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PPI Timing in ITU-R 656-Mode (BF561)

Question asked by Hoagn on Oct 26, 2011
Latest reply on Dec 6, 2011 by Nabeel

Hi,

 

I'm using the ADSP-BF 561 EZKitLite and VisualDSP++ Vers.5.0 and I've a problem with the PPI-timing of the "video_in video out" sample of sdk4.10. By adding a delay via puffer structure (loopback) the delay gets smaller and then after a while bigger and so one. I ouptut the pointer of the actual adresses of PPI0 and PPI1 and the difference between the pointers gets bigger so the delay changes with time. What could be the reason for this properties?

 

Thanks&Regards, Sebastian

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