#include

#define uchar unsigned char

#define uint unsigned int

sbit dula = P2^6;

sbit wela = P2^7;

sbit key1 = P3^0;

sbit key2 = P3^1;

sbit key3 = P3^2;

sbit key4 = P3^3;

uchar tt,num,bai,shi,ge;

uchar code table[] = {

0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71

};

void init();

void keys();

void delay(uint z);

void display(uchar bai,uchar shi,uchar ge);

void main(){

init();

while(1);

}

void init(){

TMOD = 0x01;

TH0 = (65536 - 1000)/256;

TL0 = (65536 - 1000)%256;

EA = 1;

ET0 = 1;

TR0 = 1;

num = 0;

tt = 0;

bai = 0;

shi = 0;

ge = 0;

wela = 1;

P0 = 0xf8;

wela = 0;

P0 = 0xff;

dula = 1;

P0 = 0x3f;

dula = 0;

delay(5);

}

void time0() interrupt 1 {

TH0 = (65536 - 1000)/256;

TL0 = (65536 - 1000)%256;

tt++;

if(tt == 1) {

num++;

if(num == 99)

bai++;

if(bai == 10){bai = 0;}

if(num == 100){

num = 0;

}

tt = 0;

shi = num/10;

ge = num%10;

display(bai,shi,ge);

keys();

}

}

void keys(){

if(key1 == 0){

delay(5);

if(key1 == 0){

TR0 = 0;

while(!key1)

display(bai,shi,ge);

delay(5);

if(key1 == 1){TR0 = 1;}

}

}

if(key2 == 0){

delay(5);

if(key2 == 0){

TR0 = 0;

while(!key2)

display(bai,shi,ge);

delay(5);

while(!key2);

//display(bai,shi,ge);

while(key2!=0&&key3!=0)

display(bai,shi,ge);

}

}

if(key3 == 0){

delay(5);

if(key3 == 0){

display(bai,shi,ge);

num = shi * 10 + ge;

TR0 = 1;

while(!key3)

display(bai,shi,ge);

delay(5);

while(!key3);

}

}

if(key4 == 0){

delay(5);

if(key4 == 0){

wela = 1;

P0 = 0xf8;

wela = 0;

P0 = 0xff;

dula = 1;

P0 = 0x3f;

dula = 0;

delay(5);

num = -1;

bai = 0;

while(!key4);

delay(5);

while(!key4);

}

}

}

void display(uchar bai,uchar shi,uchar ge){

dula = 1;

P0 = table[bai];

dula = 0;

P0 = 0xff;

wela = 1;

P0 = 0xfe;

wela = 0;

delay(5);

dula = 1;

P0 = table[shi];

dula = 0;

P0 = 0xff;

wela = 1;

P0 = 0xfd;

wela = 0;

delay(5);

dula = 1;

P0 = table[ge];

dula = 0;

P0 = 0xff;

wela = 1;

P0 = 0xfb;

wela = 0;

delay(5);

}

void delay(uint z){

uint x,y;

for(x = z;x > 0;x--)

for(y = 110; y > 0;y--);

}