EK3LV02DQ Evaluation kit
Contents
1. 29 2 32 UM0382 Contents 9 Bill Of Material ees 30 10 Revision history 31 S 7 0 List of tables UM0382 List of tables Table 1 ACOUISIUON command aad dn ceat acid dc 26 Table 2 Configuration Command llle eer 27 Table 3 Data Field T 60nligulr tloft aired boca 40 Rd Re E EU RUE eee Re CE ed bas 27 Table 4 sequi MPTC 30 Table 5 Document revision history Gr UM0382 List of figures List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Evaluation board block 6 Top silk screen for EKSLVO2DQ kit 7 DOAK Na wacequ e visuri sasi NES oa aa auqa wm aaa oa ec 7 Software installation 8 NOUV ICON PTP rrr me 9 Driver installation through the device manager 9 USB driver installation with the Hardware Update Wizard2. 10 Virtual COM driver port 5510 11 Graphical User Interface main window 12 Registers Read Write 13 Demo Mode window ce hrs 14 Threshold definition 15 Single Data 5 15 Continuos Data Acquisition 16 Plot Data and Show Data windoWS 16 BoardaAxis DCMNNION suuni d Bore dog i eon au tam dede otek eae RAS E ess 17 Bar ONA saman mus aa S qa w aaa ga amu S naa ea nasa Z Pa 18 IFICIMORACLE u uy s conga Saa Ge S eS Seis wae eae aaa 18 I 18 Miel PCT 19 Evaluation Kit Info and About window 20 EK3SEVO2DO Tile CUL u oua uem ee cites ae etre ee oe so s d Bee EE ad s 22 MEMS Pol ler DEMO usu ass aqa pass b ceases 23 AxiIS Orientali f oe eer ae Pee PON h Q Sana HEM Sa ee so haa 24 Schematic diagram for EKBGLVO2DQ board 29 5 32 Evaluation kit description UM0382 1 6 32 Evaluation kit description The EK3LV02DQ is a
3. Once the procedure has been completed the user can acquire plot and save the acceleration data measured by the sensor and he she can access the content of the registers embedded in the device Further details about each single function are provided in the sections hereafter Due to Virtual COM driver communication speed limits the maximum Output Data Rate allowed for the device is 640 Hz Higher Output Data Hate could result in a possible data loss Registers Read Write Through the Register Read Write panel Figure 9 ref3 the user can either directly write or read the registers value inside the LISSLVO2DQ device In particular by clicking on the Read Write button a new window appears Figure 10 To perform a register read out the user must select the desired register name into Reg Name pop up menu ref4 and then he she must click on the Read button ref2 The result of the reading will appear in the text box Reg Value ref3 To write a data into a register the user must select the desired register name ref4 choose the desired value in the text box Reg Value ref3 and then click on the Write button ref1 In case of read only registers the write button is not enabled Figure 10 Registers Read Write Registe Read wrte Y Dir Deteet A Read write Register Read Write Register Head wirite Name REGIT i H g b E We 13 32 Graphical User Interface
4. January 2007 UM0382 YZ User guide EK3LVO2DQ Evaluation Kit Introduction The EK3LV02DQ is an Evaluation Kit designed to provide to the user a complete ready to use platform for the evaluation of the LISSLV02DQ a low power 3 Axis linear accelerometer with digital output that includes a sensing element and an IC interface able to take information from the sensing element and to provide the measured signal to the external world Besides the MEMS sensor the evaluation board mounts an ST7 USB microcontroller which acts like a bridge between the sensor and the personal computer on which it is possible to run either a Graphical User Interface delivered with the kit itself or dedicated SW routines that implements customized applications This user manual describes the HW composing the evaluation kit and gives the informations required to install and to run the evaluation kit user interface For any detail about the features implemented by the LIS3LVO2DQ sensor refer to LIS3LV02DQ datasheet and to the Application Note AN2041 Rev 2 1 32 www st com Contents UM0382 Contents 1 Evaluation kit description 6 2 EK3LV02DQ GUI installation 8 2 1 PC system requirements 8 2 2 Software installation 8 2 3 Hardware installation 9 3 Graphical
