定时煮饭.c

该程序主要是通过时间控制电饭锅煮饭,通过键盘可设定时间,等时间到,就代表煮饭成功

#include"reg52.h"
#include<absacc.h>

#define uchar unsigned char 
#define uint  unsigned int
sbit P3_3=P3^3 ;
sbit CALL=P3^1 ;
sbit P3_2=P3^2 ;
sbit P1_0=P1^0 ;
uint  table1[]={1,2,3,25,4,5,6,25 ,7,8,9,25 ,25 ,0,25 ,25,};

uchar  table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6F};
code char key_code[]={0x77,0xb7,0xd7,0xe7,
                      0x7b,0xbb,0xdb,0xeb,
                      0x7d,0xbd,0xdd,0xed,
		              0x7e,0xbe,0xde,0xee};

code ksp[4]={0x7f,0xbf,0xdf,0xef};
uint one,two,m;			

main()
{//uint one,two,m;
 uint ch;
 uchar a,b;
 char gotkey();
 void display(uint ,uint );
 char keypad_scan();
 void delay();

 while(gotkey()!=3);
 while((b=gotkey())==3);
 ch=b;
 one=table1[ch];
 while(gotkey()!=7);
 while((a=gotkey())==7);
 ch=a;
 two=table1[ch];
 m=one*10+two ;

 TMOD=0x11;
 TH0=0x4c;
 TL0=0x00;
 EA=1;
 TR0=1;
 ET0=1;
  
 		   				 
while(1)
{  
 display(two,one);
 }

 while(1);
}
  

void int0() interrupt 1 using 1
{
 uint count0;
 count0++;
 if(count0==30)
  {count0=0; 
   m--;
   if(m)
   {one=m/10;
   two=m%10;
   }
   else 
      {CALL  =0; //饭熟报警
       one=0;two=0;
       ET0=0;    
      }
   } 
  P1_0=!P1_0;
 TH0=0x4c;
 TL0=0x00;			   
} 

void display(uint two,uint one)

{P3_3=0;P3_2=1;
 P0=table[two];
 delay();
 P0=0x00;
 P3_3=1;P3_2=0;
 P0=table[one];
 delay();
 P0=0x00;
}


void delay (void) 
 {                   /* 时间延迟函数 */
  unsigned char i,j;                  
     for (i=0;i<5;i++)
          for(j=0;j<255;j++);
          
 }

char keypad_scan()
{
    char key,i;
    P2=0xf0;
    while (P2!=0xf0);
      do{
       for(i=0;i<=3;i++)
       {         
           P2=ksp[i];
           if(P2!=ksp[i])
           {
              delay();
              key=P2;
              if(key!=ksp[i])
              {
                  return(key);
              }
           }
       }
    } while(1);
}

// 检查是否有按键按下
char gotkey()
{
     char temp,i;
     temp=keypad_scan();
     for (i=0;i<=15;i++) {
          if(temp==key_code[i]) return(i);
     }
     return(16);
}