main.lst

从零开始学51单片机源代码

C51 COMPILER V8.08   MAIN                                                                  04/08/2012 22:08:24 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          //main.c
   2          #include <reg51.h>      //包含头文件
   3          
   4           //定义端口寄存器
   5          sfr P0M0 = 0X93;
   6          sfr P0M1 = 0X94;
   7          sfr P1M0 = 0X91;
   8          sfr P1M1 = 0X92;
   9          sfr P2M0 = 0X95;
  10          sfr P2M1 = 0X96;  
  11          sfr P3M0 = 0Xb1;
  12          sfr P3M1 = 0Xb2;    
  13          
  14          //定义延时函数
  15          void ms_delay(unsigned int t)
  16          {
  17   1              unsigned  int  i;
  18   1              for (t; t > 0; t--)     //外层循环t次    
  19   1                      for (i = 110;i > 0; i--)        //内层循环110次            
  20   1                      ;
  21   1      }  
  22          
  23          main()
  24          {
  25   1              int num = 0;
  26   1      
  27   1              //配置端口模式 
  28   1              P1M1 = 0x00;
  29   1              P1M0 = 0x00;   
  30   1              
  31   1              P1 = 0xff;      //P1.0 - P1.2部关闭     
  32   1              while(1)
  33   1              {
  34   2                      switch (num)
  35   2                      {
  36   3                              case 0: 
  37   3                                      P1 = 0xff;      //P1.0 - P1.2全部关闭   
  38   3                                      break;
  39   3                              case 1:
  40   3                                      P1 = 0xfe;      //打开P1.0
  41   3                                      break;
  42   3                              case 2:
  43   3                                      P1 = 0xfd;      //打开P1.1
  44   3                                      break;
  45   3                              case 3:
  46   3                                      P1 = 0xfc;      //打开P1.0、P1.1
  47   3                                      break;
  48   3                              case 4:
  49   3                                      P1 = 0xfb;      //打开P1.2
  50   3                                      break;
  51   3                              case 5:
  52   3                                      P1 = 0xfa;      //打开P1.2和P1.0
  53   3                                      break;
  54   3                              case 6:
  55   3                                      P1 = 0xf9;      //打开P1.2和P1.1
C51 COMPILER V8.08   MAIN                                                                  04/08/2012 22:08:24 PAGE 2   

  56   3                                      break;
  57   3                              case 7:
  58   3                                      P1 = 0xf8;      //全开
  59   3                                      break;
  60   3                              default:        
  61   3                                      P1 = 0xff;      //P0.0 - P0.2全部关闭   
  62   3                      }
  63   2                      ms_delay(1000);
  64   2                      num ++;
  65   2                      if (num > 4)
  66   2                              num = 0;        
  67   2              }
  68   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    148    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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