5 EVM GUI Operation
5.1 Hardware Setup
Follow these steps to setup the EVM prior to launching the GUI:
1. It is advised to make any jumper configuration changes prior to powering the EVM. The hardware device
variant will latch MODE, SLEW RATE and DIAG jumper settings after power-up and/ or coming out of sleep
(ITRIP takes effect immediately, however).
For the SPI device variant, it is still advised to make your IPROPI selection prior to powering the EVM.
2. Connect micro-USB cable to J6 (
). The digital portion of the EVM will become active. LEDs D6 and
D7 will illuminate. The nFAULT LED D2 may blink at a fast rate to indicate the absence of VM power supply.
For proper GUI application operation it is important to connect the EVM USB cable to a computer prior to
apBAT power to the EVM. For standalone EVM testing a USB connection is not necessary.
3. With the +BAT external supply outputs disabled, cBAT supply to the screw terminals on the EVM
(J14), observing polarity (
).
4. Energize the +BAT supply. VM LED D3 will illuminate. If VM LED does not illuminate, verify polarity and
check fuse(s) are installed and have continuity. Power consumption will be on the order of 10mA @ +12VDC
input. Significantly higher or lower may indicate a hardware problem if the fuse and supply polarity are
correct.
5. The EVM is ready to be used with the GUI application (
). In certain situations, such as while
disconnecting and reconnecting VM power before the power supply capacitors are fully discharged a proper
firmware reset may not happen. A proper reset is indicated by the STATUS LED D1 blinking at a rate of
approximately 1 Hz for the SPI variant EVMs and approximately 0.1 Hz for the HW variant EVMs. If the
Status LED is not blinking as expected, press the reset push button once with jumper J1 installed in the RST
position. Do not unplug the USB cable while the VM power is active. If you do, switch off the VM power, wait
until it is fully discharged and proceed to step 2.
6. The latest version of the GUI application is bundled with the latest version of the EVM firmware. It is
recommended to do a firmware update before selecting and connecting to an EVM variant using the GUI
application. The firmware update procedure is described in the
5.2 Launching the DRV824x_DRV814x-Q1EVM GUI Application
Whether using the desktop or web version of the GUI, the user experience and steps covered below will be the
same. It is assumed the hardware setup steps in the previous section have already been completed.
1. Launch the GUI application
2. From the screen referenced in
, select the EVM variant connected using the icons on the right.
Note
The ‘S’ and ‘H’ part number decorators – these indicate either the SPI or Hardware variant of the
device.
EVM GUI Operation
14
DRV824x_DRV814x-Q1EVM User’s Guide
SLVUC46A – MARCH 2021 – REVISED JULY 2021
Copyright © 2021 Texas Instruments Incorporated