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SPORT hung on 21469 FFT Accelerator

Question asked by ibotopal on Dec 3, 2010
Latest reply on May 10, 2011 by ibotopal

Hi,

 

I have a problem that I have been trying to solve for a while without success.

 

I'm working on a 21469 and trying to parallelise the FFTs using the accelerators. What I'm trying to do is to start the accelerator for ifft and at the interrupt service routine, start Accelerator again to perform fft. Looks like an easy task but I have been getting the error "Core access to a SPORT/LINK Port is hung at ... " error. It sometimes even causes the JTAG scan failure and disconnects from the target.

 

I'm not working at Repeat Mode as the twiddle factors have to be reloaded new at every call. Another reason is, I don't always need fft's/ifft's to run constantly after one another.

 

I created a small project to replicate my problem. It is attached to the post. Could someone point out the mistake I'm making?

 

Thanks beforehand

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