MAG3110 3-Axis Magnetometer

Get measurement of magnetic field along the X, Y, and Z axes of the MAG3110 3-Axis chip

  • Library:
  • Simulink Coder Support Package for BBC micro:bit/Magnetometer

Description

The MAG3110 3-Axis Magnetometer block measures the magnetic field along the X, Y, and Z axes. The block has one output port, Magnet. The Magnet port outputs the magnetic field as a [1x3] vector in uT.

Using the parameters of this block, you can select the Output Data Rates (ODR) for the magnetometer. The Output Data Rates (ODR) range from 0.63 Hz to 80 Hz.

Chip Orientation and Axis Orientation Relative to Gravity

Hold the board so that the board faces you and the line to the top of the MAG3110 3-Axis chip is aligned horizontally to the table. At this position, the X-axis is horizontal and points to the left, the Y-axis is vertical and points down, and the Z-axis points toward you.

The direction of the arrows shows the positive direction of the reading for the magnetometer.

When you tilt the board along the X, Y, and Z axes of the chip, this illustration shows the strength of the magnetic field.

Magnetic Strength in X Direction

Hold the board so that the board faces you, and the line to the right of the chip is aligned vertically to the table. The magnetometer on the chip measures the earth magnetic field along each sensor axis. In the resultant [1x3] vector, the first value that represents the magnetic strength at the X-axis is minimum.

Ports

Output

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The block has one output port.

The block outputs the magnetic field as a [1x3] vector. Each value represents the measurement of the magnetic field in μT along the X, Y, and Z axes.

Data Types: double

Parameters

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Specify the rate at which you want the magnetometer to read the measurement of the magnetic field.

When you specify this parameter as-1, Simulink® determines the best sample time for the block based on the block context within the model.