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MSPM0L1105: How to configure the device address for I2C

Jared Becker
Genius 11495 points
Part Number: MSPM0L1105

Hi Team,

How is the device address configures on the 1105 for I2C? Goal is to have multiple 1105's share the same I2C bus..

-Jared

  • 0
    TI__Mastermind 27535 points

    Hi Jared,

    Take a look at the DL_I2C_setTargetOwnAddress, and DL_I2C_setTargetOwnAddressAlternate  APIs within driverlib. As the name implies, these set the target address for the MSPM0L1105 I2C peripheral being used. 

    In the MSPM0L Technical Reference Manual, you can look at the SOAR and SOAR2 registers to see what they are setting. 

    Best Regards,
    Brandon Fisher

    Edited to fixed images

  • 0 in reply to Brandon Fisher94
    TI__Genius 11495 points

    Thank you Brandon! 

    So no I/Os need to be used to hardcode the address, correct?

    -Jared

  • 0 in reply to Jared Becker
    TI__Mastermind 27535 points

    Correct.

    You could read the state of some I/Os on startup and set this address based on that if you wanted to, but these values can be set purely programmatically.

    The only time I can think of where you might want to read I/Os like this is if you didn't know how many MPSM0Ls would be on the bus, and you wanted to use the same firmware for all of them. 

    Best Regards,
    Brandon Fisher