C51 COMPILER V7.08   WL004                                                                 02/12/2004 11:44:43 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE WL004
OBJECT MODULE PLACED IN wl004.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE wl004.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2          *                                                                              *
   3          *    File       : wl004.c                                                      *
   4          *    Date       : 2004-1-5                                                     *
   5          *    Version    : 1.0                                                          *
   6          *                                                                              *
   7          *    Author     : Freeman          freeman@willar.com                          *
   8          *    Company    : Willar           www.willar.com                              *
   9          *                                                                              *
  10          ********************************************************************************
  11          *    Description:                                                              *
  12          *                 LED數碼管顯示演示程序                                        *
  13          *                 在8個LED數碼管上依次顯示1,2,3,4,5,6,7,8                      *
  14          *                                                                              *
  15          *                                                                              *
  16          *                                                                              *
  17          *******************************************************************************/
  18          #include <reg51.h>
  19          #include <intrins.h>
  20          
  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[8];
  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              dis_buf[4] = dis_code[0x5];
  41   1              dis_buf[5] = dis_code[0x6];
  42   1              dis_buf[6] = dis_code[0x7];
  43   1              dis_buf[7] = dis_code[0x8];
  44   1              
  45   1              dis_digit = 0xfe;
  46   1              dis_index = 0;
  47   1              
  48   1              TR0 = 1;
  49   1              while(1);
  50   1      
  51   1      }
  52          
  53          void timer0() interrupt 1
  54          // 定時器0中斷服務程序, 用于數碼管的動態掃描
  55          // dis_index --- 顯示索引, 用于標識當前顯示的數碼管和緩沖區的偏移量
C51 COMPILER V7.08   WL004                                                                 02/12/2004 11:44:43 PAGE 2   

  56          // dis_digit --- 位選通值, 傳送到P2口用于選通當前數碼管的數值, 如等于0xfe時,
  57          //                              選通P2.0口數碼管
  58          // dis_buf   --- 顯于緩沖區基地址       
  59          {
  60   1              TH0 = 0xFC;
  61   1              TL0 = 0x17;
  62   1              
  63   1              P2 = 0xff;                                                      // 先關閉所有數碼管
  64   1              P0 = dis_buf[dis_index];                        // 顯示代碼傳送到P0口
  65   1              P2 = dis_digit;                                         // 
  66   1      
  67   1              dis_digit = _crol_(dis_digit,1);        // 位選通值左移, 下次中斷時選通下一位數碼管
  68   1              dis_index++;                                            // 
  69   1                                              
  70   1              dis_index &= 0x07;                      // 8個數碼管全部掃描完一遍之后，再回到第一個開始下一次掃描
  71   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    128    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     10    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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