Datasheet

Table Of Contents

INA231EVM Software Overview

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5.3.4 Graph Tab

The Graph tab contains a plot window that shows the progression of data over time on the INA231. All

four variables at the bottom of the EVM software (V

BUS

, V

SHUNT

, Current, and Power) can be plotted using

the drop-down box directly above the graph. After the desired plot has been selected, toggle the

Continuously Poll Data button above the plot to begin polling for data. If the user desires to save the data

from the plot, simply select the USB Controls drop-down at the top of the page, then select the Start

Graph Log option. Once the Start Graph Log has been selected, the user is prompted to select a location

for the data and to name the file.

Figure 25. Graphing the INA231 Data

5.3.5 Auto-Write and the Supply Voltage

The INA231EVM software allows users to customize the board level voltage, regulated by the SM-USB-

DIG. By selecting either 3.3 V or 5 V, the user can designate which voltage the device should operate at.

The software also includes an Auto-Write feature as shown in Figure 26, which is enabled by default. This

feature automatically updates the register table whenever a change is made. When this feature is

enabled, the Write All Registers button serves little purpose and is only used as an alternative to when

AutWrite is disabled.

Figure 26. Auto-Write, Power Button, and Voltage Control

INA231EVM Evaluation Board and Software Tutorial SBOU128–February 2013

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