数码管演示.lst

51单片机开发板提供的参考程序

C51 COMPILER V7.06   数码_苎菔_                                                            10/09/2008 22:56:28 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 数码_苎菔_
OBJECT MODULE PLACED IN 数码管演示.OBJ
COMPILER INVOKED BY: d:\Keil2\C51\BIN\C51.EXE 数码管演示.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*copyright 2007,ShangHai  HaoTun Electronic Technology co.,Ltd
   2           *
   3           *This sample is used for 7-seg led dynamic display .
   4           *
   5           *write by Shifang 2007-4-23
   6           *
   7           *V1.1
   8           */
   9          
  10          #include <reg52.h>
  11          
  12          unsigned char const dofly[]={0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80};// 显示数值表 12345678
  13                                                                                //8位数码管显示12345678
  14          unsigned char code seg[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//分别对应相应的数码管点亮
  15          ////////////////////////////////////////////////////////
  16          void delay(unsigned int cnt)
  17          {
  18   1       while(--cnt);
  19   1      }
  20          ///////////////////////////////////////////////////////
  21          main()
  22          {
  23   1       unsigned char i;
  24   1      
  25   1       while(1)
  26   1            {
  27   2       
  28   2             P0=dofly[i];//取显示数据
  29   2                 P2=seg[i];  //取段码
  30   2                 delay(30000); //扫描间隙延时,这个时间比较长，用于演示动态扫描
  31   2                               //缩短这个时间，利用人眼的暂留效应我们就可以看到
  32   2                                               //类似静态的显示了
  33   2                 
  34   2                 i++;
  35   2                 if(8==i)
  36   2                   i=0;
  37   2            }
  38   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     45    ----
   CONSTANT SIZE    =      8    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      8       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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