3.9.2.3 class AccelerometerXYZAxisData

Class Attributes

Set/Get Property

This sensor class provides additional functions that can be used to set or get some of the properties specific to this sensor.

The following table lists the set/get properties of the sensor class:

Set/Get properties Description
get_available_data_rates() Returns the data rates that can be used for this channel.
set_data_rate(data_rate) Sets the data rate to be used for this channel.
get_data_rate() Returns the current data rate for this channel.
set_measure_range(measurerange) Sets the measure range. Pass 0 to set +-2g, 1 for +-8g
get_measure_range() Returns the current measure range. Returns 0 for +-2g, 1 for +-8g

Example

from sensor import *
import e32
import time


class DemoApp():

    def __init__(self):
        self.accelerometer = \
            AccelerometerXYZAxisData(data_filter=LowPassFilter())
        self.accelerometer.set_callback(data_callback=self.my_callback)
        self.counter = 0

    def my_callback(self):
        # For stream sensor data the callback is hit 35 times per sec(On 5800).
        # The device cannot handle resource hungry operations like print in the
        # callback function for such high frequencies. A workaround is to
        # sample the data as demonstrated below.
        if self.counter % 5 == 0:
            print  "X:%s, Y:%s, Z:%s" % (self.accelerometer.x,
                                    self.accelerometer.y, self.accelerometer.z)
            print "Timestamp:", self.accelerometer.timestamp
        self.counter = self.counter + 1

    def run(self):
        self.accelerometer.start_listening()

if __name__ == '__main__':
    d = DemoApp()
    d.run()
    e32.ao_sleep(5)
    d.accelerometer.stop_listening()
    print "Exiting Accelorometer"

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