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BQ27542-G1: Creating a golden image issues

Trevor White
Intellectual 270 points
Part Number: BQ27542-G1
Other Parts Discussed in Thread: BQSTUDIO

I have the Gauge Development Kit and have been conducting some Learning Cycle tests with bqStudio. When it indicates the learning cycle is successful I find that the Update Status is set to 0x06 and not 0x02. I tried to find a description for this register but it does not seem to be in the datasheet.When I read Data Memory and highlight Update Status It shows me that Bit2 is

When I read Data Memory and highlight Update Status It shows me that Bit2 is labelled 'Enable' and Bit1 is labelled, 'UPDATE1'. Is there any documentation on this register? I want to know why when I start the learning cycle Bit2 is always set? Is this correct? 

When I finished a learning cycle and it indicates the cycle was successful I then try to use the Goldenizing plugin to generate the files and it states that Update Status is 6, should be 2. So This Bit2 represents a sticking point at the moment for me and I can not find out what it means. 

Also it would be really nice to be able to factory reset the gauge. Is there a way to reset all values back to factory default? 

Help would be appreciated. 

Thanks

Trev

  • 0
    TI__Expert 3350 points

    Trevor,

    The BQ2754-G1 is a battery side gauge; this means that when a learning cycle is completed the update status should read 0x06. 

     

    You would need to program the default srec. file into the gauge to have it completely reset.

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/bq27542_2D00_G1.srec

    For more in depth information check out the Technical Reference Manual of the gauge. Link below.

    BQ27542.pdf

  • 0 in reply to David C
    Intellectual 270 points

    Thank you for the reply and technical reference, much appreciated. 

    Why when I use bqStudio to goldenize the device does it state the Update Status should be 0x02 not 0x06? This is after I used the Gauge Development Kit to perform a Learning Cycle?

    All the documents I find about performing learning cycles are for old software. I can not seem to find documents related to bqStudio.

  • 0
    TI__Expert 3350 points

    Trevor,

    BQstudio is prompting you to manually change the 0x06 to 0x02 before importing it to another device.

    The Qmax and resistance tables will be saved but Impedance Track will be disabled.

    Once you load up the Golden file on another device enable Impedance Track to change the 0x02 back to a 0x06. This will also enable the lifetime parameter.

    -David

  • 0 in reply to David C
    Intellectual 270 points
    Thank you, that helps a lot.

    It is a shame all the current documentation seems to be for the older software packages and not bqStudio.

    Trev