5. ZI describe the lower part of the acceleration data on the X Y Z axes the SD Service Data gives to the user further information about the switches mounted on the board in detail bit 1 and bit 0 of the service data correspond to switches SW3 and SW2 on the Evaluation Kit board see EKSLVO2DQ User Guide ver 1 0 pdf Stop the stop command is used to interrupt the acquisition session SD the SD command activate a single data coming from LIS device The output string is the same of the start and F start command but the output string is sent just one time SV the SV command is used to retrieve the version of the firmware loaded onto the Evaluation Kit The output is an ASCII string looking like this eklvdq vx x x DI the DI command is used to retrieve informations about the MEMS device mounted on the Evaluation Kit Board The output is an ASCII string looking like this LISSLVO2DQ QFN 28 SZA UM0382 7 2 3 Supported commands Configuration Commands The Configuration class commands are described in the following table Table 2 Configuration Command Command Code Cmd Description w adr data xxx 77 adr data xxx write data byte into register adr W adr bit t f 57 adr bit t f write bit into the reg adr r adr xxx xxx 72 adr xxx xxx read data byte from register adr R adr bit t f 52 adr bit t f read bit 4 from reg adr S DF1 DF2 DF3 53 DF1
6. represented 2 the upper right corner of the window ref2 which allows to open and to close the communication port of the PC connected to the Evaluation Kit the right side which contains the Register Read Write and Direction Detection Demo ref3 Single Acquisition ref4 and About EK ref5 blocks 4 the bottom of the window which handles the continuous acquisition of the acceleration data and displays them inside the graphical panel ref6 Figure 9 Graphical User Interface main window Register Head wirite Dir Detect Reads rite About EK About About Continuos Acquisition Plot and Show Data Graphical use of Data Acquisition Control Plot Data START Show Data Bars i Setup q UM0382 3 1 Note 3 2 Graphical User Interface Connecting to Virtual the COM port Before using the functions of the Evaluation Kit Software it is necessary to open the connection with the EKSLVO2DQ board This is achieved through the following procedure 1 connect the EK3LVO2DO to desired USB port 2 inthe pop menu USB gt Virtual COM choose the Virtual COM number on which the board has been mapped For additional information on how to get this value check section 2 3 3 open the connection by clicking on Connect Figure 9 ref2 Once this procedure is completed the General Purpose LED of the board will switch from red to green
7. User Interface 12 3 1 Connecting to Virtual the COM port 13 3 2 Registers Read Write 13 3 3 Direction detection demo 14 3 4 Data ACGUISWION sas o si L Qua pub aspi eee eds 15 3 4 1 Single Acquisition mode 15 3 4 2 Continuos Acquisition mode 16 90 AU uut eee tees enon kna Zaa ORO s ku 19 4 Data acquisition quick start 21 5 EK Il 22 6 MEMS pointer as bce edad teow teers dade teen draco ee 23 6 1 GUI d escripti n 225254405645 qom ees e sd RUE om E RE cae bese tas 23 6 1 1 Right Side Main Controls 24 6 1 2 Left Side Pointer Application Controls 24 7 Supported commands 25 7 1 Getting Started 25 7 2 Commands Description 25 7 2 1 Supported Commands 25 7 2 2 Acquisition Commands 26 Configuration Commands 27 7 3 Main communication command 28 8 Schematic diagram
8. the position of a pointer on the screen of the PC More in details the SW provided with the kit itself allows to employ the board provided with the EK3LV02DQ Evaluation Kit as an inertial mouse where the tilt of the board is transformed into a movement of the pointer The board emulates also the left and right buttons of the mouse GUI description The GUI window see Figure 23 may be split up into two sections the right side contains the main controls to open the connection to the Evaluation Kit and to start stop the data acquisition whereas the left side is dedicated to the pointer application controls Figure 23 MEMS Pointer Demo MEMS Pointer Demo Ver 1 0 STMicroelectronics Pointer Infas USB gt Virtual COM Lett Fight Buttan Buttan or NM or A Fositian r Fosition BEME iio con A Deg r Deg TiltCantral Up Down Pointer speed 1 10 t E i MEU Application Lab 23 32 MEMS pointer 6 1 1 6 1 2 24 32 UM0382 Right Side Main Controls The buttons present on the right side of the GUI and their related function are described hereafter Connection control selects the COM port on which the EK board is connected to Acquisition control starts and stops the acquisition Exit exits from the MEMS Pointer Demo application Left Side Pointer Application Controls The controls present on the left side of the GUI and their related function are the followin
