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

用于labview编程，串口发送与接受例程应用VISA与串口进行通信-For labview programming, sending and receiving routine application serial and serial communication VISA