Open.MEMS

What is Open.MEMS? 2

Open.MEMS licensing program is born to offer to our customers an easy way to evaluate,

program and play with sensors, speeding up production development and shortening time-to-

development.

To encourage broad use of its MEMS and sensors to all the customers and open-

community developers, the program makes freely available to Open.MEMS licensees drivers,

middleware, and application software, beginning with sensor fusion for 3-axis accelerometer,

3-axis gyroscope, and 3-axis magnetometer, considered vital for many portable and wearable

applications. ST anticipates continuing expansion of the Open.MEMS program with additional

and complementary software libraries, including, for example, blocks for pedometers, tilted

compasses, gesture-recognition, activity monitoring and pedestrian dead reckoning.

The Open.MEMS program is supported by ST’s STM32 Open Development platform, an

open, affordable, and extensible platform for product prototyping and development based on

ST’s industry-leading STM32 ARM® Cortex®-M processor-core microcontrollers and

integrating a wide range of other ST components for various sense, control, connectivity, and

other functions.

After acquiring an STM32 Nucleo development board, developers only need to download

and install STM32Cube development tools, STM32 Nucleo expansion software and additional

value-libraries. Once they have agreed to an online, click-through license agreement, they will

quickly receive a unique key for their STM32 Nucleo development board. Copying the key into

the software will automatically unlock all APIs (application programming interfaces) in each ST

value-library, and in as little as 5 minutes, they can be working on their prototype.

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STM32 Nucleo expansion boards

Open.MEMS web siteopen.MEMS web site address: www.st.com/openmems

MEMS Sensors Expansion boardfor STM32 Nucleo

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X-NUCLEO-IKS01A1

The X-NUCLEO-IKS01A1 is a MEMS inertial and

environmental sensor evaluation board system.

It is compatible with the Arduino UNO R3 connector

layout, and is designed around STMicroelectronics’

LSM6DS0 3-axis accelerometer + 3-axis gyroscope,

the LIS3MDL 3-axis magnetometer, the HTS221

humidity sensor and the LPS25HB pressure sensor.

Key Features

• LSM6DS0: MEMS 3D accelerometer (±2/±4/±8 g) + 3D

gyroscope (±245/±500/±2000 dps)

• LIS3MDL: MEMS 3D magnetometer (±4/ ±8/ ±12/ 16 gauss)

• LPS25HB: MEMS pressure sensor, 260-1260 hPa absolute

digital output barometer

• HTS221: capacitive digital relative humidity and temperature

• DIL 24-pin socket available for additional MEMS adapters and

other sensors

• Free comprehensive development firmware library and

example for all sensors compatible with STM32Cube firmware

Open.MEMS in 5 stepsStart coding your ideas in just few minutes

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Installer

Download X-CUBE_MEMS2www.st.com/openmems

www.st.com

License request

License activation

Start developing

IAR v7.xx(demo project included)

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X-CUBE-MEMS2

After receive the license authorization email,

replace the osx-mfx-license values with the new one

(osx_license.h）

Connect the Nucleo board to PC with USB，Then fill and mail the form for license request.

Open MotionFX demo project

How to download code (1)

• Method 1: using IAR to download as the following picture

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Step 2: select download file

Step 1: select Project → Download → Download file

Step 1

Step 3: restart Nucleo board

How to download code (2)• Method 2: use Nucleo drive to download as the following picture

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Step 2: drag and drop on your Nucleo drive

Step 1: select Download file (.bin file) from your IAR projects.

Step 3: restart the Nucleo board

How to demonstrate Sensor Fusion GUI 8

① A STLink Virtual COM Port will be display under device manager when the Nucleo boardconnects to PC.

② Open the Sensor Fusion GUI, customer may select

the display type for Sensor Data or Fusion Data.

Sensor Data Fusion Data

MotionFX Package 9

MotionFX Fusion fuction

osx_MotionFX_initialize() Initialize the sensor fusion engine

osx_MotionFX_getKnobs() Get the knobs from the library

osx_MotionFX_setKnobs() Set the knobs from the library

osx_MotionFX_enable_6X() Enable/disable the 6X algorithm (A+G)

osx_MotionFX_enable_9X() Enable/disable the 9X algorithm (A+G+M)

osx_MotionFX_get_status_6X() Get the status of the 6X algorithm (A+G)

osx_MotionFX_get_status_9X() Get the status of the 9X algorithm(A+G+M)

osx_MotionFX_setGbias() Set the Gyro bias in the lib

osx_MotionFX_getGbias() Get the Gyro bias from the lib

osx_MotionFX_update() Run the Kalman filter update

osx_MotionFX_propagate() Run the Kalman filter propagate

osx_MotionFX_getLibVersion() Get the lib versionCompass calibration function

osx_MotionFX_compass_Init() Initialize the compass calibration lib

osx_MotionFX_compass_SaveAcc() Set the acc data into the lib

osx_MotionFX_compass_SaveMag() Set the mag data into the lib

osx_MotionFX_compass_Run() Run the calibration algorithm

osx_MotionFX_compass_isCalibrated() Check if calibration is needed

osx_MotionFX_compass_ForceReCalibration() Force new Recalibration

osx_MotionFX_compass_getCalibrationData() Get Calibration Data

osx_MotionFX_compass_SetCalibrationData() Set Calibration Data

MotionFX uses advanced algorithms to

integrate outputs from multiple MEMS

sensors cleverly and independently of

environmental conditions, for maximum

performance. Real-time motion-sensor data

fusion is set to significantly improve the user

experience, increasing accuracy, resolution,

stability and response time in advanced

motion-based applications in consumer,

computer, industrial and medical fields.

MotionFX will include library and application

code for the 3 IDE (Kei, IAR, Atollic).

MotionFX can be combined with ST's

MotionFX inertial modules to create

the industry's first complete and

customizable hardware/software

multi-axis MEMS sensor solutions for

enhanced motion and accurate

heading recognition.

Usage restriction for MotionFX lib

The library works only on the NUCLEO-F401RE board at present, in

future it could also apply to different STM32 product families.

The lib is node-locked to the specific NUCLEO-F401RE board once

the license activated.

The production library needs LUA to apply.

This lib cannot used for Android OS, Smartphone lib, need LUA here

is need lib.

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