9. 02DQ GUI 3 select the Virtual COM port and then click on the Connect button Figure 9 ref2 A select the destination file in which the acceleration data must be saved by clicking onto Setup Figure 14 ref1 and Destination File Figure 14 ref7 buttons 5 optionally select the desired decimation factor Horizontal and Vertical gain and then click on the OK button Figure 14 ref8 6 click on Plot Data or Show Data Figure 9 ref6 to activate the corresponding Data Display window Figure 15 7 click on Browsing button to activate the function of map browsing Figure 9 ref6 and then load the desired image by clicking on Load Image button 8 click on START STOP button to activate stop the collection of data from the sensor their saving onto file and plotting on the screen 9 toclose the application click on Disconnect and then click on Exit 21 32 EK lite 5 22 32 UM0382 EK lite The mini CD delivered with the 0200 contains also a lite version of the previous GUI together with its source code The source code can be found in the directory S Home STM EK3LV02DQ EK3LVDQ_lite where Home represents the directory in which the SW delivered with the evaluation kit has been installed C Program Files by default The intention is to provide to the user a guidance to the development of his her own customized application The evaluation kit is sta
10. Action View Window Help Browse with Paint Shop Pra 8 2 Computer Management Local 100687 Search 8 System Tools dX Computer 154 Event Viewer J Data Acquisition Devices Ya Manage 63 Shared Folders lt Disk drives Performance Logs and Alerts 3 Display adapters Map Network Drive DVD CD ROM drives aj Storage 3 Floppy disk controllers Removable Storage 43 Floppy disk drives Disk Defragmenter Disk Management dh Services and Applications Send Disconnect Network Drive T ae Keyboards Mice and oth q Cut Copy Create Shorkcut Delete Rename Properties Monitors B Network 4 Other devites ST MEMS UNIT Y Ports COM amp LPT 988 Processors Sound video and game controllers System devices Universal Serial Bus controllers 9 32 EKSLVO2DQ GUI installation Figure 7 Hardware Update Wizard Welcome to the Hardware Update Wizard This wizard helps you install software for ST MEMS UNIT If your hardware came with an installation CD lt j or floppy disk insert it now What do you want the wizard to do e he soft ly Recomme UM0382 USB driver installation with the Hardware Update Wizard Hardware Update Wizard Please choose your search and installation options Pea wes cy Search for the best driver in these locations Use the check boxes belo
11. DF2 DF3 special mode setting Write this command is used to write a byte inside an accelerometer register The address is identified by the byte adr while the data to be written is represented by the third field data WriteBit this command is used to write a single bit inside an accelerometer register at position bit The address is identified by the byte adr while the data to be written is represented by the third field t f true to set the bit high and false reset the bit where the two data are t 74 and f 66 Read read command allows to read the data present inside the LIS device register The adr value is the EK3LV02DQ register address that the customer desires to read The output string is composed by nine fields RV reg_data reg_adr with R and Vis the string with value 52 56 the reg data is the register content and reg_adris its address The other five fields can be considered care ReadBit read command allows to read the data present inside the EKSLVO2DQ device register The adr value is the LIS register address of the register that the customer desires to read The output string is composed by bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit O where bit 0 bit 7 are the eight bit contained in the register with address given by reg adr Set this command allows the user able to change some settings of the firmware of the Evaluation Kit DF1 Data Field1 is used to ident
12. NTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2007 STMicroelectronics All rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States of America www st com q 32 32
13. Q evaluation kit is implemented upon USB ver 2 0 Supported Commands The commands supported by the EKSLVO2DQ FW are divided into two different classes Acquisition commands Configuration commands 25 32 Supported commands UM0382 7 2 2 26 32 Each command sent to the Evaluation Kit is composed of four fields Before and between the different field it is located a fixed code ek ASCII 65hex the whole string is reported below The OpCode Operative code field defines the command given to the evaluation kit while DF1 DF2 and DF3 defines the commands attribute the fixed field is used as a trigger for the communication In the next paragraphs will be explained only the OpCode and DF Acquisition Commands The commands belonging to the Acquisition class commands are described in the following table Table 1 Acquisition command Cmd Code Cmd name Description _ O SMS _ Start the start command is used to start data acquisition When the start command is sent the board returns the acceleration data measured by the LISSLVO2DQ device In particular the output string is composed of eight bytes s t Xh XI Yh YI Zh ZI SD The first two bytes s and t are always the hexadecimal values 73 74 while Xh Yh Zh represent the upper part of the acceleration data on the X Y Z axes and XP YI
