单片机（51） 多功能秒表的实现

#include

#define uchar unsigned char

#define uint unsigned int

#define PIN0 P0  

#define PIN1 P1 

#define PIN3 P3

sbit start=P2^7; 

sbit reset=P2^6;

sbit add=P2^5;

sbit reduse=P2^4;

uint second=0;   

uint num=0;     

uint num1=0;

uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, 0x7f,0x6f};

uchar code table1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};

uchar code table2[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

void Delayms(uint x){

uint i,j;

for(i=0;i for(j=0;j<123;j++);

}

void Display(uint w,uint a,uint b,uint c,uint d){

PIN3=table2[w];

Delayms(1);

PIN0=table[a]; 

PIN1=0x7f;

Delayms(1);

PIN0=table[b];  

PIN1=0xbf;

Delayms(1);

PIN0=table1[c];  

PIN1=0xdf;  

Delayms(1);

PIN0=table[d];

PIN1=0xef;

Delayms(1);

}

void InitTimer0(){ 

TMOD=0x01;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1;

ET0=1;

TR0=0;

}

void main()

{

uint ms100=0;

uint s,s1,min,min1,minute=0; 

InitTimer0();

while(1)

{

if(add==0){

Delayms(20); 

if(add==0){

minute++;

while(!add);

}

}

if(reduse==0){

Delayms(20); 

if(reduse==0){

minute--;

while(!reduse);

}

}

if(start==0){  

Delayms(20); 

{

if(start==0){ 

TR0=!TR0;

while(!start);

}

}

}

if(reset==0){ 

Delayms(20);

if(reset==0)  

{

num=0;

num1=0;

ms100=0;

second=0;

minute=0;

while(!reset);

}

}

if(num1>=2)

{

num1=0; 

ms100++;

if(ms100>=10) 

{

ms100=0; 

num1=0;

}

}

if(num>=20)

{

num=0;    

second++;

if(second>=60) 

{

second=0;

minute++;

if(minute>=60) 

{

TR0=!TR0;

num1=0;

num=0;

ms100=0;

second=0;

minute=0;

}

}

}

s=second%10; 

s1=second/10;

min=minute%10;

min1=minute/10;

Display(ms100,s,s1,min,min1);  

}

}

void TIMER0()  interrupt 1  

{

TH0=(65536-50000)/256;  

TL0=(65536-50000)%256;

num++;

num1++;

}