有限状态机FSM思想广泛应用于硬件控制电路设计，也是软件上常用的一种处理方法(软件上称为FMM--有限消息机)。它把复杂的控制逻辑分解成有限个稳定状态，在每个状态上判断事件，变连续处理为离散数字处理，符合计算机的工作特点。同时，因为有限状态机具有有限个状态，所以可以在实际的工程上实现。但这并不意味着其只能进行有限次的处理，相反，有限状态机是闭环系统，有限无穷，可以用有限的状态，处理无穷的事务。-FSM thinking widely used hardware control circuit design, the software is commonly used on one method (FMM called on the software -- limited information machines). Its complex control logic is decomposed into a finite number of stable state, in every state judgment on the incident, treated as continuous variable discrete digital processing, compliant work characteristics. Meanwhile, as the finite state machine with a finite number of the state, so it can be in the actual realization of projects. This does not mean that its only a limited time to deal with, on the contrary, finite state machine is the closed-loop system, limited infinite, you can use the limited state, handling endless affairs.