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...to implant speex echo canceller on the Blackfin DSK version of speex to work on the BF533 EZ-KIT LITE But i can perform the echo canceller to work This is my code, so if somebody can tell me where i'm wrong //----------------------------------------------------------------------------- // CallBackFunction() - Gets called by the audio pseudo-driver when a new audio // block is ready to be played. //----------------------------------------------------------------------------- int CallBackFunction(PVOID inputBuffer, PVOID outputBuffer, PVOID userData) { ezTurnOnLED(LED_CALLB...

...main 0 is UP. The reason is, after finishing a dma request, the dma thread will trigger the interrupt and then clear the call back function. When guest get the interrupt , it will try to check the call back function, if it is set, then it will trigger a dma request again. So if the checking for the callbackfunction happens between trigger interrupt and clear callback function on dma thread, it will cause NULL function calling. After with domain 0 UP and smp platform, this situation can be reproduced easily. Thanks Yunhong Jiang This patch fix this issue by placing the interupt request in the end of dma thr...

...st, the dma >thread will >> trigger the interrupt and then clear the call back function. >When guest >> get the interrupt , it will try to check the call back >function, if it >> is set, then it will trigger a dma request again. So if the >checking for >> the callbackfunction happens between trigger interrupt and clear >> callback function on dma thread, it will cause NULL function calling. >> After with domain 0 UP and smp platform, this situation can be >> reproduced easily. >> >> Thanks >> Yunhong Jiang >> >> >> T...