Texas Instruments bq76930 User Manual Download Page 15

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bq76940/bq76930/bq76920 Software

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