知识要点：理解熟悉单片机的逻辑运算

运行结果：P1 口输出4 次计算的数值,注意1 为灭0 为亮,从1.7 到1.0 排列

与的概念:有0 为0 全1 出1.或的概念:有1 为1 全0出0.取反的概念遇1 为0 遇0 为1

异或的概念:相同为0 不同为1-knowledge points : understanding the logic familiar with the MCU running Operational Results : P1 output four times the numerical calculation, To eliminate the attention of an 0-for from 1.7 to 1.0 and with the concept : all 0 0 1 1. or concept : have a whole for a 0 0. from the concept of anti-encountered a case of 0 0 or for a different concept : the same as for a different 0