B S-
> I am working with C6713 DSK and ADS7881 converter. I
am trying to make a FFT
> analyzer. My project is working fine at the moment but it is lacking with
real
> time implementation. Now I want to use PING PONG buffer scheme to make it
real
> time FFT analyzer. My idea is to capture samples in PING buffer and by the
time
> PONG buffer is filled with new sample compute FFT of data stored in PING
buffer
> and continue in the same manner.
>
> I did work hard but couldn't figure out how to implement this. I saw
some
> examples but they are using McBSP which is used for serial interface but
ADS7881
> has parallel interface with DSK.
>
> I will really appreciate if some one help/guide me how can I do it ?
I believe Rulf Chassaing's book shows how to do this:
http://books.google.com/books?id=hrlRFMh-dgYC&printsec=frontcover&dq=Chassaing+DSK+C6713&source=bl&ots=oQkf-uKGyG&sig=StRwGcibCrK8rJ03iCvK32vMR6M&hl=en&ei=ZxOuTaLMFIj00gG_tc25Cw&sa=X&oi=book_result&ct=result&resnum=1&vedBgQ6AEwAA#v=snippet&q=ISR&fse
Search for example 6.2, "FFT of a Real-Time Input Signal Using an FFT Function
in C". It talks about using an ISR and
circular buffers.
-Jeff
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