51单片机按住键盘,数码管会变亮,松开时变成正常显示亮度答:if(k1==0) { delay(5);setdisplay(hour,minute,second,year,month,date);if(k1==0) { flag=1;num++;while(!k1) setdisplay(hour,minute,second,year,month,date);switch(num) { case 1: flag=1; break;//year case 2: flag=1; break;//month case 3: flag=1; break;//day ...
8个按钮开关控制数码管显示0-7 (51单片机!) 要求:数码管在按钮没有...答:ORG 0000H JMP BEGIN ORG 0030H TABLE: ; 共阴极数码管显示代码表 DB 3FH,06H,5BH,4FH,66H ;01234 DB 6DH,7DH,07H,7FH,6fh ;56789 ;--- BEGIN:MOV R4,#0 MOV A,R4 ;R4位标志值送A寄存器 AGAIN: MOV DPTR,#TABLE MOVC A,@A+DPTR MOV P1,A...
如何在51单片机矩阵键盘里按一个键可实现数码管动态显示而不是一...答:include<reg51.h>#define uchar unsigned char;uchar distab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00}; //0到fvoid delay(unsigned int a){unsigned int i,j;for(i=0;i<a;i++)for(j=0;j<120;j++);}uchar kb...