UM0285 datasheet(17/32 Pages) STMICROELECTRONICS

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UM0285

Graphical User Interface

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Figure 16.

Board Axis Definition

Clicking on the “Setup” button (Figure 14, ref1) the “Acquisition Setup” window will open.

This window allows to program the output datarate of the LIS3LV02DL 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, ref3).

The “Acquisition Setup” window allows to change also the device Full Scale (Figure 14, ref4)

and to put in tri-state mode the lines of the microcontroller SPI serial interface (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, ref5) 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 on 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):

USB CONNECTOR

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