#include "reg52.h"
typedef unsigned int u16;
typedef unsigned char u8;
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
u8 num,n,i;
void DigDisplay()
{
i++;
if(i>=8)
i=0;
switch(i)
{
case(0):
LSA=0;LSB=0;LSC=0; break;
case(1):
LSA=1;LSB=0;LSC=0; break;
case(2):
LSA=0;LSB=1;LSC=0; break;
case(3):
LSA=1;LSB=1;LSC=0; break;
case(4):
LSA=0;LSB=0;LSC=1; break;
case(5):
LSA=1;LSB=0;LSC=1; break;
case(6):
LSA=0;LSB=1;LSC=1; break;
case(7):
LSA=1;LSB=1;LSC=1; break;
}
P0=smgduan[n];
}
void main()
{
TMOD=0x01;
TH0 = 0xEE; //设置定时初值
TL0 = 0x00; //设置定时初值
EA=1;
ET0=1;
TR0=1;
num=0;
n=0;
i=0;
while(1);
}
void time0()interrupt 1
{
TH0 = 0xEE; //设置定时初值
TL0 = 0x00; //设置定时初值
num++;
if(num>=200)
{
num=0;
n++;
if(n>=10)
n=0;
}
DigDisplay();
}
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