14. UM0382 3 3 14 32 Direction detection demo The LISSLVO2DO allows the implementation of motion controlled functions such as gaming and terminal control while requiring reduced computational power to the application controller The device in fact may be programmed to generate an interrupt signal when a tilt is detected and to return the information of the direction in which the sensor has been tilted With the same feature the LISS3LVO2DQ sensor is able to return the information about the spatial orientation of the board without requiring the reading and the further post processing of the acceleration data This feature is demonstrated through the Direction Detection demo mode panel Figure 1 1 which is activated by clicking on the Dir Detect button present in the main GUI window Figure 11 EK Demo Mode window Register Head wirite HghPazzFite Esternal Thieshod BE 450 mg pats coel amp 2 H EN Slat Dracton Detection Ceure 7 In order to configure the event which will trigger the interrupt event the user must select the desired inner internal and outer external threshold ref1 defining in this way an hysteresis region that allows to avoid false detections and or bouncing produced for example by either spurious vibration or tremor Whenever the inner thresholds is greater than the outer one the hysteresis region will be null and the threshold employed to detect the tilt direction will be the o
15. aid panels it is necessary to push onto the START STOP button Figure 14 ref2 Figure 14 Continuos Data Acquisition Control Acquisition Setup Decimation Factor Output bandwidth ODA FullScale mode 2G FULLSCALE Acquisition Control Tristate mode 3state OFF Graphics Amplification 4 Horizontal Vertical Destination File During a Continuous Acquisition Mode the user can watch the data coming from the EK3LV02D0Q in different graphical windows The windows corresponding to Plot Data and Show Data are shown in Figure 15 Figure 15 Plot Data and Show Data windows Conbinucs Acquisition T Plot and Show Data Jata tupe Q ADC Data rosis mg Data Show Data Angle Data The sign of the acceleration measured by the sensor is related to the axis definition given in Figure 16 b The computational power of the PC on which the GUI is running may affect the maximum number of windows that can be opened at the same time Gr UM0382 Graphical User Interface Figure 16 Board Axis Definition USB CONNECTOR Clicking on the Setup button Figure 14 the Acquisition Setup window will open This window allows to program the output data rate of the LISSLVO2DQ device By default it is set to 40Hz corresponding to a signal bandwidth 3dB of 10Hz to modify this parameter the user has to select the desired value from the related pop up menu Figure 14 r
16. dedicated driver which is delivered onto the CD accompanying the kit itself together with a GUI interface which allows a simple interaction with the sensor itself The steps that must be followed to install the driver and the SW are described in the following section 2 2 q 7 32 EKSLVO2DQ GUI installation UM0382 2 2 1 2 2 8 32 EK3LV02DQ GUI installation The installation of Graphical User Interface GUI for the EK3LV02DQ implies two steps the installation onto the PC of the Software delivered with the evaluation kit the installation of the Virtual COM driver needed to use the Evaluation Kit board PC system requirements Both the hardware and software that compose the EKSLVO2DQ Evaluation Software Kit have been designed to operate with Microsoft amp Windows XP Microsoft NET Framework 1 1 or higher this software can be downloaded for free from the Microsoft web site 2 The installation of the Microsoft NET Framework is not required when running on windows XP SP2 or higher Software installation To install the SW distributed along with the EKSLVO2DQ evaluation kit 1 insert the MiniCD delivered with the Kit inside the CD ROM drive 2 if the Autorun screen does not appear click on Start gt Run enter D Autorun exe and click OK D represents the letter of your CD ROM drive 3 click onto Evaluation Kit SW Installation from the EKSLVO2DQ Evaluation Kit page which ap
