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介绍两种常用的DSP串口扩展,然后提出一种利用单个GPIO扩展一个半双工串口的方法,并给出实现电路和部分收发程序。
Describes two commonly used DSP serial port expansion, and then presents a way to use a single GPIO to extend a half-duplex serial port, and gives the realization of the circuit and part of the transceiver.