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3.5 OPTEVM Software Operation
This section primarily discusses how to operate the OPTEVM software. The GUI has a primary window that is
used to configure and read from the OPTEVM, along with two other windows that are used to access different
features of the OPTEVM. Basic GUI functionality and a description of the tabs are also presented in this section.
3.5.1 Getting Started
To quickly start using the device, click the Operation Select on the drop-down menu and select Continuous to
bring the device out of power-down mode. Then click Start Capture to begin data capture. The green LED on the
motherboard turns off. Lux data appears above the lux plot as shown. The plot also starts to populate with the
device lux readings.
If the GUI is not responsive, then check the other Latte scripts window, which is minimized by default. If the
message Operation I2C Register Read for command [REGRx01] Failed. is displayed, then this means that the
light sensor IC or the OPTCB board is not detected by the motherboard. Verify the OPTCB board is plugged in
and properly oriented.
3.5.2 Feature Descriptions
3.5.2.1 Lux Plot
For all single channel EVMs (non-color EVMs), the device outputs a single value (for example, a lux reading
indicating the ambient light level). In the center of the GUI window, there is a plot showing the lux reading from
the device on the y-axis and the sample number on the x-axis. The plot settings can be tweaked by right clicking
on the plot. The x-axis and y-axis options under the right-click menu allow the range of x and y-axes displayed to
be changed. There is also an auto option that dynamically changes the range to match the data. Scrolling zooms
in to or zooms out from the plot. Left-clicking and dragging displays a yellow rectangle that, upon releasing
SBOU293B – NOVEMBER 2022 – REVISED JULY 2023
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Figure 3-13. GUI Capture Running (single channel)
Copyright © 2023 Texas Instruments Incorporated
OPTEVM Software
Light Sensor Evaluation Modules
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