Re: Help.....DSP on ARM9 or ARM7!!!!


Wilco Dijkstra wrote:
> "jagdish.dsp" <jagdish.dsp@xxxxxxxxx> wrote in message
> news:uuSdnROkSq5X0UPeRVn-uQ@xxxxxxxxxxxxxxx
> > Dear Friends,
> >
> > In my design I need to develope a DSP algorithm on one DSP processor and
> > then to interface same with ARM which is handling all the peripherals.
> >
> > I am thinking if my DSP algorithm can be implemented on ARM or not...so
> > need you help. Right now I am using evaluation board of Texas DSK, so
> > taking the input from microphone is given to CODEC(A to D conversion)
> > whose sampling freq is 32KHz.
> >
> > I have to implement 8192 point FFT on real time sound data....
>
> An ARM7 takes 2Mhz to perform a 8192 complex Q15 FFT. ARM9E is twice as
> fast.

That's for doing one per second, which is unlikely for any reasonable
algorithm.

>
> > And also want to implement Low pass FIR filter on Real time sound data
> > before doing FFT. So can this be implemented on ARM 9 platform??????
>
> Your requirements add up to around 10Mhz on an ARM7. Unless power
> consumption is key, no need for a DSP.

DSPs are designed exactly for these things.

>
> Wilco

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