#include
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={ //編碼表 code為把程序放入ROM區(qū)
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x76,0x79,0x38,0x3f,0};
uchar temp,t0,t1,bai,shi,ge,flag,flag1; //flag flag1 為2個(gè)標(biāo)志位
uint shu;
void init();
void display(uchar,uchar,uchar,uchar,uchar,uchar);
void delay(uint z)
{
uint t1,y;
for(t1=z;t1>0;t1--)
for(y=110;y>0;y--);
}
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;
TMOD=0x11;//初始化這里用了2個(gè)定時(shí)器
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
TH1=(65536-50000)/256;
TL1=(65536-50000)%6;
EA=1;
ET0=1;
ET1=1;
TR0=1;
TR1=1;
}

void timer0() interrupt 1 //timer0 定時(shí)到處理函數(shù) 中斷處理函數(shù)
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
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 //timer1的定時(shí)處理函數(shù)， 中斷處理函數(shù)
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%6;
t1++;
if(t1==2)
{
t1=0;
shu--;
bai=shu/100;
shi=shu0/10;
ge=shu;
if(shu==398)
{
TR0=0;
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
TR0=1;
flag=1;
t0=0;
P1=0xff;
TR1=0;
}
}
}

void display(uchar aa,uchar bb,uchar cc,uchar ba,uchar sh,uchar g)
{
dula=1;
P0=table[aa];
dula=0;
P0=0xff;//防止位選的時(shí)候其他幾個(gè)數(shù)碼管有殘影 0xff都關(guān)掉了，在賦值位選
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[ba];
dula=0;
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
delay(1);

dula=1;
P0=table[sh];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
delay(1);

dula=1;
P0=table[g];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
delay(1);
}

以上代碼來(lái)源于網(wǎng)絡(luò)，僅供參考，我看了遍覺(jué)得可以學(xué)學(xué)。