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how to generate random numbers on TMS320x28x

Maria Perdomo
Prodigy 230 points
Other Parts Discussed in Thread: CCSTUDIO

Hi,

Im very new in embedded coding. I would like to generate a random number. Im using CCStudio and coding in C. Can I use the tipical rand() function ? Which library do i need. or where could i find information about this?

Thanks

  • 0
    Prodigy 230 points

    I found this note, it helped me to understand random generation through the linear congruential method. :P

    http://www.ti.com/lit/an/spra239/spra239.pdf

  • 0 in reply to Maria Perdomo
    TI__Guru 60865 points

    Thanks for posting this.  I am sure other forum users will find it helpful.  

    If you need something faster, but not quite as random, you can use a LFSR (linear feedback shift register).  Wikipedia has some C code that ports pretty much directly to the DSP.

    If you need something more truly random (but much slower), you can sample a noisy signal with the ADC and take the lower order bits.  This could be a way to seed your random number generator too.