说明：  中断现场保护程序，虽是简洁易懂，但在单片机应用的场合，此程序会带来意想不到的好处。还加上中断应用和定时中断应用程序
(Interrupted the scene protection procedures, although it is easier to understand, but in single-chip application of the occasion, this procedure will bring unexpected benefits. Also coupled with disruption of applications and applications from time to time interrupted)