串口商业程序范例： 接收和发射均采用中断模式，并且具备接收发射数据缓存功能，单片机可以方便的用状态机处理串口信息，商业程序最理想的处理方法，集成开发环境TKStudio。-Serial Business Program Example: Are used to receive and transmit interrupt mode, and have the receiver transmit data buffer function, the microcontroller can