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6657upp接口和EDMA



求教!

         我在6657程序中使用了upp接口和6657的EDMA。问题是,我6657的EDMA一启动,upp接口会丢失数据。就好像upp自带的的DMA不工作了。请问,upp自带的DMA和6657的DMA应该是独立的吧?为什么会相互影响呢?

谢谢!