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TMDXEVM5515: DMA not working until reset power

Part Number: TMDXEVM5515

Hello,

I am running the MDK example code. The audio from MIC is using DMA to transfer to HP output. There is a DMA callback function which will be called when data is ready. I am using CCS4 to debug run. Firstly, I ran it well, then I stop the debug run in CCS4. and press debug run again without power off and power on the board. The DMA callback will not be called in this second run. If I reset the board before run it, it works fine. My problem is does DMA engine needed to be reset in the board level to work normally?