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之前根据STARTER WARE里的USB代码做了USB驱动，但抓了数据发现有重传现象，且ACK和下一条令牌包中间有较长的等待时间，请问可能是什么原因呢？如果要启用DMA传输，要怎么初始化QUENE以及LINK REGION?求高手指点一下
忘了说，用的是OMAL138
starterware里面的DEMO 可以通过#define DMA_MODE来打开CPPI DMA
