test7seg.lst

7段码驱动 用51单片机驱动7段码数码管的源码

C51 COMPILER V7.08   TEST7SEG                                                              03/09/2007 10:38:45 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE TEST7SEG
OBJECT MODULE PLACED IN test7seg.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE test7seg.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /********************************************************************************
   2          *  描述:                                                                       *
   3          *         LED数码管显示演示程序                                                *
   4          *         在8个LED数码管上依次显示1,2,3,4,5,6,7,8                              *
   5          *                                                                              *
   6          *                                                                              *
   7          ********************************************************************************
   8          * 【声明】 此程序仅用于学习与参考，引用请注明版权和作者信息！                  *
   9          *******************************************************************************/
  10          
  11          
  12          #include <reg51.h>
  13          #include <intrins.h>
  14          
  15          unsigned char data dis_digit;
  16          unsigned char code dis_code[11]={0xc0,0xf9,0xa4,0xb0,   // 0, 1, 2, 3
  17                                                      0x99,0x92,0x82,0xf8,0x80,0x90, 0xff};// 4, 5, 6, 7, 8, 9, off 
  18          unsigned char data dis_buf[8];
  19          unsigned char data dis_index;
  20          
  21          void main()
  22          {
  23   1              P0 = 0xff;
  24   1              P2 = 0xff;
  25   1              TMOD = 0x01;
  26   1              TH0 = 0xFC;
  27   1              TL0 = 0x17;
  28   1              IE = 0x82;
  29   1      
  30   1              dis_buf[0] = dis_code[0x1];
  31   1              dis_buf[1] = dis_code[0x2];
  32   1              dis_buf[2] = dis_code[0x3];
  33   1              dis_buf[3] = dis_code[0x4];
  34   1              dis_buf[4] = dis_code[0x5];
  35   1              dis_buf[5] = dis_code[0x6];
  36   1              dis_buf[6] = dis_code[0x7];
  37   1              dis_buf[7] = dis_code[0x8];
  38   1              
  39   1              dis_digit = 0xfe;
  40   1              dis_index = 0;
  41   1              
  42   1              TR0 = 1;
  43   1              while(1);
  44   1      
  45   1      }
  46          
  47          void timer0() interrupt 1
  48          // 定时器0中断服务程序, 用于数码管的动态扫描
  49          // 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
  50          // 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,
  51          //                              选通P2.0口数码管
  52          // dis_buf   --- 显于缓冲区基地址       
  53          {
  54   1              TH0 = 0xFC;
  55   1              TL0 = 0x17;
C51 COMPILER V7.08   TEST7SEG                                                              03/09/2007 10:38:45 PAGE 2   

  56   1              
  57   1              P2 = 0xff;                                                      // 先关闭所有数码管
  58   1              P0 = dis_buf[dis_index];                        // 显示代码传送到P0口
  59   1              P2 = dis_digit;                                         // 
  60   1      
  61   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
  62   1              dis_index++;                                            // 
  63   1                                              
  64   1              dis_index &= 0x07;                      // 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
  65   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)