基于中断的串口驱动及显示程序

说明：  基于中断的串口驱动及显示程序,收发缓冲区实体,收发缓冲区读写指针,串口初始化,串口缓冲区初始化,串口中断服务子程序
(based on the serial interrupt-driven and show procedures, TX buffer entities, TX buffer literacy target, serial initialization, serial buffer initialization, interrupt service routines)