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Denise SANFILIPPO
ST Employee
February 19, 2025

How to develop context-aware applications with STEVAL-MKI109D

  • February 19, 2025
  • 0 replies
  • 2765 views

Summary

This article showcases the recently released STEVAL-MKI109D evaluation board, designed for all ST MEMS sensors. This evaluation board can be used to evaluate a sensor for a new application, analyze data from different sensors, and build and test a configuration for ST MEMS sensors. Users can thus develop context-aware applications with MEMS sensors more quickly, powerfully and flexibly.

Introduction

The new STEVAL-MKI109D board is the new evaluation board for all ST MEMS sensors and it allows:

  • Plugging different MEMS sensors through DIL24 adapter boards.
  • Showing sensor outputs in a graphical user interface, perform data logging and data analysis.

Figure 1: MEMS Studio - Sensor Evaluation, Line ChartsFigure 1: MEMS Studio - Sensor Evaluation, Line Charts

 

  • Setting up a sensor configuration, or configuring the advanced features available in the latest MEMS sensors.

Figure 2: MEMS Studio - Sensor Evaluation, FFTFigure 2: MEMS Studio - Sensor Evaluation, FFT

 

The STEVAL-MKI109D is the successor of the STEVAL-MKI109V3, and it continuously supports functionalities like:

  • A programmable voltage power supply.
  • An on-board dedicated circuitry for current measurement tests.
  • Communication protocol changes on the fly.
Figure 3: MEMS Studio - Sensor Evaluation, switch communication interfaceFigure 3: MEMS Studio - Sensor Evaluation, switch communication interface

 

Compared to the previous STEVAL-MKI109D generation, some additional features are available:

Figure 4: STEVAL-MKI109DFigure 4: STEVAL-MKI109D

  • A STM32H5 MCU controls the board. 
  • A USB Type-C® cable establishes a connection to the PC.

Figure 5: Connecting STEVAL-MKI109D to the PC through a USB type C cableFigure 5: Connecting STEVAL-MKI109D to the PC through a USB type C cable

 

 

  • STEVAL-MKI109D now supports I3C in addition to I²C, SPI, and TDM.
  • An SD card slot is available on the back side of the board.

Figure 6: An SD-card slot is available on STEVAL-MKI109DFigure 6: An SD-card slot is available on STEVAL-MKI109D

 

  • The board can be programmed with different tools like STM32CubeProgrammer or MEMS.

Exploring STEVAL-MKI109D with MEMS-Studio

Plug an ST MEMS DIL24 adapter board on the STEVAL-MKI109D, as shown in the following figure. You can choose one among the large portfolio of adapters which ST offers for every sensor in production.
For example, here we use the STEVAL-MKI227KA DIL24 adapter board with the LSM6DSV16X. 

 

Figure 7: STEVAL-MKI227KA with LSM6DSV16X  plugged on STEVAL-MKI109DFigure 7: STEVAL-MKI227KA with LSM6DSV16X  plugged on STEVAL-MKI109D

Now MEMS-Studio and select STEVAL-MKI227KA (LSM6DSV16X) as the device name, shown in the picture below:

Figure 8: MEMS Studio - ConnectFigure 8: MEMS Studio - Connect

 

After selecting the device, click the start button to enable STEVAL-MKI109D to send data to the PC.

Figure 9: MEMS Studio - Sensor Evaluation, quick setupFigure 9: MEMS Studio - Sensor Evaluation, quick setup

 

You can see the sensor outputs as numerical data and plots in MEMS-Studio.

 

Figure 10: Data plotting in MEMS StudioFigure 10: Data plotting in MEMS Studio

Now, the following features are available:

  • Perform data logging.
    Figure 11: MEMS Studio - Sensor Evaluation, Save to FileFigure 11: MEMS Studio - Sensor Evaluation, Save to File

     

  • Analyze data in the time domain and in the frequency domain.

Figure 12: MEMS Studio - Data Analysis, Time DomainFigure 12: MEMS Studio - Data Analysis, Time Domain

 

 

Figure 13: MEMS Studio - Data Analysis, Frequency DomainFigure 13: MEMS Studio - Data Analysis, Frequency Domain

 

Figure 14: MEMS Studio - Data Analysis, SpectrogramFigure 14: MEMS Studio - Data Analysis, Spectrogram

 

Some of the advanced features available in MEMS-Studio for the new STEVAL-MKI109D are:

  • The possibility to evaluate the sensor fusion low power (SFLP).

Figure 15: Sensor Fusion Low Power (SFLP) with STEVAL-MKI109D, STEVAL-MKI227KA and MEMS StudioFigure 15: Sensor Fusion Low Power (SFLP) with STEVAL-MKI109D, STEVAL-MKI227KA and MEMS Studio

 

  • A programmable finite state machine (FSM), which can be debugged at real time.

Figure 16: MEMS Studio - Advanced Features, FSMFigure 16: MEMS Studio - Advanced Features, FSM

 

  • The machine learning core (MLC), enabling AI at the edge through decision tree based algorithms.

Figure 17: MEMS Studio - Advanced Features, MLCFigure 17: MEMS Studio - Advanced Features, MLC

 

  • The intelligent sensor processing unit, which allows to embed more advanced AI models such as a neural network in the MEMS sensor.
Figure 18: MEMS Studio - Advanced Features, ISPU Model Converter, NN modelFigure 18: MEMS Studio - Advanced Features, ISPU Model Converter, NN model

 


Figure 19: MEMS Studio - Advanced Features, ISPU Model Converter, Radar ChartFigure 19: MEMS Studio - Advanced Features, ISPU Model Converter, Radar Chart

Conclusion

With a STEVAL-MKI109D and the MEMS-Studio software tool, you can speed up the evaluation for your application.

Now, it’s your turn, choose your sensor and start to design a new breakthrough application!
You can find STEVAL-MKI109D and the MEMS adapter boards on our eStore.

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