Texas Instruments bq76930 - Page 15

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Control registers can also be changed as register values by writing in the value box to the right of the
value box. Scan must be disabled to enter values. Register values may also be changed using the I2C
byte write tool at the top of the window. Register changes are visible if the Verify Writes option is enabled.
The display may also be updated using the Update Display button or selecting Scan.
The All Read/Write Registers section contains 4 buttons to the right of the register display:
• Update Display: This button reads all control and value registers and updates the values, bit breakout
fields and control features.
• Clear Faults: This button clears the status register.
• Save Configuration: This button allows saving the displayed values of the control register to a file. A
pop-up box allows selection of the file name. The default file location is C:\Users\<account-
name>\Documents\Texas Instruments\bq76940.
• Load configuration: This button allows loading the control register values from a file. A pop-up box
allows selection of the file, another pop up box lets you select whether to write the values to the
device. If faults are not set in the status register value in the file, they are not cleared by the write.
The Base Configuration section shown above the register detail provides convenient control of the
Coulomb Counter, ADC, and Temperature Sensor selection as functional controls without locating the
control bits.
The Data Scanning section allows periodic read of the device and display of the register values. The Scan
check box enables a periodic read when checked. The update interval is displayed and can be changed
with the Change Interval button.
The Logging section has the Start Logging button. The values read from the device can be saved to a
file. Selecting the Start Logging button opens a bq76940 Logging popup window to enter the file name,
comments and to select the data groups to be logged. The file name must be entered with the pop up
window's Browse button. The scan interval can be changed, and the logging is actually started in the pop
up window. When logging is active, the registers user interface cannot be used and the button changes to
Stop Logging. Selecting the button stops the logging. Scan is not necessary before logging, it will start
with logging and cannot be disabled during logging.
The Stack V/T/I section is on the right side of the Registers view (Figure 4). The ADC Gain and Offset
boxes show the values that are used for converting the register data into values. These value boxes are
read only, they are updated by the values read from the device with the Read Device button. The Display
raw data read from device below check box allows display of the hex register values rather than converted
values. The V/T/I values are updated by the Read Device button, the Update Display button, or the Scan
option.
4.4.5 I2C Pro View
The I2C Pro view of the GUI is shown in Figure 5. The I2C Pro view is useful to read or write several
sequential registers. If another view is displayed it can be selected using the I2C Pro button on the left
side of the window or from the menu. The I2C Command box for each section specifies the starting
register address for the transaction.
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SLVU925B–April 2014–Revised July 2014 bq76930 and bq76940 Evaluation Module User's Guide
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