samples: sensor: bme680 added sample code

Sample code for the BME680 environmental sensor

Signed-off-by: Bosch Sensortec <[email protected]>

samples/sensor/bme680/CMakeLists.txt

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+#
+# Copyright (c) 2018 Bosch Sensortec GmbH
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+cmake_minimum_required(VERSION 3.13.1)
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(NONE)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

samples/sensor/bme680/README.rst

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+.. _bme680:
+
+BME680: Integrated environmental sensor
+#####################################################
+
+Description
+***********
+
+This sample application periodically (every 3s) measures the ambient temperature
+in degrees Celsius, atmospheric pressure in kilopascal, relative humidity in percentage,
+and gas sensor resistance in ohms. The result is written to the console.
+
+References
+**********
+
+ - BME680: https://www.bosch-sensortec.com/bst/products/all_products/bme680
+
+Wiring
+*******
+
+This sample uses the BME680 sensor controlled using the I2C interface.
+Connect Supply: **VDD**, **VDDIO**, **GND** and Interface: **SDA**, **SCL**.
+The supply voltage can be in the 1.8V to 3.6V range.
+Depending on the baseboard used, the **SDA** and **SCL** lines require Pull-Up
+resistors.
+
+Building and Running
+********************
+
+This project outputs sensor data to the console. It requires a BME680
+sensor. It should work with any platform featuring a I2C peripheral interface.
+It does not work on QEMU.
+In this example below the :ref:`nrf52_pca10040` board is used.
+
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/sensors/bme680
+   :board: nrf52_pca10040
+   :goals: build flash
+
+Sample Output
+=============
+
+.. code-block:: console
+
+   Device 0x20002b74 name is BME680
+   T: 23.988877; P: 97.648568; H: 53.689533; G: 1035.211466
+   T: 24.168500; P: 97.648866; H: 53.565966; G: 1046.677896
+   T: 24.336533; P: 97.648596; H: 53.353663; G: 1058.656533
+   T: 24.589696; P: 97.648366; H: 53.958864; G: 1072.155863
+   T: 24.856631; P: 97.648322; H: 53.553669; G: 1096.448788
+
+<repeats endlessly>

samples/sensor/bme680/prj.conf

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+CONFIG_STDOUT_CONSOLE=y
+CONFIG_I2C=y
+CONFIG_SENSOR=y
+CONFIG_BME680=y
+

samples/sensor/bme680/sample.yaml

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+sample:
+  name: BME680 Sensor sample
+tests:
+  test:
+    harness: sensor
+    tags: samples sensor
+    depends_on: i2c bme680

samples/sensor/bme680/src/main.c

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+/*
+ * Copyright (c) 2018 Bosch Sensortec GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr.h>
+#include <device.h>
+#include <sensor.h>
+#include <stdio.h>
+
+void main(void)
+{
+	struct device *dev = device_get_binding(DT_BOSCH_BME680_0_LABEL);
+	struct sensor_value temp, press, humidity, gas_res;
+
+	printf("Device %p name is %s\n", dev, dev->config->name);
+
+	while (1) {
+		k_sleep(3000);
+
+		sensor_sample_fetch(dev);
+		sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
+		sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
+		sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &humidity);
+		sensor_channel_get(dev, SENSOR_CHAN_GAS_RES, &gas_res);
+
+		printf("T: %d.%06d; P: %d.%06d; H: %d.%06d; G: %d.%06d\n",
+				temp.val1, temp.val2, press.val1, press.val2,
+				humidity.val1, humidity.val2, gas_res.val1,
+				gas_res.val2);
+	}
+}