DRV8802-12-13-14
DRV8824-25
DRV8841-43
The Windows Application
3.1
The Menu
The menu at the top of the application offers a series of quick options for how the COM port is to behave.
File:
Exit – Terminates the application
Settings:
Port – Selects from COM1 to COM4. Default is COM4.
The serial port's actual port number defaults to what we have specified on the
“USB_Drivers_Install_Readme.pdf”. However, any port between COM 1 and COM 4 are equally usable.
Connect:
Opens the serial port. When this menu item is pressed, its caption changes to “Disconnect”.
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 FTDI 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.
3. <1><0><0> should return on the text box as an acknowledge. The text box also changes from red to
green.
4. The application is ready for use.
3.2
DRV88xx 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. Each tab will have a different set of control
signals as depending on the device being interface on. nSLEEP and nRESET control signals will be on all
tabs.
Functionality of control signals is identical across the platform. A checked checkbox translates to a HI level
on the respective control signal. Unchecked checkboxes translates to a LO level on the respective control
signals.
Figure 7. GPIO Control Signals
3.2.1
About DECAY
The DECAY pin is in reality a triple state input. The GPIO operates as HI and LO according to the
checkbox. To have the DECAY pin floating, engaging mixed decay mode, simply remove the decay
jumper JP3.
7
SLVU361B – April 2010 – Revised October 2013
CPG004_DRV88xx Evaluation Modules
Copyright © 2010–2013, Texas Instruments Incorporated