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Microcontroller Learning - Independent Button 2

Publisher:yanfeng00Latest update time:2016-01-20 Source: eefocus Reading articles on mobile phones Scan QR code
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Title: The first three digits of the digital tube display a stopwatch, running from 000 to 999 at a speed of 0.01 seconds. When an independent button is pressed, the stopwatch stops, and the second button starts counting, and the third button resets the count value and starts from the beginning. (Using timer interrupt method)
Solution: (C language programming)
#include
#include
#define uint unsigned int
#define uchar unsigned char
uchar bai,shi,ge,num;
uint shu;
sbit s=P1^0;
sbit s2=P1^1;
sbit s3=P1^2;
sbit le=P3^6;
void delay(uint a);
void dis();
void display(uchar ba,uchar sh,uchar g);
uchar code tabledu[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,
0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x89,0x86,0xc7,0xc7,0xc0,0xff};
uchar code tablewe[]={0xff,0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x 7f};
void init()
{
 shu=0;
 bai=0;
 shi=0;
 ge=0;
 TMOD=0x11;
 TH0=0xd8;
 TL0=0xf0;
 EA=1;
 ET0=1;
 TR0=1;
}
void main()
{
 init();
 while(1){   
  if(s==0){
   delay(5);
   if(s==0){
      TR0=0;
    dis();
    }
   }
  if(s2==0){
   delay(5);
   if(s2==0){
      TR0=1;
    dis();
    }
   }
    if(s3==0){
   delay(5);
   if(s3==0){
      TR0=1;
    shu=0;
    dis();
    }
   }
  dis();
 }
}
void time0() interrupt 1
{
 TH0=0xd8;
 TL0=0xf0;
 num++;
 shu++;
 999)
    shu=0;
 bai=shu/100;
 shi=shu%100/10;
 ge=shu%10; 
}
void display(uchar ba,uchar sh,uchar g)
{
 le=1;
 P2=tablewe[1];
 le=0;
 le=1; P0
 =tabledu[ba] ; le=0
 ;
 delay(5); le=1; P0=tabledu[sh]; le=0; delay(5); le =1; P2=tablewe[3]; le = 0 ; le=1; , ge ) ; }  } void delay (uint a) { uint i,j; for ( j=a;j> 0 ; j--) for ( i = 250;i>0;i-- ) ; }
 
 
 
 
 
 
 
 
 
 
 
 
 
 



 
     
      
     
    
     
      
     
    
     
      
      
     


 
 
    

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