• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 99 subscribers
  • Views 283 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

hard real time application with dsp bios

Nikolay Kokorin
Intellectual 875 points


Hi,

I need creating a application with cyclic execution every 833 us. In this time I must calculate several time of  FFT-expression and also some other math functions.

How I can create this task and minimizing execution latency on the DSP BIOS?

How many "pure" time left for mathematical calculations be avaible inside task?

How calculate cpu loading  for this task?

Thanks

  • 0
    TI__Mastermind 18320 points

    Nikolay,

    You say you are using DSP/BIOS?

    In DSP/BIOS 5.x, you can create a periodic function using the PRD module that fires at a pre-defined rate.  Have you looked at that?

    DSP/BIOS also has a CPU load function to show you how what percentage of the CPU cycles is being spent in the Idle thread vs other threads.  Were you aware of that?

    Dave

  • 0 in reply to David Friedland
    Expert 1115 points

    Hello Drugoi NIkolay,

    Please find the pdf file from the following link.

    http://software-dl.ti.com/trainingTTO/trainingTTO_public_sw/bios/BIOS_Workshop_Student_Guide_Rev5_93.pdf

    It has several lab sessions in one of session you find PRD creation. It gives snapshots too.

    All the best.

    With warm regard,

    WASHA DRUG,

    Prat