说明：  本程序是通用同步和异步串行接收器和转发器(USART)在异步状态下使用中断 * 方式进行全双工接收和发送数据的通信程序。共包括下面列表中这四个子程序。这 * 四个子程序的具体使用方法请参考各自的说明。
(this procedure is common synchronous and asynchronous serial receivers and transmitters (USARTs) in the state to use asynchronous interrupt* for full-duplex mode to receive and send data communications procedures. It includes the following list of the four routines. This subroutine* 4 to the specific use please refer to their respective explanations.)