mcs51单片机使用串口进行通信

C51 COMPILER V7.07   _笃谥_砡序                                                            11/19/2008 13:07:00 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE _笃谥_砡序
OBJECT MODULE PLACED IN 后期主程序.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE 后期主程序.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #define uchar unsigned char 
   2          
   3          #include "string.h" 
   4          
   5          #include "reg51.h" 
   6          sbit P1_0=P1^0;
   7          sbit P2_7=P2^7;
   8          sbit P2_5=P2^5;
   9          sbit P1_7=P1^7;
  10          sbit P1_1=P1^1;
  11          
  12          void SendData(uchar Dat) 
  13          
  14          {       uchar i=0; 
  15   1      
  16   1              SBUF=Dat; 
  17   1      
  18   1              while(1 == 1){ 
  19   2                      if(TI == 1)     
  20   2                      {        
  21   3                              TI=0;
  22   3                               break;
  23   3                      }
  24   2              }
  25   1       
  26   1      
  27   1      } 
  28          
  29          void mDelay(unsigned int DelayTime) 
  30          { unsigned char j=0; 
  31   1      
  32   1              for(;DelayTime>0;DelayTime--) 
  33   1              { 
  34   2                      for(j=0;j<125;j++) 
  35   2                      {;}     
  36   2              } 
  37   1      
  38   1      } 
  39          
  40          uchar Key() 
  41          {                
  42   1              uchar row,colum;
  43   1              P2 = 0x0f;
  44   1              if( P2 != 0x0f)
  45   1              {
  46   2                      if(P2 == 0x07) row = 0;
  47   2                      if(P2 == 0x0b) row = 1;
  48   2                      if(P2 == 0x0d) row = 2;
  49   2                      if(P2 == 0x0e) row = 3;
  50   2      
  51   2                      P2 = 0xf0;
  52   2                      if(P2 != 0xf0)
  53   2                      {
  54   3                              if(P2 == 0x70) colum = 0;
  55   3                              if(P2 == 0xb0) colum = 1;
C51 COMPILER V7.07   _笃谥_砡序                                                            11/19/2008 13:07:00 PAGE 2   

  56   3                              if(P2 == 0xd0) colum = 2;
  57   3                              if(P2 == 0xe0) colum = 3;
  58   3                              
  59   3                              P2 = 0x0f;
  60   3                              while(P2 != 0x0f);
  61   3                              return (row*4+colum);
  62   3                      }
  63   2                      else 
  64   2                              return (0xff);
  65   2              }
  66   1      
  67   1              return(0xff); 
  68   1      } 
  69          
  70          void main() 
  71          
  72          { 
  73   1                      uchar KeyValue[4],pos,i,j; 
  74   1                      uchar identify[4];
  75   1                      uchar send;
  76   1                      uchar Get;
  77   1                      P1=0x00;                //关闭 
  78   1      
  79   1                      TMOD=0x20;              //确定定时器工作模式 
  80   1                      TH1=0xe8; 
  81   1                      TL1=0xe8;               //定时初值 
  82   1                      PCON&=0x80;             //SMOD=1 
  83   1                      TR1=1;                          //开启定时器 1
  84   1                      SCON=0x40;               //串口工作方式 1 
  85   1                      REN=1;                          //允许接收 
  86   1                      RI = 0;
  87   1                      P2_7=0;
  88   1                      P2_5=1;
  89   1      
  90   1              
  91   1      
  92   1                      //工作循环
  93   1                      P2_7=0;
  94   1                      P2_5=0;
  95   1      
  96   1                      for(;;) 
  97   1                      { 
  98   2                                      
  99   2                                      P1_7=1;
 100   2                                      mDelay(0x01);
 101   2                                      SendData(0x04);
 102   2                                      mDelay(0x01);
 103   2                                      P1_7=0;
 104   2                                      mDelay(0xff);mDelay(0xff);
 105   2      
 106   2                                      if(RI)
 107   2                                      {
 108   3                                              Get = SBUF;
 109   3                                              SendData(Get);
 110   3                                              P1_0=1;
 111   3                                              P1_1=0;
 112   3                                              RI = 0;
 113   3                                      }
 114   2      
 115   2                              mDelay(0xff);mDelay(0xff);
 116   2                              
 117   2      
C51 COMPILER V7.07   _笃谥_砡序                                                            11/19/2008 13:07:00 PAGE 3   

 118   2                      } 
 119   1      
 120   1      } 
*** WARNING C280 IN LINE 73 OF 后期主程序.C: 'KeyValue': unreferenced local variable
*** WARNING C280 IN LINE 73 OF 后期主程序.C: 'pos': unreferenced local variable
*** WARNING C280 IN LINE 73 OF 后期主程序.C: 'i': unreferenced local variable
*** WARNING C280 IN LINE 73 OF 后期主程序.C: 'j': unreferenced local variable
*** WARNING C280 IN LINE 74 OF 后期主程序.C: 'identify': unreferenced local variable
*** WARNING C280 IN LINE 75 OF 后期主程序.C: 'send': unreferenced local variable


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    218    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      13
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  6 WARNING(S),  0 ERROR(S)