lesson5_2.lst

按键处理程序

C51 COMPILER V6.12  LESSON5_2                                                              01/27/2007 09:58:32 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE LESSON5_2
OBJECT MODULE PLACED IN .\lesson5_2.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil\C51\BIN\C51.EXE .\lesson5_2.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg52.h>
   2          sbit key1=P3^4;
   3          sbit key2=P3^5;
   4          sbit key3=P3^6;
   5          sbit key4=P3^7;
   6          sbit light1=P1^7;
   7          sbit dula=P2^6;
   8          sbit wela=P2^7;
   9          #define uchar unsigned char
  10          #define uint unsigned int
  11          uchar code table[]={
  12          0x3f,0x06,0x5b,0x4f,0x66,0x6d,
  13          0x7d,0x07,0x7f,0x6f,0x77};
  14          uchar num,nn;
  15          display(uchar );
  16          delay(uchar);
  17          uchar scan();
  18          void main()
  19          {
  20   1      	while(1)
  21   1      	{
  22   2      		nn=scan();
  23   2      		display(nn);
  24   2      	}
  25   1      }
  26          
  27          display(uchar num1)
  28          {
  29   1      	P0=table[num1];
  30   1      	dula=1;
  31   1      	dula=0;	
  32   1      	P0=0xc0;
  33   1      	wela=1;
  34   1      	wela=0;
  35   1      }
  36          
  37          delay(uchar x)
  38          {
  39   1      	uchar a,b;
  40   1      	for(a=x;a>0;a--)
  41   1      	 for(b=200;b>0;b--);
  42   1      }
  43          
  44          uchar scan()
  45          {
  46   1      		if(key1==0)
  47   1      		   {
  48   2      			 delay(50);	 
  49   2      			if(key1==0)
  50   2      			   num=4;
  51   2      			 while(!key1);
  52   2       		   }
  53   1      
  54   1      		if(key2==0)
  55   1      		   {
C51 COMPILER V6.12  LESSON5_2                                                              01/27/2007 09:58:32 PAGE 2   

  56   2      			 delay(50);	 
  57   2      			if(key2==0)
  58   2      			 num=5;
  59   2      			 while(!key2);
  60   2       		   }
  61   1      
  62   1      		if(key3==0)
  63   1      		   {
  64   2      			 delay(50);	 
  65   2      			if(key3==0)
  66   2      			 num=6;
  67   2      			 while(!key3);
  68   2       		   }
  69   1      
  70   1      		if(key4==0)
  71   1      		   {
  72   2      			 delay(50);	 
  73   2      			if(key4==0)
  74   2      			 num=7;
  75   2      			 while(!key4);
  76   2       		   }
  77   1      		return num;
  78   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    114    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)