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TMS320F28335 slowly

munoz0raul
Intellectual 475 points
Other Parts Discussed in Thread: TMS320F28335

Hello All

I start to use the DSP TMS320F28335 in my project but I have some problems, in my project I'm reading the ADC and calculate all the time these value!

The problem is that I need wait about 5 seconds my answer!

I want to know If is possible to change this DSP that RUN at 150MHZ for another DSP that have the same characteristic and RUN faster?

Thanks For All

 

  • 0
    TI__Expert 4760 points

    Hi Raul,

    This does not sound like typical performance for the 28335, so I don't believe that switching out the DSP device is the right solution.

    You mention that you are reading a constant value.  What value are you reading?  Could you describe your hardware setup that has led you to conclude that the ADC is converting this slowly?  Are you using code from TI, or did you write it yourself?  Are you reading the result back via a CCS watch window?  Also, how are you initializing the device?

    Thanks,

    Dave

     

  • 0 in reply to Dave (Wisconsin) Wilson
    Intellectual 475 points

    I know that is a processor time because  I make the FFT and 30 kinds of calculation.

    The problem to me is a DSP that run at 150Mhz....

    We try to change the calculation but WE need to make all of this!

    I really want to try change the CPU with out change my hardware setup code!

     

    Thanks For all 

  • 0 in reply to munoz0raul
    TI__Expert 4760 points

    Thanks for clarifying your question.

    Unfortunately, the only other devices in the Delfino family that can run at higher clock speeds do NOT have an integrated ADC.  If you are willing to consider using an external ADC, then you might want to take a look at the 28344 and the 28346.  Both of them run at 300 MHz, and have an interface for an external ADC.

     

    Regards,

    Dave

     

  • 0 in reply to munoz0raul
    TI__Guru 55700 points

    Raul,

    Can you please answer the following questions:

    (1) Do you see the same problem when you run your code on multiple F28335 (or) you see this problem on one particular F28335 device?

    (2) Have you tried running TI's ADC example code available in C/C++ peripheral header examples

    (3) Are you trying to calculate FFT and other calculation on the analog signal you fed into ADC?

    (4) Did you check you XCLKOUT frequency?

    Regards,

    Manoj