samples: sensor: Add distance measurement sensor sample

Added sample to measure distance

Signed-off-by: Thiyagarajan Pandiyan <psvthiyagarajan@gmail.com>

samples/sensor/distance_polling/CMakeLists.txt

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+# Copyright (c) 2025 Thiyagarajan Pandiyan <psvthiyagarajan@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(distance_polling)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

samples/sensor/distance_polling/README.rst

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+.. zephyr:code-sample:: distance_polling
+   :name: Generic distance measurement
+   :relevant-api: sensor_interface
+
+   Measure distance to an object using a distance sensor
+
+Overview
+********
+
+This sample application periodically measures the distance of an object and
+display it, via the console.
+
+Building and Running
+********************
+
+This sample supports up to 5 distance sensors. Each sensor needs to be aliased
+as ``distanceN`` where ``N`` goes from ``0`` to ``4``. For example:
+
+.. code-block:: devicetree
+
+  / {
+          aliases {
+                  distance0 = &vl53l1x;
+          };
+  };
+
+Make sure the aliases are in devicetree, then build and run with:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/sensor/distance_polling
+   :board: <board to use>
+   :goals: build flash
+   :compact:
+
+Sample Output
+=============
+
+.. code-block:: console
+
+   vl53l1x: 0.153m
+   vl53l1x: 0.154m
+   vl53l1x: 0.154m
+   vl53l1x: 0.153m

samples/sensor/distance_polling/boards/arduino_nicla_vision_stm32h747xx_m7.overlay

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+/*
+ * Copyright (c) 2025 Thiyagarajan Pandiyan <psvthiyagarajan@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		distance0 = &vl53l1x;
+	};
+};

samples/sensor/distance_polling/prj.conf

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+CONFIG_LOG=y
+CONFIG_GPIO=y
+CONFIG_SENSOR=y

samples/sensor/distance_polling/sample.yaml

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+sample:
+  name: Distance measurement sample
+common:
+  tags: sensors
+  harness: console
+  harness_config:
+    type: one_line
+    regex:
+      - "^[a-zA-Z0-9_,+-.]*: [0-9\\.]+m$"
+tests:
+  sample.sensor.distance_polling:
+    filter: dt_alias_exists("distance0")
+    integration_platforms:
+      - arduino_nicla_vision/stm32h747xx/m7     # vl53l1x

samples/sensor/distance_polling/src/main.c

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+/*
+ * Copyright (c) 2025 Thiyagarajan Pandiyan <psvthiyagarajan@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdio.h>
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include <zephyr/drivers/sensor.h>
+
+#define DISTANCE_ALIAS(i) DT_ALIAS(_CONCAT(distance, i))
+#define DISTANCE_SENSOR(i, _)                                                                      \
+	IF_ENABLED(DT_NODE_EXISTS(DISTANCE_ALIAS(i)), (DEVICE_DT_GET(DISTANCE_ALIAS(i)),))
+
+/* support up to 5 distance sensors */
+static const struct device *const sensors[] = {LISTIFY(5, DISTANCE_SENSOR, ())};
+
+static void fetch_and_display(const struct device *sensor)
+{
+	struct sensor_value distance;
+	int rc = sensor_sample_fetch(sensor);
+
+	if (rc < 0) {
+		printf("ERROR: Fetch failed: %d\n", rc);
+		return;
+	}
+
+	rc = sensor_channel_get(sensor, SENSOR_CHAN_DISTANCE, &distance);
+	if (rc < 0) {
+		printf("ERROR: get failed: %d\n", rc);
+	} else {
+		printf("%s: %d.%03dm\n", sensor->name, distance.val1, distance.val2);
+	}
+}
+
+int main(void)
+{
+	size_t i = 0;
+
+	for (i = 0; i < ARRAY_SIZE(sensors); i++) {
+		if (!device_is_ready(sensors[i])) {
+			printf("Error: Device \"%s\" is not ready\n", sensors[i]->name);
+			return 0;
+		}
+	}
+
+	while (true) {
+		for (i = 0; i < ARRAY_SIZE(sensors); i++) {
+			fetch_and_display(sensors[i]);
+			k_sleep(K_MSEC(500));
+		}
+	}
+
+	return 0;
+}