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how to interface to a tms320 series MCU through SMBus?

Ras Sharif50
Genius 3455 points
Other Parts Discussed in Thread: BQ40Z60, CONTROLSUITE

Hi Everybody,

there is a battery management section in an application.

the bq40z60, a complete battery management IC ( charge + gauge + protection ), has been preferred to be selected if it can interface with a tms320 series MCU ( doesn't have SMBus ).

is it easy to implement SMBus using tms320 series MCUs?

(see: https://e2e.ti.com/support/power_management/battery_management/f/180/p/577069/2117899#2117899 )

regards,

Rasool

  • 0
    TI__Mastermind 20850 points

    Hi Ras,

    Most C200 devices do not support SMBus natively, i.e. there is no HW module for it. The TMS320F28004x familIf y of devices does have a single PMBus hardware module, and can possibly work for your application.

    For other device families you would have to run SMBus over I2C. We do have an application library that implements PMBus over I2C - depending on what portions of the SMBus transport protocol you need, this library may be useful to you. 

    You can find the code in controlSUITE (C:\ti\controlSUITE\libs\app_libs\comms\PMBus\v100)

  • 0
    Guru 192875 points

    Hi Rasool,

    Ras Sharif50 said:
    is it easy to implement SMBus using tms320 series MCUs?

    You can very well build SMBUS over I2C and its not a daunting task at all. I've done the same and its performance is good enough. Though I didn't refer to the library Vishal suggested above.

    Regards,

    Gautam  

  • 0 in reply to Gautam Iyer
    Genius 3455 points
    hi Gautam ,
    how should to do this?

    thank you,
    Rasool
  • 0 in reply to Ras Sharif50
    Guru 192875 points

    Ras Sharif50 said:
    how should to do this?

    You can go through the PMBus implementation: 

    I'd a very customized requirement for SMBUS and hence I built the same over I2C by simply modifying the I2CRegs configuration and TX/RX routines. Once SMBUS was successfully built, the rest of the protocol with PEC, ARP, SMBALERT# was built later.

    Regards,

    Gautam