怎么用单片机按键控制循环跑马灯???答:/*硬件电路连接:流水灯接在P0口, 阳极接高电平,阴极接P0口,4个按键分别接P3.4,P3.5, P3.6,P3.7 ,按下时是低电平 */ include <regx51.h> sbit key1=P3^4;sbit key2=P3^5;sbit key3=P3^6;sbit key4=P3^7;int a[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};/...
怎么用单片机按键控制循环跑马灯???答:/*硬件电路连接:流水灯接在P0口, 阳极接高电平,阴极接P0口,4个按键分别接P3.4,P3.5, P3.6,P3.7 ,按下时是低电平 */ include <regx51.h> sbit key1=P3^4;sbit key2=P3^5;sbit key3=P3^6;sbit key4=P3^7;int a[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};/...