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Discussion Groups | TMS320C54x | Random number generation initialization

Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).

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Random number generation initialization - Cesar - May 2 7:47:57 2007

Hi, I want to implement a random number generator into my C5410 DSP. I
have found code for rand routines, but I have noticed the seed of the
generator is always the same, so the numbers generated are each time I
begin my program the same. Is there any way to achieve a "real" random
initialization, so not always the same numbers being generated?
Thanks

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Re: Random number generation initialization - Jeff Brower - May 2 14:16:13 2007

Cesar-

> Hi, I want to implement a random number generator into my C5410 DSP. I
> have found code for rand routines, but I have noticed the seed of the
> generator is always the same, so the numbers generated are each time I
> begin my program the same. Is there any way to achieve a "real" random
> initialization, so not always the same numbers being generated?

Is there anything on your card having to do with date/time the DSP can read?  If the DSP can
read something that
changes every time it boots up, then you can use that data to change the seed.  Maybe a general
purpose CPU somewhere
else in the system can send some "time-varying" info to the DSP on boot-up.

-Jeff