SLUUB65B May 2015 – December 2022
The BQFS file provided with this document is based on the latest firmware revision for a given BQ275xx device and its default data flash configuration. A user can have one of two situations in a production environment:
Also, a tool is available that allows converting a senc file into a version that programs custom DFI from the beginning. It is necessary to have a DFI file to use this tool and an original senc file. A senc file is a file that actually is used to reprogram the firmware of a BQ275xx device by using the evaluation software. These files are input to the BQFS Update Tool and after executing creates a BQFS and DFFS file that contains the desired firmware with the data flash configuration specific to a user's application (Figure 19-6).
The user has the option to create a BQFS and DFFS based on I2C (default) or HDQ. The Update Tool is called from a command screen (DOS) by running the FlashStream.exe file. The command structured for the tool is displayed when calling the FlashStream.exe. The associated files used with the Update Tool must be within the same directory as the tool.
The Going to Production With the BQ2750x Application Report (SLUA449) describes how to create a DFI for the first time. The Updating Firmware With the BQ2750x and EVM Application Report (SLUA453) describes how to update a DFI that was created with an older version of firmware and now must have a DFI that is compatible with the later version firmware without requiring to go through the whole process described in SLUA449.