I am just getting started with the BQ20z75ev1-001 evaluation kit, and have four cells wired up as directed to the eval board. bqEVSW recognizes the setup, and I can successfully communicate with the bq20z75 device. However, I cannot get the SHA-1 function to work. I am attempting to use the procedure outlined in Chapter 13 of SLUA404 bz20zxx Application Book. I can successfully read and verify the authentication key (it is set to the default), and can modify said key. I apparently can send the challenge message using the Write SMB Block function, as directed. However, when I try to read by the challenge response, I get all zeros.
From what I've read, the device comes in the full-access mode, and I haven't (intentionally) changed this; furthermore, as far as I can tell, the device indicates the same (if I'm reading that correctly). To be real clear, I enter 54 in the "Read SMB Word" section of the Pro page in bqEVSW, and hit the Read button; the system returnes 0040, which I interpret the following:
- FAS bit is low, meaning the Full access security mode is active
- SS bit is low, meaning Sealed mode is NOT active
What am I missing?
TIA,
Bob
