Other Parts Discussed in Thread: BQSTUDIO,
Tool/software:
We recently we found a small subset of static settings in data flash did not match the configuration file written to a battery pack. We suspect the write was interrupted or the SMBus experienced an error during the write from BQStudio.
We would like to introduce a production step, to verify the Static DF.
I see that there is a Static DF Signature noted in Section 18.1.6 of the TRM. However, it eludes to the device performing an internal checksum comparison, and returning only a 0 or 1 depending on the result.
We would like to externally calculate the checksum for the Static values of our Configuration file, as well as extract the checksum from the BQ40Z80, and compare the two.
Ie. we would like to ensure that the written Static DF values match our external Configuration file.
I realise that one can load up a configuration file in BQstudio, then read the flash from the BQ40Z80, and it will perform a compare by highlighting differing cells in Red. However, this is a slow, manual process. Also, we plan to switch over to using our systems' microcontroller (on the same SMBus as the BQ40Z80) to write the DF and verify the checksum.
Is this possible? If so, where can we find a list of values included in the subset of DF values considered "Static", so that we can calculate a checksum from our Configuration file?
thank you,
regards,
Daniel
