blob: a6ed51a768ac4d3a4f652cedcf3bf9a670bc77ea [file] [log] [blame]
/*
* Copyright (c) 2017 Linaro Limited
* Copyright (c) 2019 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/sensor.h>
#include <stdio.h>
#include <zephyr/sys/util.h>
static void process_sample(const struct device *dev)
{
static unsigned int obs;
struct sensor_value pressure, temp;
if (sensor_sample_fetch(dev) < 0) {
printf("Sensor sample update error\n");
return;
}
if (sensor_channel_get(dev, SENSOR_CHAN_PRESS, &pressure) < 0) {
printf("Cannot read LPS22HH pressure channel\n");
return;
}
if (sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp) < 0) {
printf("Cannot read LPS22HH temperature channel\n");
return;
}
++obs;
printf("Observation: %u\n", obs);
/* display pressure */
printf("Pressure: %.3f kPa\n", sensor_value_to_double(&pressure));
/* display temperature */
printf("Temperature: %.2f C\n", sensor_value_to_double(&temp));
}
static void lps22hh_handler(const struct device *dev,
const struct sensor_trigger *trig)
{
process_sample(dev);
}
int main(void)
{
const struct device *const dev = DEVICE_DT_GET_ONE(st_lps22hh);
if (!device_is_ready(dev)) {
printk("sensor: device not ready.\n");
return 0;
}
if (IS_ENABLED(CONFIG_LPS22HH_TRIGGER)) {
struct sensor_value attr = {
.val1 = 1,
};
struct sensor_trigger trig = {
.type = SENSOR_TRIG_DATA_READY,
.chan = SENSOR_CHAN_ALL,
};
if (sensor_attr_set(dev, SENSOR_CHAN_ALL,
SENSOR_ATTR_SAMPLING_FREQUENCY, &attr) < 0) {
printf("Cannot configure sampling rate\n");
return 0;
}
if (sensor_trigger_set(dev, &trig, lps22hh_handler) < 0) {
printf("Cannot configure trigger\n");
return 0;
}
printk("Configured for triggered collection at %u Hz\n",
attr.val1);
}
while (!IS_ENABLED(CONFIG_LPS22HH_TRIGGER)) {
process_sample(dev);
k_sleep(K_MSEC(2000));
}
k_sleep(K_FOREVER);
return 0;
}