#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define dula P1
#define wela P2
sbit key=P3^7;
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0};
uchar t0,t1,bai,shi,ge;
uint num;
void inter();
void display(uchar aa,uchar bb,uchar cc);
void Dispaley10ms(uint ms);
void main()
{
inter();
while(1)
{
display(bai,shi,ge);
if(key2==0) //开始计数
{
Dispaley10ms(1);
if(key2==0)
TR0=1;
while(!key2)
display(bai,shi,ge);
}
if(key1==0)//计数暂停
{
Dispaley10ms(1);
if(key1==0)
TR0=0;
while(!key1)
display(bai,shi,ge);
}
if(key3==0)//计数清零
{
Dispaley10ms(1);
if(key3==0)
{
num=0;
TR0=0;
}
while(!key3)
display(bai,shi,ge);
}
}
}
void inter()
{
TMOD=0x01;
TH0=(65535-10000)/256;
TL0=(65535-10000)%256;
EA=1;
ET0=1;
}
void timer0() interrupt 1
{
TH0=(65535-10000)/256;
TL0=(65535-10000)%256;
num++;
bai=num/100;
shi=num%100/10;
ge=num%10;
if(num==1000)
num=0;
}
void display(uchar aa,uchar bb,uchar cc)
{
dula=table[aa];
wela=0xfe;
Dispaley10ms(1);
dula=table[bb];
wela=0xfd;
Dispaley10ms(1);
dula=table[cc];
wela=0xfb;
Dispaley10ms(1);
}
void Dispaley10ms(uint ms)
{
uchar a,b;
for(;ms>0;ms--)
{
for(a=38;a>0;a--)
for(b=130;b>0;b--);
}
}
计数没法清零！大神们请赐教！谢谢！
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