| /* |
| * Copyright (c) 2017 Linaro Limited |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr.h> |
| #include <device.h> |
| #include <drivers/sensor.h> |
| #include <stdio.h> |
| #include <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 LPS22HB pressure channel\n"); |
| return; |
| } |
| |
| if (sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp) < 0) { |
| printf("Cannot read LPS22HB temperature channel\n"); |
| return; |
| } |
| |
| ++obs; |
| printf("Observation:%u\n", obs); |
| |
| /* display pressure */ |
| printf("Pressure:%.1f kPa\n", sensor_value_to_double(&pressure)); |
| |
| /* display temperature */ |
| printf("Temperature:%.1f C\n", sensor_value_to_double(&temp)); |
| |
| } |
| |
| void main(void) |
| { |
| const struct device *dev = device_get_binding(DT_LABEL(DT_INST(0, st_lps22hb_press))); |
| |
| if (dev == NULL) { |
| printf("Could not get LPS22HB device\n"); |
| return; |
| } |
| |
| while (true) { |
| process_sample(dev); |
| k_sleep(K_MSEC(2000)); |
| } |
| } |