17. driver Figure 8 The knowledge of this number is required to run the EKSLVO2DQ Evaluation Software GUI For additional details check section 3 f 10 32 UM0382 q EK3LV02DQ GUI installation Virtual COM driver port assignment c Computer Management Figure 8 E File Action View window Help 2 System Tools EH 4 Event Viewer ps RI an Performance Logs and Alerts E Device Manager T Storage Removable Storage 2 Disk Defragmenter Disk Management Fl E Computer rue Disk drives E E Display adapters 82 DVD CD ROM drives du Floppy disk controllers IDE ATA ATAPI controllers e Keyboards Mice and other painting devices Monitors Network adapters EY Ports COM amp LPT EE Communications is COM1 x 5 ST Virtual am 8 a Smart Cad readers F Sound video and game controllers H Storage volumes E System devices E Universal Serial Bus controllers 11 32 Graphical User Interface UM0382 3 12 32 Graphical User Interface To execute the 0200 Evaluation Software Graphical User Interface 1 click on Start gt All Programs 2 Select the folder EK3LV02DQ gt Executables 3 launch the program EK3LV02DQ Ver 1 0 With these operations the GUI main window will appear Figure 9 the window is composed of four main sections as detailed below 1 the graphical panel ref1 where the data coming from the sensor are graphically
18. efs The Acquisition Setup window allows to change also the device Full Scale Figure 14 ref4 and to put in tri state mode the SPI serial interface lines of the microcontroller Figure 14 ref5 The latter feature has been implemented to guarantee to advanced users the full control of the MEMS lines through a different source i e from a separate controller The section related to Graphics Amplification Figure 14 ref6 allows to zoom the data plotted on the screen Please notice that the horizontal and vertical gains do not change the resolution of the device they only impact the way in which data are shown on the screen Last but not least the Acquisition Setup window allows the user to select the file where the acquired data values have to be stored Figure 14 ref7 In particular the file in which the data are saved reports the informations about each acquisition session and contains the acquired samples in three different fields In order to apply the settings defined with the Acquisition Setup window it is necessary to push on the OK button Figure 14 ref8 These settings will be used for any subsequent acquisition until their next modification and can not be changed while the acquisition is running The main panel of the GUI allows also to plot the acceleration data in three ways Figure 9 ref6 17 32 Graphical User Interface UM0382 1 asa Bar Chart Figure 17 Figure 17 Bar Char
19. ended to help the user to understand how to handle the communication with the board and not to acquire to set and to manipulate data UM0382 Schematic diagram 8 Schematic diagram The schematic diagram of the EKSLVO2DQ evaluation kit is shown in Figure 25 Figure 25 Schematic diagram for EK3LVO2DQ board 58 gt go lt i ST7265X TQFP64 U2 6 1599105 dS99l E BOW ony m LN IV Vd JPPA Nagsn EK 319 221 c 99976 VY dni popes epp 2190285 ped 55 OZ 29 32 Bill Of Material UM0382 9 Bill Of Material The Bill of Material for the 0200 evaluation kit is given in Table 4 Table 4 Bill Of Material ae _ m re 095 _ 30 32 Ayr UM0382 Revision history 10 Revision history Table 5 Document revision history 2 2007 Initial release 26 Jan 2007 2 The document now contains User Manual the Command Description the Schematic and the BOM 31 32 q UM0382 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products are sold pursuant to ST s terms and conditions of sale Purchasers are s
20. gs Left Button Right Buttons inform on whether the left right button present on the Evaluation Kit is pressed X Y Position shows the actual x y coordinates of the mouse pointer on the PC Screen X Y Deg shows the tilt of the Evaluation Kit along the X and Y directions which are defined as depicted in Figure 24 Tilt Control allows to select the direction of the vertical displacement on the screen Vs the direction in which the board is tilted In particular by selecting UP the pointer will move upward by forward tilting the Evaluation Kit Vice versa by selecting DOWN the pointer will move downwards whenever the board is tilted backward Pointer Speed sets the sensitivity of the pointer to the inclination of the board Figure 24 Axis Orientation py 1 ne a s ps e mi pem pos i q UM0382 7 7 1 7 2 7 2 1 Supported commands Supported commands The EK3LV02DQ board is equipped with a dedicated firmware which supports a set of commands that allow to control the 3 axis digital output MEMS sensor mounted on the board and to acquire the measured acceleration data The firmware handles also the communication between the EK board and the PC through the USB bus Through the usage of these commands it is possible to control the 3 axis digital output MEMS sensor mounted on the board and to acquire the measured acceleration data thus a
