一共4个按键：确认/修改，移位，时间加，时间减



LCD1602界面说明：第一行为系统当前运行状态(两种)：

　　　　Runing-表示运行中不能设置任何参数

　　　　Timing-表示进入时间校时状态

　　　　　　第二行未当前时间显示与设置；

　　　　　　通过配合移位按键对应的时-分-秒进行闪烁指示，

　　　　　　再配合时间加/时间减进行参数校时；

-A total of four buttons: confirm/modify, shift, time plus, time minus LCD1602 Interface Descr iption: the first acts of the system is currently running (two kinds): Runing- indicates operation can not set any parameters　Timing- that enter the school at the time state　the second line is not the current time display and setting　by corresponding with the shift keys- were flashes to indicate seconds, and then with time plus/minus time timing parameters- points