samples: sensor: nooploop: add TOFSense uart demo

Provide a demo of the Nooploop TOFSense sensor on a nucleo_u575zi_q
board.

Signed-off-by: Alex Fabre <alex.fabre@rtone.fr>

Author: AlexFabre

samples/sensor/tofsense/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(tofsense)
+
+target_sources(app PRIVATE src/main.c)

samples/sensor/tofsense/README.rst

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+.. zephyr:code-sample:: tofsense
+   :name: TOFSense Time Of Flight sensor
+   :relevant-api: sensor_interface
+
+   Get distance data from a TOFSense sensor (interrupt mode).
+
+Overview
+********
+
+This sample periodically measures distance between TOFSense sensor
+and target. The result is displayed on the console.
+
+Requirements
+************
+
+This sample uses the TOFSense sensor with its factory default settings, on the UART interface.
+
+References
+**********
+
+ - Datasheet: https://ftp.nooploop.com/downloads/tofsense/TOFSense_Datasheet_V3.0_en.pdf
+ - User manual: https://ftp.nooploop.com/downloads/tofsense/TOFSense_User_Manual_V3.0_en.pdf
+
+Building and Running
+********************
+
+This project outputs sensor data to the console. It requires a TOFSense
+sensor to be plugged on UART2 (UART on CN9 connector of all ST nucleo boards).
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/sensor/tofsense/
+   :board: nucleo_u575zi_q
+   :goals: build flash
+
+
+Sample Output
+=============
+
+.. code-block:: console
+
+   distance is 000 mm
+
+   distance is 1888 mm
+
+   <repeats endlessly every 5 seconds>

samples/sensor/tofsense/boards/nucleo_u575zi_q.overlay

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+/*
+ * Copyright (c) 2025 Alex Fabre
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/sensor/tofsense.h>
+
+/ {
+	aliases {
+		tof = &tofsense;
+	};
+};
+
+&usart2 {
+	current-speed = <115200>;
+	tofsense: tofsense {
+		compatible = "nooploop,tofsense";
+		status = "okay";
+		id = <0>;
+		operating-mode = <TOFSENSE_MODE_ACTIVE>;
+		active-mode-frequency = <30>;
+	};
+};

samples/sensor/tofsense/prj.conf

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+CONFIG_SENSOR=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+CONFIG_CAN=y
+
+#debug
+CONFIG_DEBUG=y
+CONFIG_LOG=y
+CONFIG_SENSOR_LOG_LEVEL_INF=y

samples/sensor/tofsense/sample.yaml

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+sample:
+  name: Sample for Nooploop TOFsens Time Of Flight sensor
+tests:
+  sample.sensor.tofsense:
+    depends_on:
+      - uart
+    tags:
+      - sensors
+    filter: dt_compat_enabled("nooploop,tofsense")
+    harness: console
+    harness_config:
+      type: multi_line
+      regex:
+        - "distance is .*"

samples/sensor/tofsense/src/main.c

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+/*
+ * Copyright (c) 2025 Alex Fabre
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include <zephyr/drivers/sensor.h>
+#include <zephyr/sys/printk.h>
+
+int main(void)
+{
+	const struct device *const dev = DEVICE_DT_GET_ONE(nooploop_tofsense);
+	struct sensor_value value;
+	int ret;
+
+	if (!device_is_ready(dev)) {
+		printk("sensor: device not ready.\n");
+		return 0;
+	}
+
+	while (1) {
+		ret = sensor_sample_fetch(dev);
+		if (ret) {
+			printk("sensor_sample_fetch failed ret %d\n", ret);
+			return 0;
+		}
+
+		ret = sensor_channel_get(dev, SENSOR_CHAN_DISTANCE, &value);
+		printk("distance is %3lld mm\n", sensor_value_to_milli(&value));
+
+		printk("\n");
+		k_sleep(K_MSEC(5000));
+	}
+	return 0;
+}