124 lines
3.0 KiB
ReStructuredText
124 lines
3.0 KiB
ReStructuredText
|
.. currentmodule:: zsensor
|
||
|
|
|
||
|
|
:mod:`zsensor` --- Zephyr sensor bindings
|
||
|
|
=========================================
|
||
|
|
|
||
|
|
.. module:: zsensor
|
||
|
|
:synopsis: zephyr sensor bindings
|
||
|
|
|
||
|
|
The ``zsensor`` module contains a class for using sensors with Zephyr.
|
||
|
|
|
||
|
|
.. _zsensor.Sensor:
|
||
|
|
|
||
|
|
class Sensor --- sensor control for the Zephyr port
|
||
|
|
---------------------------------------------------
|
||
|
|
|
||
|
|
Use this class to access data from sensors on your board.
|
||
|
|
See Zephyr documentation for sensor usage here: `Sensors
|
||
|
|
<https://docs.zephyrproject.org/latest/reference/peripherals/sensor.html?highlight=sensor#sensors>`_.
|
||
|
|
|
||
|
|
Sensors are defined in the Zephyr devicetree for each board. The quantities that a given sensor can
|
||
|
|
measure are called a sensor channels. Sensors can have multiple channels to represent different axes
|
||
|
|
of one property or different properties a sensor can measure. See `Channels`_ below for defined sensor
|
||
|
|
channels.
|
||
|
|
|
||
|
|
Constructor
|
||
|
|
~~~~~~~~~~~
|
||
|
|
|
||
|
|
.. class:: Sensor(device_name)
|
||
|
|
|
||
|
|
Device names are defined in the devicetree for your board.
|
||
|
|
For example, the device name for the accelerometer in the FRDM-k64f board is "FXOS8700".
|
||
|
|
|
||
|
|
Methods
|
||
|
|
~~~~~~~
|
||
|
|
|
||
|
|
.. method:: Sensor.measure()
|
||
|
|
|
||
|
|
Obtains a measurement sample from the sensor device using Zephyr sensor_sample_fetch and
|
||
|
|
stores it in an internal driver buffer as a useful value, a pair of (integer part of value,
|
||
|
|
fractional part of value in 1-millionths).
|
||
|
|
Returns none if successful or OSError value if failure.
|
||
|
|
|
||
|
|
.. method:: Sensor.get_float(sensor_channel)
|
||
|
|
|
||
|
|
Returns the value of the sensor measurement sample as a float.
|
||
|
|
|
||
|
|
.. method:: Sensor.get_micros(sensor_channel)
|
||
|
|
|
||
|
|
Returns the value of the sensor measurement sample in millionths.
|
||
|
|
(Ex. value of ``(1, 500000)`` returns as ``1500000``)
|
||
|
|
|
||
|
|
.. method:: Sensor.get_millis(sensor_channel)
|
||
|
|
|
||
|
|
Returns the value of sensor measurement sample in thousandths.
|
||
|
|
(Ex. value of ``(1, 500000)`` returns as ``1500``)
|
||
|
|
|
||
|
|
.. method:: Sensor.get_int(sensor_channel)
|
||
|
|
|
||
|
|
Returns only the integer value of the measurement sample.
|
||
|
|
(Ex. value of ``(1, 500000)`` returns as ``1``)
|
||
|
|
|
||
|
|
Channels
|
||
|
|
~~~~~~~~
|
||
|
|
|
||
|
|
.. data:: ACCEL_X
|
||
|
|
|
||
|
|
Acceleration on the X axis, in m/s^2.
|
||
|
|
|
||
|
|
.. data:: ACCEL_Y
|
||
|
|
|
||
|
|
Acceleration on the Y axis, in m/s^2.
|
||
|
|
|
||
|
|
.. data:: ACCEL_Z
|
||
|
|
|
||
|
|
Acceleration on the Z axis, in m/s^2.
|
||
|
|
|
||
|
|
.. data:: GYRO_X
|
||
|
|
|
||
|
|
Angular velocity around the X axis, in radians/s.
|
||
|
|
|
||
|
|
.. data:: GYRO_Y
|
||
|
|
|
||
|
|
Angular velocity around the Y axis, in radians/s.
|
||
|
|
|
||
|
|
.. data:: GYRO_Z
|
||
|
|
|
||
|
|
Angular velocity around the Z axis, in radians/s.
|
||
|
|
|
||
|
|
.. data:: MAGN_X
|
||
|
|
|
||
|
|
Magnetic field on the X axis, in Gauss.
|
||
|
|
|
||
|
|
.. data:: MAGN_Y
|
||
|
|
|
||
|
|
Magnetic field on the Y axis, in Gauss.
|
||
|
|
|
||
|
|
.. data:: MAGN_Z
|
||
|
|
|
||
|
|
Magnetic field on the Z axis, in Gauss.
|
||
|
|
|
||
|
|
.. data:: DIE_TEMP
|
||
|
|
|
||
|
|
Device die temperature in degrees Celsius.
|
||
|
|
|
||
|
|
.. data:: PRESS
|
||
|
|
|
||
|
|
Pressure in kilopascal.
|
||
|
|
|
||
|
|
.. data:: PROX
|
||
|
|
|
||
|
|
Proximity. Dimensionless. A value of 1 indicates that an object is close.
|
||
|
|
|
||
|
|
.. data:: HUMIDITY
|
||
|
|
|
||
|
|
Humidity, in percent.
|
||
|
|
|
||
|
|
.. data:: LIGHT
|
||
|
|
|
||
|
|
Illuminance in visible spectrum, in lux.
|
||
|
|
|
||
|
|
.. data:: ALTITUDE
|
||
|
|
|
||
|
|
Altitude, in meters.
|