实验目的：熟悉USART通信.串口调试助手发送数据给877，877收到后再转发回串口助手-Experimental Objective: To know USART communications. Serial debugging assistant to send data to 877,877 and then forwarded back to receive the serial Assistant

串口调试助手能自动识别参数，进行串口数据调试-Serial debugging assistant can automatically identify the parameters, for debugging serial data

使用matlab编写的串口调试助手，可以实现接受串口数据并进行显示-Matlab prepared using serial debugging assistant can accept serial data and display