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O以500MS速度进行流水灯从土至下移动,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TO定时)流水灯全部关闭、数码管上显示出"HELLO”。到此保持住。
#include
#include
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0,t1,bai,shi,ge,flag,flag1;
uint shu;
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,
0x36,0x79,0x38,0x3f,0};
void init();
void delay(uint 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()
{
shu=432;
temp=0xfe;
P1=temp;//点亮第一个发光二极管
TMOD=0x11;
TH0=(65536-5000)/256;//装初值
TL0=(65536-5000)%256;
TH1=(65536-5000)/256;//定时器1装初值
TL1=(65536-5000)%256;
EA=1;
ET0=1;
ET1=1;//开定时器1
TR0=1;
TR1=1;//启动定时器1
}
void timer0() interrupt 1
{
TH0=(65536-5000)/256;//装初值
TL0=(65536-5000)%256;
t0++;
if(flag!=1)
{
if(t0==10)
{
t0=1;
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=(65536-5000)/256;//装初值
TL1=(65536-5000)%256;
t1++;
if(t1==2)
{
t1=0;
shu--;
bai=shu/100;
shi=shu%100/10;
ge=shu/10;
if(shu==398)
{
TR0=0;
TH0=(65536-5000)/256;//装初值
TL0=(65536-5000)%256;
TR0=1;
flag=1;
t0=0;
P1=0xff;
TR1=0;
}
}
}
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);
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
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