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Hi everyone,

I am working on DSK5416 and CCS.
I'm doing real-time using DMA and McBSP to communicate with the codec. I'm working with 16 bits
words and with DSP/BIOS configuration. 
I would like to know if the problem that I have is coming from data alignment.
After interruption (full buffer: 1024 words of 16 bits) I use the following function:
Interrupt function(){
int i=0,maxisync,maxicanal;
	for (i=0;i<Nx;i++){
		OutBuffer[i]=InBuffer[i];
	}
	// Input FFT 
	cbrev(OutBuffer,OutBuffer,NFFT/2);
	rfft(OutBuffer,NFFT,1);
	// Matched Filter
	for (i=0; i<NFFT;i++){
	  FiltreAdaptesync[i]=(OutBuffer[i]/10*chirpsync[i]/10);		
	}
	/*cbrev(FiltreAdaptesync,FiltreAdaptesync,NFFT/2);
	rifft(FiltreAdaptesync,NFFT,1);*/
}
I also have the following extra configuration file:

-l audioIODmacfg.cmd

SECTIONS{
InBufferSect: > IDATA PAGE 1,align(0x800)
OutBufferSect: > IDATA PAGE 1,align(0x800) 
FAsyncBufferSect: > IDATA PAGE 1,align(0x800)
}
As you can see after interruption I’m doing an fft of the receive buffer and a matched
filtering. 
My problem is when I’m computing the ifft of vector FiltreAdaptesync the result of the fft
OutBuffer is not good. However, when I don’t compute the ifft, then the result of OutBuffer 
fft is good.  I don’t understand why.  

Thank you for your help
getthematrix 
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