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Atmel AVR4016
7.6.1 Example code sequence
7.6.1.1 Definitions and declarations
#include "sensor.h"
sensor_t
sensor_data_t
compass_dev;
mag_data;
// device descriptor
// magnetic data from device
7.6.1.2 Sensor initialization
sensor_attach (&compass_dev, SENSOR_TYPE_COMPASS, 0, 0);
7.6.1.3 Sensor read
mag_data.scaled = true;
// read values in uTesla
sensor_get_field (&compass_dev, &mag_data);
7.6.1.4 Use data in application
int32_t
int32_t
int32_t
app_x_value
app_y_value
app_z_value
= mag_data.axis.x;
= mag_data.axis.y;
= mag_data.axis.z;
uint32_t app_read_time = mag_data.timestamp
7.7 Atmospheric pressure
Atmospheric pressure is measured using a barometric pressure sensor. The
sensor_get_pressure() function reads the sensor and returns the measured
pressure. The function takes the following form:
sensor_get_pressure (&device, &press_data);
where device is the device descriptor of the pressure sensor and press_data is a
sensor_data_t structure to receive the pressure data.
Scaled pressure measurements are expressed in Pascal. When the function returns,
the value can be read from the pressure_data structure using the pressure.value
field.
7.7.1 Example code sequence
7.7.1.1 Definitions and declarations
#include "sensor.h"
sensor_t
sensor_data_t
press_dev;
press_data;
// device descriptor
// pressure data from device
7.7.1.2 Sensor initialization
sensor_attach (&press_dev, SENSOR_TYPE_BAROMETER, 0, 0);
7.7.1.3 Sensor read
pressure_data.scaled = true;
// read values in pascals
sensor_get_pressure (&press_dev, &press_data);
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8367B-AVR-06/11
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