21. ify which feature the user wants to change DF2 Data Field 2 and DF3 Data Field 3 contains the new data value to associate to the function specified by DF1 In particular DF1 is composed by the following configuration Data Field 1 configuration Cfg Code Cfg Cmd Description 27 32 Supported commands UM0382 7 3 Note 28 32 Main communication commands This section shows the basic sequence of commands to start a data communication session and to retrieve the acceleration data from Evaluation kit The first step is to connect the board and to bring the microcontroller out from 3 state mode ek S ek A ek 0 ek 0 ASCII gt 65 68 53 65 68 41 65 68 30 65 68 30 Hex with these two command user can start the single data acquire session ek O ek o ek u ek a ASCII gt 65 68 4F 65 68 6F 65 68 75 65 68 61 Hex or continue data acquisition ek O ek o ek n ek n ASCII gt 65 68 4F 65 68 6F 65 68 6E 65 68 6E Hex the command to stop the acquire session is ek O ek o ek f ek f ASCII gt 65 68 4F 65 68 65 68 66 65 68 66 Hex In the same way the user can retrieve informations from the Evaluation Kit such as the version of the Firmware loaded onto the microcontroller The commands supported by the Evaluation Kit are intended for the usage with a dedicated SW written by the user and running on PC The method described above involving the usage of the hyper terminal is only int
22. llowing the user to easy write his her own applications which exploit the mounted accelerometer This section describes the commands that are supported by the firmware loaded onto the microcontroller of the EKSLVO2DQ Evaluation Kit Getting Started Before using the commands described in the next paragraphs the following procedure must be performed 1 connect the EK3LVO2DO to the USB port 2 start an appropriate software which allows to send the command through the Virtual serial port The remaining part of this document will suppose the usage of the Hyper Terminal 3 create a new connection for example name it EK3LV02DQ and click 4 inthe Connect Using field select the right Virtual COM port onto which the USB port has been mapped 5 set the port to 11500 Bit per second 8 Data bits Parity None 1 Stop bit Flow control None and then click OK Once this procedure has been completed the user can send to the EKSLVO2DOQ the commands described in the following sections by typing the commands themselves in the Hyper Terminal window Commands Description The EK3LV02DQ board is equipped with eklvdq ver1 0 0 firmware This firmware supports a set of commands which allow to control the 3 axis digital output MEMS sensor mounted on the board and to acquire the measured acceleration data The firmware handles also the communication between the EK board and the PC In particular the communication of the EKSLVO2D
23. n Evaluation Kit designed to provide the user with a complete ready to use platform for the evaluation of the LISSLV02DQ a low power 3 Axis linear accelerometer with digital output The block diagram of the evaluation kit is given in Figure 1 Figure 1 Evaluation board block diagram Control Switches Left Right and Reset USB qp 9772651 USB uC Connector Power On LED Data Ready LED General Purpose LED Besides the MEMS sensor the evaluation board mounts an ST7 USB microcontroller which acts like a bridge between the sensor and the personal computer on which it is possible to run either a Graphical User Interface delivered with the kit itself or dedicated SW routines that implements customized applications Few switches and LED indicators are also present to control and to monitor the functionality of the board itself The top silk screen of the board and the photo of the full board are shown respectively in Figure 2 and in Figure 3 UM0382 Evaluation kit description Figure 2 silk screen for EK3LV02DQ kit JO k MBU Application Lab EK3LV02DQ T m lRiccseli L _ Rrsti n D T ju 0530200 L3 Re j Figure 3 Board photograph re E L ap ug L2 p MEL a Pp Pa LS aule aj u E In order to operate the EKSLVO2DOQ evaluation kit it is required the installation of a
24. olely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONME
