UM0855 datasheet(16/35 Pages) STMICROELECTRONICS

16 / 35 page

Graphical user interface

UM0855

16/35

Doc ID 16617 Rev 1

The functions of the four main sections of the window are described below:

“Main control” (

Figure 9, ref 1) - connects/disconnects the board and starts acquisition

via the Start/Stop buttons.

“Saving” box (

Figure 9, ref 2) - allows the user to save the data to a specified text file,

choosing the data type to write. Data types available are:

LSB: the analog values measured by the 8-bit A/D converter of the microcontroller

are converted to 8-bit values, hence the 256 magnitude levels.

Angular rate: LSB data are multiplied by the sensitivity to obtain the angular rate,

expressed in deg/sec.

“Tab selector” (

Figure 9, ref 3) - used to toggle between the different features of the

demonstration kit.

“Legend” (

Figure 9, ref 4) - used to enable/disable viewing the axes.

“Details” (

Figure 9, ref 5) - shows information about the demonstration kit, such as the

name of the sensor, the version of the firmware loaded on the microcontroller and the

version of the PC software.

4.1

Connecting to the virtual COM port

Before using the functions of the demonstration kit software, the connection with the

STEVAL-MKI0xxV1 board must be opened using the following steps:

Connect the STEVAL-MKI0xxV1 to the desired USB port.

In the “Select COM” drop-down menu (

Figure 9 ref 1), choose the virtual COM number

to which the board has been mapped. For additional information on how to obtain this

number, see section

3.3. Otherwise, press “Find” to automatically get the correct COM

number.

Open the connection by clicking on “Connect” (

Figure 9 ref 1). Opening the connection

starts the board model recognition flow. If the flow terminates successfully, a

recognized board code and mounted device code is generated and written on the

“Home” tab. Otherwise, a message on the same tab alerts the user to check the board.

At this point, the user can acquire, plot and save the angular rate data measured by the

sensor and access the content of the registers embedded in the device.

If the “Find” button is pressed (

Figure 9 ref 1), the GUI attempts to automatically find the

COM number assigned to the demonstration kit, and displays it in the list box as a selected

item.

4.2

GUI main window functions

The following sections provide details regarding the functions of the tabs and buttons on the

GUI main window (see

Figure 9).

4.2.1

“Easy Start” button

When the “Easy Start” button is clicked (

Figure 9, ref 1), the GUI attempts to automatically

find the COM number assigned to the demonstration kit, to recognize the connected board

and its device and, if successful, starts the acquisition. If recognition is unsuccessful, a

message alerts the user to verify that the board type is in the list of managed ones, or to

update the SW.

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