串口测试小程序，简单易用的串口调试程序，可以进行简单的串口读写，并可以对读出字符截取。-Serial tests, easy-to-use small program of serial debugging, simple operation, and can read the serial to read characters.

实物调试：labview控制avr单片机下位机程序，接收上位机命令，进行串口测试，数码管显示的修改，I/0口的读取与写入。-Physical debugging: labview control avr microcontroller program under a machine, command, receive the upper machine serial tests, the changes of digital tube display, read and write I/0 in