key.lst

tc35i程序代码是很好的开发短信的程序！ 可以参照一下

C51 COMPILER V7.01  KEY                                                                    12/15/2006 18:48:38 PAGE 1   


C51 COMPILER V7.01, COMPILATION OF MODULE KEY
OBJECT MODULE PLACED IN key.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE key.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          
   2          #include"reg52.h"
   3          #define uchar unsigned char
   4          
   5          
   6          sbit a1=P2^4;
   7          sbit a2=P2^5;
   8          sbit a3=P2^6;
   9          sbit a4=P2^7;
  10          
  11          sbit R1=P3^5;
  12          sbit R2=P3^6;
  13          sbit R3=P3^7;
  14          uchar RR;
  15          void delay()
  16               {uchar i,j;
  17   1            for (i=0;i<200;i++)
  18   1                   {for(j=0x00;j<20;j++) {}  }
  19   1                }
  20          uchar keynum(uchar i)
  21                {uchar j;
  22   1                 j=((0xf0&i)>>4); 
  23   1                 i=i&0x0f;
  24   1                 if (i==0xf) return 0xff;
  25   1                 switch(i)
  26   1                 {case 0x0e: while(a1==0){ P2=0xf0;}; return(j+0x00);//break;
  27   2                  case 0x0d: while(a2==0){ P2=0xf0;}; return(j+0x01);//break;
  28   2                  case 0x0b: while(a3==0){ P2=0xf0;}; return(j+0x02);//break;
  29   2                  case 0x07: while(a4==0){ P2=0xf0;}; return(j+0x03);//break;
  30   2                 }
  31   1                }
  32          uchar keyscan()
  33                {uchar LL;
  34   1                 
  35   1                 R1=0;
  36   1                 R2=0;
  37   1                 R3=0;
  38   1                 P2=0xf0;
  39   1                 //P0=0x30;
  40   1                if((P2&0xf0)!=0xf0)
  41   1                   {delay();
  42   2                        if((P2&0xf0)!=0xf0)
  43   2                         {
  44   3                               R1=0;
  45   3                       R2=1;
  46   3                       R3=1;
  47   3                               if((P2&0xf0)!=0xf0)
  48   3                                 {LL=((P2&0xf0)>>4);
  49   4                                  if (RR!=(0x10|LL))  {RR=0x10|LL; return (keynum(0x10|LL));}         
  50   4                                  else return (0xff);}    
  51   3                               R1=1;
  52   3                       R2=0;
  53   3                       R3=1;
  54   3                               if((P2&0xf0)!=0xf0)
  55   3                                 {LL=((P2&0xf0)>>4);
C51 COMPILER V7.01  KEY                                                                    12/15/2006 18:48:38 PAGE 2   

  56   4                                  if (RR!=(0x50|LL))   {RR=0x50|LL;return (keynum(0x50|LL));}
  57   4                                  else return (0xff);}                            
  58   3                   R1=1;
  59   3                       R2=1;
  60   3                       R3=0;
  61   3                               if((P2&0xf0)!=0xf0)
  62   3                                 {LL=((P2&0xf0)>>4);
  63   4                                  if (RR!=(0x90|LL))  {RR=0x90|LL ;return (keynum(0x90|LL));}
  64   4                                  else return (0xff);}
  65   3                      }          
  66   2               }      
  67   1               else  
  68   1                    {    RR=0xff;
  69   2                    return (0xff);
  70   2                }
  71   1      }
  72          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    233    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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