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SLVUB68 – October 2017
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Copyright © 2017, Texas Instruments Incorporated
DRV8873x-Q1EVM User’s Guide
Figure 2. EVM Connections
2.3
LED Lights and Switch Functions
Two LED switches and one push-button switch are available on the DRV8873x-Q1EVM to notify the user
of different motor statuses and to control the operation of the motor. The STATUS LED will blink at a
regular interval to provide an indication the MSP430G2553 MCU is powered and code is running. The
nFAULT LED will light when the DRV8873-Q1 device detects an abnormal condition, such as overcurrent,
overtemperature, or open load.
The S1 switch is configured to reset the MSP430G2553 MCU. By moving the J2 jumper to the alternate
position, the switch can be used as a general-purpose input if user-supplied code is installed.
3
GUI Application
The GUI is used to control the DRV8873x-Q1EVM through USB commands. The commands are sent from
the computer to the FTDI FT233RL device, which converts USB commands to UART commands. The
UART commands are received by the MSP430G2553 MCU.
3.1
Installation
Follow these steps to install the GUI application:
Step 1.
Double click on the
Setup_DRV8873x-y.y.y_EVM.exe
file. The y.y.y values shown may
change as the GUI is updated.
Step 2.
Click the
Yes
button in the
User Account Control Window
to continue (see
Figure 3
).