness: bluetooth
+    platform_allow: nrf52833dk_nrf52833
+    extra_args: DTC_OVERLAY_FILE=./boards/nrf52833dk_nrf52833_df.overlay
+    extra_configs:
+      - CONFIG_BT_CTLR_DF=y
+      - CONFIG_BT_CTLR_DTM_HCI_DF_IQ_REPORT=y
+    tags: uart bluetooth