1 /*
2 * Copyright (c) 2024 TDK Invensense
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/device.h>
9 #include <zephyr/devicetree.h>
10 #include <zephyr/drivers/sensor.h>
11 #include <stdio.h>
12
13 /*
14 * Get a device structure from a devicetree node from alias
15 * "pressure_sensor".
16 */
get_pressure_sensor_device(void)17 static const struct device *get_pressure_sensor_device(void)
18 {
19 const struct device *const dev = DEVICE_DT_GET(DT_ALIAS(pressure_sensor));
20
21 if (!device_is_ready(dev)) {
22 printk("\nError: Device \"%s\" is not ready; "
23 "check the driver initialization logs for errors.\n",
24 dev->name);
25 return NULL;
26 }
27
28 printk("Found device \"%s\", getting sensor data\n", dev->name);
29 return dev;
30 }
31
main(void)32 int main(void)
33 {
34 const struct device *dev = get_pressure_sensor_device();
35 int ret;
36
37 if (dev == NULL) {
38 return 0;
39 }
40 struct sensor_value pressure;
41 struct sensor_value temperature;
42 struct sensor_value altitude;
43
44 printk("Starting pressure, temperature and altitude polling sample.\n");
45
46 while (1) {
47 if (sensor_sample_fetch_chan(dev, SENSOR_CHAN_ALL) == 0) {
48 sensor_channel_get(dev, SENSOR_CHAN_PRESS, &pressure);
49 sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temperature);
50 ret = sensor_channel_get(dev, SENSOR_CHAN_ALTITUDE, &altitude);
51
52 printk("temp %.2f Cel, pressure %f kPa",
53 sensor_value_to_double(&temperature),
54 sensor_value_to_double(&pressure));
55 if (ret == 0) {
56 printk(", altitude %f m", sensor_value_to_double(&altitude));
57 }
58 printk("\n");
59 }
60
61 k_msleep(1000);
62 }
63 return 0;
64 }
65