samples/sensor/bmi270/src/main.c

/*
 * Copyright (c) 2021 Bosch Sensortec GmbH
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/zephyr.h>
#include <zephyr/device.h>
#include <zephyr/drivers/sensor.h>
#include <stdio.h>

void main(void)
{
	const struct device *dev;
	struct sensor_value acc[3], gyr[3];
	struct sensor_value full_scale, sampling_freq, oversampling;

	dev = device_get_binding(DT_LABEL(DT_INST(0, bosch_bmi270)));
	if (dev == NULL) {
		printf("Could not get %s device\n",
		       DT_LABEL(DT_INST(0, bosch_bmi270)));
		return;
	}

	printf("Device %p name is %s\n", dev,
	       DT_LABEL(DT_INST(0, bosch_bmi270)));

	/* Setting scale in G, due to loss of precision if the SI unit m/s^2
	 * is used
	 */
	full_scale.val1 = 2;            /* G */
	full_scale.val2 = 0;
	sampling_freq.val1 = 100;       /* Hz. Performance mode */
	sampling_freq.val2 = 0;
	oversampling.val1 = 1;          /* Normal mode */
	oversampling.val2 = 0;

	sensor_attr_set(dev, SENSOR_CHAN_ACCEL_XYZ, SENSOR_ATTR_FULL_SCALE,
			&full_scale);
	sensor_attr_set(dev, SENSOR_CHAN_ACCEL_XYZ, SENSOR_ATTR_OVERSAMPLING,
			&oversampling);
	/* Set sampling frequency last as this also sets the appropriate
	 * power mode. If already sampling, change to 0.0Hz before changing
	 * other attributes
	 */
	sensor_attr_set(dev, SENSOR_CHAN_ACCEL_XYZ,
			SENSOR_ATTR_SAMPLING_FREQUENCY,
			&sampling_freq);


	/* Setting scale in degrees/s to match the sensor scale */
	full_scale.val1 = 500;          /* dps */
	full_scale.val2 = 0;
	sampling_freq.val1 = 100;       /* Hz. Performance mode */
	sampling_freq.val2 = 0;
	oversampling.val1 = 1;          /* Normal mode */
	oversampling.val2 = 0;

	sensor_attr_set(dev, SENSOR_CHAN_GYRO_XYZ, SENSOR_ATTR_FULL_SCALE,
			&full_scale);
	sensor_attr_set(dev, SENSOR_CHAN_GYRO_XYZ, SENSOR_ATTR_OVERSAMPLING,
			&oversampling);
	/* Set sampling frequency last as this also sets the appropriate
	 * power mode. If already sampling, change sampling frequency to
	 * 0.0Hz before changing other attributes
	 */
	sensor_attr_set(dev, SENSOR_CHAN_GYRO_XYZ,
			SENSOR_ATTR_SAMPLING_FREQUENCY,
			&sampling_freq);

	while (1) {
		/* 10ms period, 100Hz Sampling frequency */
		k_sleep(K_MSEC(10));

		sensor_sample_fetch(dev);

		sensor_channel_get(dev, SENSOR_CHAN_ACCEL_XYZ, acc);
		sensor_channel_get(dev, SENSOR_CHAN_GYRO_XYZ, gyr);

		printf("AX: %d.%06d; AY: %d.%06d; AZ: %d.%06d; "
		       "GX: %d.%06d; GY: %d.%06d; GZ: %d.%06d;\n",
		       acc[0].val1, acc[0].val2,
		       acc[1].val1, acc[1].val2,
		       acc[2].val1, acc[2].val2,
		       gyr[0].val1, gyr[0].val2,
		       gyr[1].val1, gyr[1].val2,
		       gyr[2].val1, gyr[2].val2);
	}
}