指拨开关的输入，本代码的目的是使用8051的Prot1连接到8颗LED，Prot2则连接到1个指拨开关，当用户拨动开关时，相对应的LED就会亮或者灭。-Dial switch input means, the purpose of this code is to use 8051 to connect to the Prot1 of 8 LED, Prot2 is a means to connect to the dial switch, when a user DIP switch, the