Texas Instruments DRV8811EVM Menu, 3.2 DRV8811 GPIO Control Signals, Acknowledgement Text Box

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3.1Menu

The menu at the top of the application offers a series of quick options for how the COM port is to behave.

1.File → Exit - Terminates the application

2.Settings → Port - Selects from COM1 to COM4. Default is COM4.

The serial port's actual port number defaults to what we have specified on

“USB_Drivers_Install_Readme.pdf”. However, any port between COM 1 and COM 4 are equally usable.

3.Connect: Opens the serial port. When this menu item is pressed, its caption changes to “Disconnect”.

4.Disconnect: Closes the serial port. When this menu item is pressed, its caption changes to “Connect”.

After opening the application, the order of events should be:

1.Go to Settings → Port and choose the COM port where the USB virtual COM port device has been configured to work. If the COM port is 4, then this step can be skipped as application defaults to COM4.

2.Press Connect. If the port is available, the menu changes the “Connect“ caption to “Disconnect“. Press Disconnect to disable the serial communications.

<1><4><0> should return on the text box as an acknowledgement. The text box also changes from red to green, as shown in Figure 4.

Figure 4. Acknowledgement Text Box

The application is ready for use.

3.2DRV8811 GPIO Control Signals

Once the application is communicating with the interface board, the control signals can be actuated by checking or un-checking check boxes on the Signals frame.

Figure 5. Signals Frame

SLVA344A–July 2009–Revised September 2009 Laser and Motor Drives 9

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