up51s004.lst

次代码为LED数码显示程序代码

C51 COMPILER V7.08   UP51S004                                                              01/04/2005 16:12:32 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE UP51S004
OBJECT MODULE PLACED IN up51s004.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE up51s004.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2          *                                                                              *
   3          *    File       : uP51s004.asm                                                   *
   4          *    Date       : 2004-9-5                                                     *
   5          *    Version    : 1.0                                                          *
   6          *                                                                              *
   7          *    Author     : kevin           [e-mail]                               *
   8          *    Company    : Http://www.dz51.com                                          *
   9          *                                                                              *
  10          ********************************************************************************
  11          *    Description:                                                              *
  12          *                 LED数码管显示演示程序                                        *
  13          *                 在4个LED数码管上依次显示1,2,3,4,5,6,7,8                      *
  14          *                                                                              *
  15          *                                                                              *
  16          *                                                                              *
  17          *******************************************************************************/
  18          #include <reg51.h>
  19          #include <intrins.h>
  20          #define bit(x) 1<<x
  21          unsigned char data dis_digit;
  22          unsigned char code dis_code[11]={0xc0,0xf9,0xa4,0xb0,   // 0, 1, 2, 3
  23                                          0x99,0x92,0x82,0xf8,0x80,0x90, 0xff};// 4, 5, 6, 7, 8, 9, off 
  24          unsigned char data dis_buf[4];
  25          unsigned char data dis_index;
  26          
  27          void main()
  28          {
  29   1              P0 = 0xff;
  30   1              P2 = 0xff;
  31   1              TMOD = 0x01;
  32   1              TH0 = 0xFC;
  33   1              TL0 = 0x17;
  34   1              IE = 0x82;
  35   1      
  36   1              dis_buf[0] = dis_code[0x1];
  37   1              dis_buf[1] = dis_code[0x2];
  38   1              dis_buf[2] = dis_code[0x3];
  39   1              dis_buf[3] = dis_code[0x4];
  40   1      
  41   1              
  42   1              dis_digit = 0xfe;
  43   1              dis_index = 0;
  44   1              
  45   1              TR0 = 1;
  46   1              while(1);
  47   1      
  48   1      }
  49          
  50          void timer0() interrupt 1
  51          // 定时器0中断服务程序, 用于数码管的动态扫描
  52          // dis_index --- 显示索引, 用于标识当前显示的数码管和缓冲区的偏移量
  53          // dis_digit --- 位选通值, 传送到P2口用于选通当前数码管的数值, 如等于0xfe时,
  54          //                              选通P2.0口数码管
  55          // dis_buf   --- 显于缓冲区基地址       
C51 COMPILER V7.08   UP51S004                                                              01/04/2005 16:12:32 PAGE 2   

  56          {
  57   1              TH0 = 0xFC;
  58   1              TL0 = 0x17;
  59   1              
  60   1              P2 = 0xff;                                                      // 先关闭所有数码管
  61   1              P0 = dis_buf[dis_index];                        // 显示代码传送到P0口
  62   1              P2 = dis_digit;                                         // 
  63   1              dis_digit = _crol_(dis_digit,1);        // 位选通值左移, 下次中断时选通下一位数码管
  64   1      
  65   1              dis_index++;                                            // 
  66   1              dis_index &= 0x03;                      // 8个数码管全部扫描完一遍之后，再回到第一个开始下一次扫描
  67   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    108    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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