單片機源程序如下:
- #include"reg52.h"
- typedef unsigned int u16;
- typedef unsigned char u8;
- u8 num=0;
- u8 buff[2];
- u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
- 0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
- sbit k2=P3^0;
- sbit k1=P3^1;
- sbit p22=P2^2;
- sbit p23=P2^3;
- sbit p24=P2^4;
- void delay(){
- u16 i=100;
- while(i--);
- }
- void digdisplay()
- {
- u8 i;
- for(i=0;i<=1;i++)
- {
- switch(i)
- {
- case 0:p22=0;p23=0;p24=0;break;
- case 1:p22=0;p23=0;p24=1;break;}
- P0=buff[i];
- delay();
- P0=0x00;
-
-
- }
- }
- u8 keyscanf()
- {
- static u8 keyan=1;
- if(keyan==1&&(k1==0||k2==0))
- {
- delay();
- keyan=0;
-
- if(k1==0)return 2;
- else if(k2==0)return 1;
- }
- else if(k1==1&&k2==1){
- keyan=1;
- }
- return 0;
- }
- void datpros()
- {
- if(keyscanf()==1)
- {num++;
- if(num==100){
- num=0;}
- }
- else if(keyscanf()==2)
- {num--;
- if(num==0)
- {
- num=99;}
- }
- buff[0]=smgduan[num%10];
- buff[1]=smgduan[num/10];
- }
- void main()
- {
- while(1){
- datpros();
- digdisplay();
- }
- }
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