BQ34Z100-G1: FlashStream file with more than 32 bytes data in string

Dmytro

Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: EV2400, BQSTUDIO, BQ34Z100

Hello,

I use direct I2C communication between the BQ34Z100-G1 fuel gauge IC and microcontroller, which act as I2C master.
Unfortunately I have not the EV2300/EV2400 device, and at this time I have no possibilites to buy it.

I read a lot of documentation and information about the IC, from Texas Instruments and from this forum.
At present time, I can communicate with the IC by I2C protocol.
I can send and get results for the commands, the extended commands, read flash data and write flash data into the IC, without EV2300/EV2400 and bqStudio.

But!

Now I need to write the df.fs file (FlashStream) to the IC.
The file I received from my friend who have the EV2400 device and EVM with BQ34Z100-G1 on board.
He created the golden image for my battery, and send FlashStream files to me. And I want to write the data from the FlashStream file into IC.

But I can not understand the discrepancies between the contents of FlashStream file and the C code from the SLUA801 document.

The discrepancies in the fact, that the gauge_execute_fs function writes 32 bytes of data only, from each string
of the FlashStream file, to the IC, and the rest of the data, in the string, the function simply throw out.
The gauge_execute_fs function C code locate on pages 13 and 14, in SLUA801 document.

But FlashStream file (.df.fs) contain W: strings, with mush more than 32 bytes data in strings.
Moreover .bq.fs contain a lot W: strings, with more than 32 bytes data.

And, as I see, first short strings (commands) from FlashStream file switching the IC into ROM mode.

My questions is:
Can I write entire data, more than 32 bytes, from FlashStream file string, into BQ34Z100-G1 when it in ROM mode ?
Is it will error or not ?

Thank in advance.
Dmytro

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

Hello Dmytro,

Are you able to share with me your df.fs file? I will take a look and then get back to you.

Andy

0 Dmytro over 5 years ago in reply to Andy Liu (BMS)

Prodigy 120 points

Hello Andy,

Thank you for fast response.

In attached zip file, my .df.fs

Please look into it .

For mutual understanding:

When I say bytes, I mean binary bytes, not it representation in FlashStream hex text format.

The W: strings numbers 28 and 32, I count string numebrs starting from first string in file, contain much more bytes than 32.

While the function gauge_execute_fs skip all data from such string if bytes count more than 32.

Thank you again.

Regards,

Dmytro

bq34z100G1_df_fs.zip

0 Dmytro over 5 years ago in reply to Dmytro

Prodigy 120 points

I still waiting for an answer to my question.

Maybe someone else, from Texas Instruments, can help?

Regards,

Dmytro

0 Andy Liu (BMS) over 5 years ago in reply to Dmytro

TI__Guru 52115 points

Allow me to take some time to take a close at the file your provided.

Andy

0 Dmytro over 5 years ago in reply to Andy Liu (BMS)

Prodigy 120 points

Ahh Andy,

I apologize for my impatience.
The file is standard .df.fs file, exported by bqStudio.
But I do not understand some things, described in my first post.

Thank you.

Regards,
Dmytro

0 Andy Liu (BMS) over 5 years ago in reply to Dmytro

TI__Guru 52115 points

I have looped in my colleague who is the author of the app note you mentioned. We will give you the answer soon.

Andy

0 Dominik Hartl11 over 5 years ago in reply to Dmytro

TI__Guru 61266 points

I wrote this app note for a .gm.fs file and a gauge that limits data blocks in data classes to 32 bytes.

The.df.fs file for the bq34z100 uses a different size limit (it uses the gauge in a mode that doesn't limit the data block to 32 bytes) so I recommend to just increase the limit in the source code.

0 Dmytro over 5 years ago in reply to Dominik Hartl11

Prodigy 120 points

Hello Dominik

Thank you so much for the information!
I had the same thought that this is just code for chips with a limit of 32 bytes per block.
But since the documentation on bq34 does not say anywhere about the absence of such a limit,
I needed to confirm this.
You did it, for which I am very grateful to you!

I also thank Andy for the work!

Regards,

Dmytro.

0 Dmytro over 5 years ago in reply to Dmytro

Prodigy 120 points

Hello,

I flashed the df.fs file into the BQ34Z100-G1, directly via I2C, according to the recommendations from Dominik.
Once again thank a lot to all the participants in the discussion.

Regards,
Dmytro

Power management

Power management forum

BQ34Z100-G1: FlashStream file with more than 32 bytes data in string