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- 用89C51的P1口做输出口,接八只发光二极管,编写程序,使发光二级管循环点亮。刚开始时P1.0点亮,接着是P1.1、P1.2、P1.3……P1.7点亮,重复循环-89C51 to do with the P1 port output, then eight light-emitting diodes, programming, so that light emitting diode loop. Beginning of the P1.0 light, followed by P1.1, P1