BQ40Z80: BQKEYPACKAGER and BQKEYPROGRAMMER programmes

burak can sahin

Prodigy 20 points

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQKEYPACKAGER, BQKEYPROGRAMMER, , BQSTUDIO

Tool/software:

Hi Everyone

I have some questions about BQKEYPACKAGER and BQKEYPROGRAMMER programmes. I am waiting for your support

What is the difference between SHA1 Authentication Key F and Key C in bqKey Packager?
What do we use Comment for? Can you give an example application for this.
What is a FlashStream file and what does it do?
Is there a limiting system for programming the key? A system that will restrict mass production and will not cause problems in intermittent production.

Can you also share the documentation for BQKEYPACKAGER and BQKEYPROGRAMMER

Thank you for your help.

over 1 year ago

0 Dominik Hartl11 over 1 year ago

TI__Guru 61536 points

Key F and Key C are standard split SHA1 key components.

Comments are for documentation purposes. It's up to the customer to use this feature.

FlashStream: [FAQ] BQSTUDIO: What is the TI BMS Flashstream file format? - Power management forum - Power management - TI E2E support forums

Documentation is part of the application and available with the Help menu (Help->Help).

0 burak can sahin over 1 year ago in reply to Dominik Hartl11

Prodigy 20 points

Hello Dominik

We attempted to use the BQKEYPACKAGER and BQKEYPROGRAMMER programs, but we were unsuccessful. Below are the steps we followed, and we would appreciate your guidance on where we might have made a mistake:

We generated the SHA1 key using the BQKeyPackager program.
We programmed the key into the bq40z80 IC using the BQKeyProgrammer software.
The key was successfully verified.
A power-on reset was performed.
We connected to the device using Battery Management Studio (bqStudio) and set the LEGACY_SHA1 and SHA1_SECURE bits in the Auth Config register.
We then attempted to authenticate via the SHA Authentication section in Battery Management Studio, entering both the key and challenge, but the authentication process failed.

Best regards

0 Dominik Hartl11 over 1 year ago in reply to burak can sahin

TI__Guru 61536 points

Please make sure that you programmed the correct key data. Your first question was about key F and key C so I want to make sure that you actually use the correct key F and key C for your SHA1 authentication key.

See this long thread (with links to application notes and FAQs) for more info: e2e.ti.com/.../bq40z50-r2-fuel-gauge-authentication-using-encryption-key

0 burak can sahin over 1 year ago in reply to Dominik Hartl11

Prodigy 20 points

Hello Dominik

As shown in the first attached image, I successfully generated an SHA1 key using Key F and Key C without any issues. However, after performing a power on/reset and attempting to authenticate with this key (as seen in the second and third attached images), the digest values did not match, resulting in authentication failure. I have summarized the steps I followed above. Where could I be going wrong in this process?

Best regards

Burak