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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_CA...

...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...

...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 >> >> >&gt...