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FXAS21002C Module

This module contains the driver for NXP FXAS21002C gyroscope for measuring the angular velocity. The FXAS21002C provides direct I2C communication and can be set on 4 different full-scale range and 8 different over sample rate values (datasheet).

class FXAS21002C

class FXAS21002C(i2cdrv,addr=0x20,clk=400000)

Creates an intance of a new FXAS21002C.

Arguments:

  • i2cdrv – I2C Bus used ‘( I2C0, … )’
  • addr – Slave address, default 0x20
  • clk – Clock speed, default 400kHz

Example:

from nxp.fxas21002c import fxas21002c

...

fxas = fxas21002c.FXAS21002C(I2C0)
fxas.start()
fxas.init()
gyro = fxas.get_gyro()
FXAS21002C.init

init(fsr=0,odr=2,fs_exp=0)

Initialize the FXAS21002C setting the mode value.

Arguments:

  • fsr – select the full-scale range (from 0 to 3 - refer to page 39 of the FXAS21002C datasheet), default 0
  • odr – set the over sample rate (from 0 to 7 - refer to page 46 of the FXAS21002C datasheet), default 2
  • fs_exp – Full-scale range expansion enable (allowed values 0,1 - refer to page 49 of the FXAS21002C datasheet), default 0
FSR Value FS_EXP Value Degrees per Second
0 0 2000 dps
1 0 1000 dps
2 0 500 dps
3 0 250 dps
0 1 4000 dps
1 1 2000 dps
2 1 1000 dps
3 1 500 dps
ODR Value Frequency
0 800 Hz
1 400 Hz
2 200 Hz
3 100 Hz
4 50 Hz
5 25 HZ
6 12.5 Hz
7 12.5 Hz
FXAS21002C.get_raw_gyro

get_raw_gyro()

Retrieves the current gyroscope data as a tuple of X, Y, Z, raw values.

Returns [gyro_x, gyro_y, gyro_z].

FXAS21002C.get_raw_int_temp

get_raw_int_temp()

Retrieves the current device internal temperature data as raw value.

Returns raw_t.

FXAS21002C.get_gyro

get_gyro(axis=None)

Retrieves the current gyroscope data in degrees per second as a tuple of X, Y, Z values or single axis value if axis argument is provided.

Arguments: axis – select the axis (allowed values: “x” for x-axis, “y” for y-axis, “z” for z-axis); default None for all values.

Returns: [gyro_x, gyro_y, gyro_z] or gyro_x or gyro_y or gyro_z.

FXAS21002C.get_int_temp

get_int_temp(unit="C")

Retrieves the current device internal temperature value in Celtius, Kelvin or Fahrenheit degrees.

Arguments: unit – select the unit of measure for internal temperature (allowed values: “C” for Celtius degrees, “K” for Kelvin degrees, “F” Fahrenheit degrees); default “C”.

Returns int_temp.