动态数码管显示

动态数码管显示

#include<reg51.h>
#include <intrins.h>

/*0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f的编码*/
unsigned char code num[]= {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
/*需要显示的八个数*/
unsigned char mytime[]= {0x00,0x00,0x40,0x00,0x00,0x40,0x00,0x00};
/*138译码器的三个输入端*/
sbit ls1=P1^2;
sbit ls2=P1^1;
sbit ls3=P1^0;
/*延时xms毫秒*/
void delayxms(unsigned int xms)
{
unsigned int i,j;
for(i=0; i<xms; i++)
for(j=0; j<110; j++);
}
/*执行数码管显示函数*/
void display()
{
int i;
for(i=0; i<8; i++)//动态选择
{
switch(i)   //控制位选
{
case(0):
ls1=0,ls2=0,ls3=0;
break;
case(1):
ls1=0,ls2=0,ls3=1;
break;
case(2):
ls1=0,ls2=1,ls3=0;
break;
case(3):
ls1=0,ls2=1,ls3=1;
break;
case(4):
ls1=1,ls2=0,ls3=0;
break;
case(5):
ls1=1,ls2=0,ls3=1;
break;
case(6):
ls1=1,ls2=1,ls3=0;
break;
case(7):
ls1=1,ls2=1,ls3=1;
break;
}
P0=mytime[i];//段选：第i个数码管显示第i个数字
delayxms(1);
P0=0x00; //消隐
}
}

void main()
{
while(1)
display();
}