根据51hei单片机开发板的计时器程序
#include
#define uint unsigned int
#define uchar unsigned char
uchar temp,bai,shi,ge,aa;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void display(uchar bai,uchar shi,uchar ge);
void delay(uint z);
void init();
void main()
{
init(); //初始化子程序
while(1)
{
if(aa==20)
{
aa=0;
temp++;
if(temp==100)
{
temp=0;
}
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
}
display(bai,shi,ge);
}
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x–)
for(y=110;y>0;y–);
}
void display(uchar bai,uchar shi,uchar ge)
{
dula=1;
P0=table[bai];
dula=0;
P0=0xff;//
wela=1;
P0=0xfe; //位选通
wela=0;
delay(1) ;
dula=1;
P0=table[shi];
dula=0;
P0=0xff; //消隐
wela=1;
P0=0xfd;
wela=0;
delay(1) ;
dula=1;
P0=table[ge];
dula=0;
P0=0xff;// 消隐
wela=1;
P0=0xfb;
wela=0;
delay(1) ;
}
void init()
{wela=0;
dula=0;
temp=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void timer0() interrupt 1
{ TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
}
