Description: PC-MCU and host computer communication program design: ⑴ serial port initialization: the baud rate as 4800 ⑵ serial receive data: the serial port is initialized in the data receiving state, when serial data arrives, the serial port to receive data stored ⑶ in temporary register serial send data: such data reception is completed, the temporary register in the data sent through the serial port to the data source.
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