- #include<reg52.h>
- #define uint unsigned int
- #define uchar unsigned char
- sbit dula=P2^6;
- sbit wela=P2^7;
- sbit key1=P3^4;
- sbit key2=P3^5;
- sbit key3=P3^6;
- sbit key4=P3^7;
- uchar num1,shi,ge;
- int num;
- uchar code table[]={
- 0x3f,0x06,0x5b,0x4f,
- 0x66,0x6d,0x7d,0x07,
- 0x7f,0x6f,0x77,0x7c,
- 0x39,0x5e,0x79,0x71
- };
- void keyscan();
- void delay(uint);
- void display(uchar);
- void main()
- {
- TMOD=0x11;
- TH0=(65536-45872)/256;
- TL0=(65536-45872)%256;
- EA=1;
- ET0=1;
- TR0=0;
- while(1)
- {
-
- display(num);
- keyscan();
- }
- }
- void keyscan()
- {
- if(key1==0)
- {
- delay(10);
- if(key1==0)
- {
- num++;
- if(num==60)
- num=0;
- while(!key1);
-
- }
- }
- if(key2==0)
- {
- delay(10);
- if(key2==0)
- {
- num--;
- if(num==-1)
- num=59;
- while(!key2);
- }
- }
- if(key3==0)
- {
- delay(10);
- if(key3==0)
- num=0;
- while(!key3);
- }
- if(key4==0)
- {
- delay(10);
- if(key4==0)
- TR0=~TR0;
- while(!key4);
- }
- }
- void display(uchar num)
- {
- shi=num/10;
- ge=num%10;
-
- dula=1;
- P0=table[shi];
- dula=0;
- P0=0xff;
- wela=1;
- P0=0xfe;
- wela=0;
- delay(5);
-
- dula=1;
- P0=table[ge];
- dula=0;
- P0=0xff;
- wela=1;
- P0=0xfd;
- wela=0;
- delay(5);
- }
- void delay(uint xms)
- {
- uint i,j;
- for(i=110;i>0;i--)
- for(j=xms;j>0;j--);
- }
- void T0_time() interrupt 1
- {
- TH0=(65536-45872)/256;
- TL0=(65536-45872)%256;
- num1++;
- if(num1==20)
- {
- num1=0;
- num++;
- if(num==60)
- num=0;
- }
-
- }
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