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uart 的方式 :dma 、isr 、usb

Other Parts Discussed in Thread: CC2530, CC2538

如题uart的实现方式。

在CC2530/HA 的sdk中默认优先使用DMA,也提供DMA源码。

在CC2538/Z3.0 的sdk中默认优先使用isr方式。未提供DMA源码。

CC2538片上是有硬件DMA的,为什么不用DMA呢?