用C#（Csharp）编的上位机程序 和WINAVR(gcc)编译的下位机程序，下位机用C写的，能够实现USART串口的收发，稳定，但是还暂时不支持中文。-With C# (Csharp) series of PC programs and WINAVR (gcc) compiler lower computer program, the next bit machine written in C, can be achieved USART serial transceivers, sta