2、从机：在P1口上实现流水灯，串口接收从主机发送过来的异步串行数据，将数据在从机板子上的数码管进行显示，并通过对数据的判断调节流水灯的速度（比如：0是最慢，F是最快，中间字符对应的流水灯速度依次递增，要能明显区分）。异步串行通信的要求：从机使用单片机自带的串口进行数据接收，速度是2400波特率。-2, from the machine: to achieve water in the P1 port lights, sent from the host over the serial port to receive asynchronous serial data, the data on the board from the machine to display the digital control and regulation through the flow of data to determine the speed of light (such as : 0 is the slowest, F is the fastest, the middle character corresponding to the speed of light water gradually increased, to be able to clearly distinguish.) Asynchronous serial communication requirements: from the machine comes with the serial port using the single chip data receiver, speed is 2400 baud.