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bqEASY™ Software
(d) On page 2H, when you click the "OK" button, the software asks you to write to the data-flash
memory. Click "Yes" for OK to write to the data flash.
Your Gas Gauge Module now has the data flash configured as you declared with all the information
entered in tab "2. Configure".
2. Simply install the Chemistry data using the bqEASY™ software, if the chemistry is a known chemistry
available in the bqEASY™ software:
(a) Open the current EV software, and click the bqEASY button in the left column of buttons below the
"Calibrate" button in the EV software.
(b) Click the "4. Chemistry" tab at the top row of bqEASY™ tabs. (Note: You can skip all tabs prior to
this.)
(c) Either select "Use Default Chemistry", or click "Enable Chemistry Selection," and select the correct
chemistry from the list.
(d) If you cannot find the proper chemistry, check the device EVM tool folder on the TI Web site for any
new bqChemistry file updates. These are updated more frequently than the EV software., Between
EV software updates, TI creates a self-extracting installer and posts it in the EVM tool folder for the
part being used. Install these updates if they are in the folder.
The software now configures all data-flash locations on Your Gas Gauge Module that deal with
chemistry functions. No other data-flash locations are modified.
10.4 Files
The bqEASY™ software uses four types of files to configure a fuel gauge.
1. .ENCR – These are default data-flash definition files found in the \bq_Evaluation_Software folder. The
.ENCR file is basically a copy of the entire data flash from a fresh gas gauge prior to any data-flash
updates either by the user or the gas gauge. They are unique for each version of each TI fuel gauge
product. If you are working with a new version fuel gauge and an older version of bqEASY™ software,
the correct file may not be present. This requires a new version of the EV software with bqEASY™
software. Navigate to the TI Web site in the EVM tool folder for the device being used, and download
the latest version, or contact TI. For the bqEASY™ program, the .ENCR files act mainly as a dictionary
to look up the address for a given data-flash location. For bqEVSW, they define screen parameters
including address, display formulas, and data type. An error message appears if the correct .ENCR file
cannot be found.
2. .CHEM (Chemistry Files) – These are read-only files found in the
..\bq_Evaluation_Software\Plugins\Chemistry folder of the application. When a new Li-Ion battery
chemistry is developed, a new Impedance Track™ model is required to define the chemical model.
During automated chemistry selection, each of these files is scanned in order to select the best match
with the recorded data. If you are working with a newly developed chemistry, it is possible that an
acceptable match may not be found. If this is the case, check for updated bqEASY™ software or
bqChemistry files on the TI Web site in the EVM tool folder for the part being used.
3. .DFI (Data-Flash Image Files) – These are binary images of the fuel gauge data flash with modified
values based on the application. Because of the binary format, it is quick and easy to transfer them to
and from a gauge. Each fuel gauge model and firmware version has a unique read-only .DFI which is
found in the ..\bq_Evaluation_Software\Plugins\Device_Defaults folder of the application. During the
bqEASY™ process, intermediate versions of .DFI files are recorded with current updated data in order
to prevent the possibility of corruption. Then, the final output of the bqEASY™ software is also a .DFI
file which is the 'golden image' that is programmed into each production unit. This output file is placed
in the ..\bq_Evaluation _Software\Plugins\Projects folder.
4. .EZY (bqEASY Project Files)– These are read-write text files which record header information
regarding a project, answers to the wizard questions, and status regarding the stage of completion (the
red check marks). They are kept in the ..\bq_Evaluation _Software\Plugins\Projects folder.
10.5 Completion Checkmarks
As the wizard questions and tasks are completed, completion checkmarks appear in two places – along
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SLUU426 – June 2010
bq27520EVM With System-Side, Single-Cell Impedance Track™ Technology
Copyright © 2010, Texas Instruments Incorporated