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TMS320F28379D: Extracting bit wise data from an unsigned 16-bit integer

Kevin Bachovchin
Prodigy 20 points
Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE

Hello,

Is there a way to be able to extract bit-wise data from a Uint16 variable?  When viewing the Uint16 in the Expressions window in CCS, I can see the binary representation, but is there a way to be able to access individual bits in the code (for example to access the 3rd bit)?

I could write my own function for converting from a Uint16 to binary, but I imagine there's some easier way to do this.

Thanks,
Kevin

  • 0
    TI__Mastermind 30185 points

    Hello Kevin,

    Because the C28x device uses a 16-bit word, there is no intrinsic way to extract just a single bit via hardware. The reason bitfields are possible is because of the library support for them in C2000Ware, however there is no similar support for normal integer variables. If you want to have the ability to extract specific bits from uint16_t variables I believe you will need to create your own functions, but I will let a compiler expert confirm this.

    Best regards,

    Omer Amir

  • 0 in reply to Omer Amir
    Expert 1060 points

    Omer,

    Thanks for your reply.  Could you clarify what you mean by "The reason bitfields are possible is because of the library support for them in C2000Ware".  Is there a library function in C2000Ware I can use for extracting bits?

    Thanks,

    Kevin

  • 0 in reply to Kevin Bachovchin
    TI__Mastermind 30185 points

    Hi Kevin,

    Kevin Bachovchin said:
    Is there a library function in C2000Ware I can use for extracting bits?

    This only applies to peripherals on the device, not integers (this uses structs to delineate the bit values, but they are all still Uint16 data types). You can look in the C2000Ware_5_00_00_00\device_support\f28p65x\headers\include directory in C2000Ware for more info.

    Best regards,

    Omer Amir