FFT build with DSP

hello Shawn Steenhagen,
I thank you for your answer.

I've done so you said me. 
I took the magnitude of the result of rfft().

then I plotted it in ccs, but I haven't got the expected result. I
expected to see only one peak, that correspond to the frequency of the
sine.

And if I take a rectangle input, then I don't see Harmonic waves and
any peaks.

I would like to sent you my quellcode or show you it somehow. It can
be possible, that I write only one Line false, and that make my plott
fals.

can I upload my project somewhere on this site or like attachment in
my message?

thank you.

You could probably cut and paste the high level main code showing how you
are generating the sine wave, how you are calling the rfft( ) and how you
are calculating the magnitude.  Then perhaps myself (and others) will be
able to help you, but I can't commit to debugging your project for you via
this newsgroup.

-Shawn


"Eugene" <johnbesel@web.de> wrote in message
news:6484110f.0412170527.75cdf065@posting.google.com...
> hello Shawn Steenhagen,
> I thank you for your answer.
>
> I've done so you said me.
> I took the magnitude of the result of rfft().
>
> then I plotted it in ccs, but I haven't got the expected result. I
> expected to see only one peak, that correspond to the frequency of the
> sine.
>
> And if I take a rectangle input, then I don't see Harmonic waves and
> any peaks.
>
> I would like to sent you my quellcode or show you it somehow. It can
> be possible, that I write only one Line false, and that make my plott
> fals.
>
> can I upload my project somewhere on this site or like attachment in
> my message?
>
> thank you.