1keymfuc.c

一键多功能程序

#include"reg51.h"
#include"stdio.h"
sbit P3_7=P3^7;
sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_2=P1^2;
sbit P1_3=P1^3;
#define uchar unsigned char
#define uint unsigned int
uchar ID;
init()
{
 ID=0;
 P1=0xff;
}

delay(uint i)
{ 
 uint j;
 for(;i>0;i--)
  for(j=0;j<110;j++);
  
}

void main()
 {
  init();  
  while(1)
  {
  if(P3_7==0)
   {
    delay(10);
     if(P3_7==0)
      {
       ID++;
       if(ID>3)
        ID=0;
      }
     while(P3_7==0);
   } 

switch(ID)
{
 case 0: 
  
   delay(100);
   P1_0=~P1_0; 
   break;   
  
  case 1: 
  
   delay(100);
   P1_1=~P1_1;
   break;   
  
  case 2: 
  
   delay(100);
   P1_2=~P1_2;
   break;   
  
  case 3: 
   delay(100);
   P1_3=~P1_3;
   break; 
  
  default:break;
  
 }
 }
}