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DSP TMS320F28335 connect to BQ76940 by I2C communication

Long Pham Van
Prodigy 230 points
Other Parts Discussed in Thread: TMS320F28335, BQ76940, CONTROLSUITE

Hi everyone,

I would like to make the code connect from DSP TMS320F28335 to IC bq76940 (TI), family of robust analog front-end (AFE). I see that they can communicate by I2C communication.

Is that possible? And can I get the support from TI to make the code?

Thank you very much!

  • 0
    Guru 192875 points
    Hi,

    I2C drivers are very well available in controlSuite that you can refer to and modify for BQ IC.
    C:\ti\controlSUITE\device_support\f2833x\v140\DSP2833x_examples_ccsv5\i2c_eeprom

    Regards,
    Gautam
  • 0 in reply to Gautam Iyer
    Prodigy 230 points
    Dear Mr. Gautam,

    Thank you very much for your support.
    I have see the code in the C:\ti

    Thank and best regards,
    Long
  • 0 in reply to Long Pham Van
    Guru 192875 points
    You're Welcome Mr. Long!
    Let us know if you need more help on this.

    Goodluck & Regards,
    Gautam
  • 0 in reply to Gautam Iyer
    Prodigy 230 points

    Hi Gautam,

    I am making the code and I get problem with I2C signal.

    When the DSP is not connect to the BQ76940, the I2C signal which is measured at DSP is good, like this

    nol_conect_monitor2.tif

    The IC is other PCB, and when I connect DSP to IC by some line, the frequency is  change to 84 khz of SCL and SCL signal is distorted, like this:

    conect_cell6.tif

    With the SCL signal like that, is there any problem for DSP to understand the news is transfer from the BQ76940?

    And from the I2C signal, how I can determine the cell voltage (the Lithium cell are connect to IC, IC measure the cell voltage and report to DSP) 

    Thank and Best regards,