数码管+LED灯+定时器中断

利用动态扫描和定时器1在数码管上显示出从765432开始以
1/10秒的速度往下递减直至765398并保持显示此数，与此
同时利用定时器0以500MS速度进行流水灯从上至下移动，当
数码管上数减到停止时，实验板上流水灯也停止然后全部开始
闪烁，3秒后（用T0定时）流水灯全部关闭、数码管上显示出
‘HELLO’，到此保持住。

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0,t1,flag,flag1;
uint shu;
uchar aa,bb,cc,bai,shi,ge;
sbit wela=P2^0;
sbit dula=P2^1;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x7b,0x71,
0x76,0x79,0x38,0x3f,0};
void init();
void Delay(uchar z);
void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge);
void main()
{
init();
while(1)
{
if(flag1!=1)
{
display(7,6,5,bai,shi,ge);
}
else
{
display(16,17,18,18,19,20);
}
}
}
void init()
{
flag=0;
shu=432;
temp=0xfe;
P1=temp;
TMOD=0x11;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET0=1;
ET1=1;
TR0=1;
TR1=1;
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
t0++;
if(flag!=1)
{
if(t0==10)
{
t0=0;
temp=_crol_(temp,1);
P1=temp;
}
}
else
{
if(t0%4==0)
{
P1=~P1;
if(t0==60)
{
TR0=0;
P1=0xff;
flag1=1;
}
}
}
}
void timer1() interrupt 3
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
t1++;
if(t1==2)
{
t1=0;
shu--;
bai=shu/100;
shi=shu%100/10;
ge=shu%10;
if(shu==398)
{
TR0=0;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;
flag=1;
t0=0;
P1=0xff;
TR1=0;
}
}
}
void Delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
{
for(y=110;y>0;y--);
}
}
void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge)
{
dula=1;
P0=table[aa];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
Delay(1);

dula=1;
P0=table[bb];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
Delay(1);

dula=1;
P0=table[cc];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
Delay(1);

dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
Delay(1);

dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
Delay(1);

dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
Delay(1);
}