说明：  PowerPC与PC微机串行通信，通过CS850实验板的SMC端口与PC微机的串行口实现UART协议异步通信。PC机通过仿真终端程序实现字符输入和输出，并可实现文件传送CS850实验板上的SMC驱动软件实现ECHO操作，将从接收端口接收到的字符通过发送端口送出
(PowerPC computer with the PC serial communication, through the CS850 test SMC board computer' s serial port and PC port UART protocol to achieve asynchronous communication. PC-terminal emulation program through the realization of character input and output, and can achieve file transfer CS850 test SMC board-driven software ECHO operation, the port received from the receiver by sending the port of characters sent)