P1=0x7F; for(i=0;i>=1; P1 |=0x80; }
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![P1=0x7F; for(i=0;i>=1; P1 |=0x80; }](/uploads/image/z/10209974-14-4.jpg?t=P1%3D0x7F%3B+for%28i%3D0%3Bi%3E%3D1%3B+P1+%7C%3D0x80%3B+%7D)
P1=0x7F; for(i=0;i>=1; P1 |=0x80; }
P1=0x7F; for(i=0;i>=1; P1 |=0x80; }
P1=0x7F; for(i=0;i>=1; P1 |=0x80; }
这是一个将P1的数据进行移位操作;这是个单片机P1口的控制程序吧.
如果P1口接8个LED,则程序将会从P1口最高位亮,然后从高位到低位移动.