led_6.lst

51单片机实验例程

C51 COMPILER V7.10   LED_6                                                                 10/29/2009 00:13:19 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE LED_6
OBJECT MODULE PLACED IN LED_6.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE LED_6.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /********************************************************************************
   2          ;*                                                                                  *
   3          ;                                                                                                                                                               *
   4          ;     延时实现LED流水灯效果   p2口八个灯作跑马灯。采用了寄存器存中间数          *
   5          ;     连接方法： JP11（P2）和JP1(LED灯) 用8PIN排线连接起来                                          *
   6          ;********************************************************************************/
   7          
   8          
   9          #include <reg52.h>
  10          void delay(unsigned int i);  //声明延时函数
  11          char LED;
  12          
  13          
  14          main()
  15          { 
  16   1        unsigned char i;
  17   1        
  18   1        while (1) 
  19   1        {      LED = 0xfe;
  20   2                 
  21   2                 for (i = 0 ;i < 8 ; i++)
  22   2                { 
  23   3                 P2  = LED;
  24   3                 delay(500);
  25   3                 LED = LED << 1;          // 左移
  26   3                 LED = LED | 0x01;    // 移位后，后面的位为高电平
  27   3                 if (LED == 0x7f)      break;
  28   3                 }
  29   2              
  30   2                 for (i = 0 ;i < 8 ; i++)
  31   2                 {
  32   3                       
  33   3                        P2  = LED;
  34   3                        delay(500);
  35   3                        LED = LED >> 1;        // 右移
  36   3                        LED = LED | 0x80;      // 移位后，后面的位为高电平
  37   3                 
  38   3                 }
  39   2      
  40   2         }
  41   1       
  42   1      }
  43          
  44          
  45          /*******延时函数*************/
  46          void delay(unsigned int i)
  47          {
  48   1          unsigned char j;
  49   1          for(i; i > 0; i--)
  50   1              for(j = 255; j > 0; j--);
  51   1      
  52   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
C51 COMPILER V7.10   LED_6                                                                 10/29/2009 00:13:19 PAGE 2   

   CODE SIZE        =     88    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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