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TMS320C6678: The edma problem on tms320c6678

Part Number: TMS320C6678

Hi,I want to use the edma to copy the big data because of the speed.I programmed one procedure simulate the demo emda_test.c under the folder pdk, the procedure run successfully standalone without Notify,but my project is multicore,the conmmunication method bewteen multicore I used is Notify,when I transplant the edma procedure in the multicore project ,it failed to copy data.At first I guessed somewhere register is set wrong.I try to en canpsulate  the edma_test.c to a function,then I call the function in my multicore project, it still failed.I don't know what's wrong.can someon help me?