t0.lst

at89s51实验例程代码

C51 COMPILER V6.23a  T0                                                                    04/06/2005 10:38:05 PAGE 1   


C51 COMPILER V6.23a, COMPILATION OF MODULE T0
OBJECT MODULE PLACED IN T0.OBJ
COMPILER INVOKED BY: C:\TOOLS\Keil\C51\BIN\C51.EXE T0.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*实验名称：定时中断0
   2            功能：利用定时器,产生秒计数器,使数码管从000计到999
   3            作者：http://www.mcuprog.com
   4                  05-02-01
   5          */
   6          #include <reg51.h>
   7          //LCD的口线
   8          sbit E=P3^5;
   9          sbit RW=P3^6;
  10          sbit RS=P3^7;   
  11          //8字LED的连接方法
  12          //P0.7  P.06    P0.5    P0.4    P0.3    P0.2    P0.1    P0.0
  13          // H      G      F       E       D       C       B       A
  14          
  15          unsigned char code ledcode[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,  
  16                                        0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //数码管段码表
  17          unsigned char js100ms,jsgw,jssw,t0100ms,t0sm;
  18          
  19          void time0(void);
  20          
  21          void main(void)
  22          {
  23   1              E=0;                    //取消LCD对LED的影响
  24   1              RW=0;
  25   1              RS=1;
  26   1              
  27   1              js100ms=0x00;
  28   1              jsgw=0x00;
  29   1              jssw=0x00;
  30   1              t0100ms=0x14;
  31   1              t0sm=0x01;                      //从第一个LED开始显示
  32   1              TH0=0xee;
  33   1              TL0=0x00;
  34   1              TMOD=0x01;
  35   1              TR0=1;
  36   1              IE=0x82;
  37   1              while(1)
  38   1              {}      
  39   1      }
  40          
  41          void time0(void) interrupt 1
  42          {
  43   1              TH0=0xee;
  44   1              TL0=0x00;
  45   1              t0100ms--;
  46   1              if(t0100ms==0x00)
  47   1              {
  48   2                      t0100ms=0x14;
  49   2                      js100ms++;
  50   2                      if(js100ms==0x0a)
  51   2                      {
  52   3                              js100ms=0x00;
  53   3                              jsgw++;
  54   3                              if(jsgw==0x0a)
  55   3                              {
C51 COMPILER V6.23a  T0                                                                    04/06/2005 10:38:05 PAGE 2   

  56   4                                      jsgw=0x00;
  57   4                                      jssw++;
  58   4                                      if(jssw==0x0a)
  59   4                                      {jssw=0x00;}
  60   4                              }
  61   3                      }
  62   2              }
  63   1              t0sm++;
  64   1              if(t0sm==0x04)
  65   1              {t0sm=0x01;}
  66   1              P0=0xff;
  67   1              switch(t0sm)
  68   1              {
  69   2                      case 0x01:      { P2=0xdf;P0=ledcode[js100ms];}break;
  70   2                      case 0x02:      { P2=0xef;P0=ledcode[jsgw]&0x7f;}break;
  71   2                      case 0x03:  { P2=0xf7;P0=ledcode[jssw];}break;
  72   2                      default:        break;
  73   2              }
  74   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    152    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      5    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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