dtled.lst

at89s51实验例程代码

C51 COMPILER V6.23a  DTLED                                                                 04/06/2005 10:30:04 PAGE 1   


C51 COMPILER V6.23a, COMPILATION OF MODULE DTLED
OBJECT MODULE PLACED IN DTLED.OBJ
COMPILER INVOKED BY: C:\TOOLS\Keil\C51\BIN\C51.EXE DTLED.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*实验名称：动态8字数码管显示
   2            功能：数码管显示123456
   3            作者：http://www.mcuprog.com
   4                  05-02-01
   5          */
   6          
   7          #include <reg51.h>
   8          //LCD的口线
   9          sbit E=P3^5;
  10          sbit RW=P3^6;
  11          sbit RS=P3^7;   
  12          //8字LED的连接方法
  13          //P0.7  P.06    P0.5    P0.4    P0.3    P0.2    P0.1    P0.0
  14          // H      G      F       E       D       C       B       A
  15          
  16          unsigned char code ledcode[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,  
  17                                        0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //数码管段码表
  18          
  19          void Delay_ms(unsigned int t); //延时 t秒钟 ：fosc=12MHz
  20          
  21          void main(void)
  22          {
  23   1              unsigned char led12,led34,led56;
  24   1              E=0;                    //取消LCD对LED的影响
  25   1              RW=0;
  26   1              RS=1;
  27   1              led12=0x12;
  28   1              led34=0x34;
  29   1              led56=0x56;
  30   1              while(1)
  31   1              {
  32   2                      P2=0xff;                //关显示
  33   2                      P0=ledcode[(led12>>4)&0x0f];
  34   2                      P2=0xfe;
  35   2                      Delay_ms(1);
  36   2      
  37   2                      P2=0xff;
  38   2                      P0=ledcode[led12&0x0f];
  39   2                      P2=0xfd;
  40   2                      Delay_ms(1);
  41   2      
  42   2                      P2=0xff;                //关显示
  43   2                      P0=ledcode[(led34>>4)&0x0f];
  44   2                      P2=0xfb;
  45   2                      Delay_ms(1);
  46   2      
  47   2                      P2=0xff;
  48   2                      P0=ledcode[led34&0x0f];
  49   2                      P2=0xf7;
  50   2                      Delay_ms(1);
  51   2      
  52   2                      P2=0xff;                //关显示
  53   2                      P0=ledcode[(led56>>4)&0x0f];
  54   2                      P2=0xef;
  55   2                      Delay_ms(1);
C51 COMPILER V6.23a  DTLED                                                                 04/06/2005 10:30:04 PAGE 2   

  56   2      
  57   2                      P2=0xff;
  58   2                      P0=ledcode[led56&0x0f];
  59   2                      P2=0xdf;
  60   2                      Delay_ms(1);
  61   2              }
  62   1      }
  63          
  64          void Delay_ms(unsigned int t)   //Delay t ms for 12MHz crystal
  65          {unsigned char i;
  66   1       while(t--)
  67   1              {for(i=0;i<125;i++);
  68   2              }
  69   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    200    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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