25. os Acquisition mode Figure 9 ref6 3 4 1 Single Acquisition mode The Single Acquisition mode panel allows the user to perform the measurement of the acceleration acting on all the three axes A single read of the acceleration data measured by the device is done by clicking on the Acquisition button Figure 13 ref1 This panel allows also to activate and to disable the Self Test function of the device using the two radio buttons Self Test ON and Self Test OFF Figure 13 ref2 Whenever the self test is activated the proof mass of the sensor is electrostatically deflected and the acceleration data measured by the sensor will exhibit a change in their DC level as specified on the datasheet of the part This function allows to check whether the sensor is working properly without requiring any mechanical movement of the board mounting the sensor itself Figure 13 Single Data Acquisition Single Acquistion Single Acquisistion Single Acquisition SefTestON E Sel Test OFF out Acquisition out mmm out Z mg 15 32 Graphical User Interface UM0382 3 4 2 Continuos Acquisition mode The section related to Continuos Acquisition allows the user to perform a sequence of acquisitions to plot and to save the acquired acceleration data under different formats In order to start and to stop the data acquisition and to activate the plotting of data in the afore s
26. pears 4 follow the instructions given by the Installer Figure 4 Figure 4 Software installation ie Setup EK3LV20DQ Evaluation Kit Select Components Which components should be installed Select the components you want to install clear the components you do want to install Click Nest when are ready to continue Full installatian v EKSLV 2000 Lite 1 0 gt MEMS Pointer Ver 1 0 EK3LVDL Lite source code ie ST Firmware v Virtual COM Driver v EK3LV20DD User Manual LISSLY02D0 Datasheet v LISSLVO2D0 Application Note 2381 _ Current selection requires at least 3 7 MB of disk space a http Awww microsoft com downloads and search for Net framework Redistributable Package q UM0382 EK3LV02DQ GUI installation 2 3 Hardware installation To install the virtual COM driver insert the Evaluation Kit board into a free USB port look at the Notify icon Figure 5 and than wait for Hardware Update Wizard Figure 5 Notify icon J Found New Hardware x ST MEMS UNIT CAM If the Hardware Update Wizard appears as shown in Figure 7 then follow the instructions given in Figure 7 otherwise follow the instructions indicated in Figure 6 and Figure 7 Figure 6 Driver installation through the device manager Right click on My Computer Right click on ST MEMS UNIT and choose for Update driver d EK j L3 Computer Management im File
27. rted by launching the executable EK3LV02DQ Lite which is contained in the EK3LV02DQ gt Executables folder The graphical aspect of the GUI associated to the application is shown in Figure 22 Figure 22 EKSLVO2DO Lite GUI 7 EK3LVO2DL lite aag Acquisition Setup USB gt Virtual UDA Read Write START Destination File OK Plot Data OK In order to operate the SW it is suggested to follow these instructions 1 connect the EK3LV02DQ to the USB port 2 start the GUI for EK3LV02DQ Lite 3 select the Virtual COM port and then click on the Connect button 4 optionally select the destination file in which the acceleration data must be saved by clicking onto Setup and Destination File buttons click on Plot Data to activate the corresponding Data Display window 6 click on START STOP button to activate stop the collection of data from the sensor their saving onto file and plotting on the screen 7 close the application click on Disconnect and then click on Exit The GUI allows also the Read Write the registers embedded in the LISSLVO2DQ device mounted on the board and to perform a single read of the acceleration data measured by sensor e SZA UM0382 6 6 1 MEMS pointer MEMS pointer This section describes the usage of a simple pointer application which employes the acceleration data provided by the LISSLVO2DQ MEMS 3 linear accelerometer to control
28. t EKSLVO2DL Evaluation Sofiware Yer 1 0 ppe AY lt laclirometer and Bars Grarhizel use of Data Acquisition Control jon p Flo Cala Inclinom Browsing SFow Date tais Load Image 2 asInclinometers Figure 18 where the inclination is related to the axes definition given in Figure 19 Figure 18 Inclinometer EK3LYO2DL Evaluation Sofiware Yer 1 0 ey ays STMicroelectronics X INCLINATION Y INCLINATION Z INCLINATION laclirometer and Bars Graphizel use of Data Acquisition Control Inclinom Browsing ETSP als Load Image horizontal plane q 18 32 UM0382 Graphical User Interface to navigate through a map Map Browsing Figure 20 The image to be shown is selected through the Load Image button A map stored inside the file mapa mundi jpg is provided as an example Figure 20 Map Browsing EKSLVO2DL Evaluation Yer 1 0 ays STMicroelectronics Contnuos Acquisti Plat and Show D ata laclirometer and Bars Graphizel use of Data Acquisition Control TE Flo Cala um Inclinom E Date tais 3 5 About EK Clicking on the About EK button located into the About EK section Figure 9 ref5 it is possible to obtain informations about the version of the GUI about the firmware running on the Evaluation Kit and about the version MEMS accelerometer mounted onto the board These information are retrieved by using the bu
