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BQ27742-G1: how to program our golden image into the fuel gauge device?

mike zhang
Intellectual 925 points
Part Number: BQ27742-G1

Hi All,

we are going to use the device in our product with a small MCU. but we are not quite sure how to program the device with a golden image in the product. what is the procedure on the programming?

Thanks!

Mike

  • 0
    TI__Guru* 76230 points
    Hi Mike,
    You can use a bqfs,dffs or srec for mass production.
    Pls see app note below :

    www.ti.com/.../slua801

    hope this helps.
    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Intellectual 925 points

    Thanks Onyx!

    We are using MCU to manage the fuel gauge and planning to save a copy of golden image in flash memory (w/ limited space). The purpose is to deal with different batteries out of shelves. The golden image in flash is programmed into gas gauge when it is built up first time in factory or updated when battery is changed.

    Is there a binary format of image so MCU can load it into bq27742 data flash in one shot instead of command parsing/programming with I2C commands in .dffs one by one?

    Thanks!
    Mike

  • 0 in reply to mike zhang
    TI__Guru* 76230 points
    HI Mike,
    Those file formats are the only supported formats at the moment. Our earlier gauges used to support .dfi and .rom images which were binary files but not anymore. The srec though is a standard motorolla format and the flashstream files are hex files which don't take up a lot of memory, especially the .dffs

    thanks
    Onyx