Datasheet

Windows Application

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4 Windows Application

The DRV8844EVM Windows application is the software counterpart for the DRV8844 EVM allowing the

connection of a PC to the MSP430F2617 microcontroller though a USB interface chip. Once connection is

established and commands are sent, the microcontroller takes care of configuring control signals and

PWM generation.

The Graphical User Interface (GUI) is designed for testing all of the DRV8844 device’s functionality

without requiring hardware changes.

Figure 3 shows the DRV8844EVM.exe main screen.

Figure 3. DRV8844EVM.exe Main Screen

All the control signals needed to manage the power outputs enablement/disablement (ENx), power output

polarity selection (INx), device sleep mode (nSLEEP), and reset mode (nRESET) are made available

throughout pictographic pins at the Pin Control/Information frame. Sliders at the PWM control frame allow

for each respective output’s PWM duty cycle to be dynamically modified.

4.1 Menu

The menu at the top of the application offers a series of quick options for behavior of the COM port.

File: Exit – Terminates the Application

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

COMx: A series of available COM ports is shown. To determine which COM port is the VCP, view the

Windows' Device Manager and determine which one of the enumerated COM ports is using the FTDI

driver.

DRV8844 Evaluation Module SLVU762–August 2012

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