ecompass_peripheral#
Overview#
The code of this demo has been prepared and updated for use with the MCUXpresso Configuration Tools (Pins/Clocks/Peripherals). The E-Compass demo application demonstrates the use of the FXOS8700 sensor. The tilt-compensated algorithm calculates all three angles (pitch, roll, and yaw or compass heading). You can open the mex file with MCUXpresso Config Tool to do further configuration of pin, clock and peripheral.
Supported Boards#
FRDM-K22F
Hardware requirements
Mini/micro USB cable
FRDMK22F board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, you can see the information below printed to the terminal.
Note: you must rotate the board 360 degrees to get the max / min value of the magnetic field.
To calibrate Magnetometer, roll the board on all orientations to get max and min values
Press any key to start calibrating...
Calibrating magnetometer...
Calibrate magnetometer successfully!
Magnetometer offset Mx: 313 - My: 432 - Mz: 494
Compass Angle: xxxx
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
FRDM-KE15Z
Hardware requirements
Micro USB cable
FRDM-KE15Z board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below. Note: you must rotate the board 360 degrees to get max , min value magnetic field.
To calibrate Magnetometer, roll the board on all orientations to get max and min values
Press any key to start calibrating...
Calibrating magnetometer...
Calibrate magnetometer successfully!
Magnetometer offset Mx: 348 - My: 99 - Mz: 117
Compass Angle: -54.8
FRDM-KE17Z
Hardware requirements
Micro USB cable
FRDM-KE17Z board
Personal Computer
Board settings
Make sure the FXOS8700CQ(U12) on the board is installed to run this demo. No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, you can see the similar information from the terminal as below. Note: you must rotate the board 360 degrees to get max , min value magnetic field.
To calibrate Magnetometer, roll the board on all orientations to get max and min values
Press any key to start calibrating...
Calibrating magnetometer...
Calibrate magnetometer successfully!
Magnetometer offset Mx: 348 - My: 99 - Mz: 117
Compass Angle: -54.8