29. ttons Mounted Device and Software Version which are shown in Evaluation Kit Info window Figure 21 Once the information about the device are displayed on the screen it is possible to get an explanation of their meaning by moving the mouse over the different parts of the device name LIS 3LV 02 DQ Please notice that if the connection is not working properly an error message will be shown This feature allows to test the connection between the board and the host computer q 19 32 Graphical User Interface UM0382 Figure 21 Evaluation Kit Info and About window About Evaluation Info About Tet aaah re apn teed ca ein 3 About MBU_info MEMS Evaluation Kit The EK3LY02D0 Software interface will help you in evaluating the LISSLV02DQ SFI I2C digital output 3 axis MEMS accelerometers EK3LVU2DO Evaluation Software 1 0 MBU Application Lab Oct 2005 RR The second button About of the About EK section Figure 9 ref5 opens the MBU info window which shows general informations about the software and provides the user with a direct link to the ST MEMS page q 20 32 UM0382 4 Data acquisition quick start Data acquisition quick start This section describes the basic steps that have to be performed to acquire the acceleration data from the EK3LV02DQ 1 connect the EK3L02DL to the USB port 2 start the EK3LV
30. uter one A graphical representation of the internal and external thresholds is given in Figure 12 Whenever the absolute value of the acceleration signal measured by the sensor either exceeds the outer threshold or returns below the inner threshold an interrupt signal will be generated and the General Purpose green LED will blink If the user wants to detect the orientation changes removing the DC level of the acceleration signal applied to the device i e removing the gravity vector it is possible to enable the High Pass Filter embedded inside the device by acting on the High Pass Filter pop up menu Figure 11 ref2 The cut off frequency of the filter which is shown inside the Cutoff Frequency text box ref5 is user selectable acting on the High Pass coefficients ref3 and on the Output Data Rate ODR For further details please refer to AN2041 To start the Direction Detection demo mode click on Start Direction Detection ref4 SZA UM0382 Graphical User Interface Figure 12 Threshold definition Full Scale X Y Z high External Threshold DD_THSE Hysteresis Region Positive Internal Threshold DD THSI acceleration XNY Zpreset Internal Threshold DD THSI Hysteresis Region bd ir pas External Threshold DD_THSE X Y Z low mnnn ull Scale 3 4 Data Acquisition The Data Acquisition panel is split in two sections 1 Single Acquisition mode Figure 9 ref4 2 Continu
31. w to limit or expand the default search which includes local paths and removable media The best driver found will be installed Search removable media floppy CD ROM V Include this location in the search EProgram Files S TMSEK3LY02D Q driver C Don t search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarantee that the driver you choose will be the best match for your hardware Hardware Update Wizard Please wait while the wizard installs the software E ST Virtual Com Ss Setting a system restore point and backing up old files in case your system needs to be restored in the future Hardware Update Wizard Completing the Hardware Update Wizard The wizard has finished installing the software for E ST Virtual Com 7 Click Finish to close the wizard lt Back lt Back Next gt Hardware Installation The software you are installing for this hardware 6 ST Virtual Com has not passed Wifidows Logo testing to verify its compatibility hy thi ZTA 1 me why this testing is important allation of this software may impair or destabilize the Wyrect operation of your system either immediately in the future Microsoft strongly top this installation now and dor for software that has ting Once the installation has finished a COM port number will be assigned to the ST Virtual Com
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