to.lst

9.9秒表C语言单片机课程设计包含Proteus电路图

C51 COMPILER V7.06   TO                                                                    03/07/2006 23:21:34 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE TO
OBJECT MODULE PLACED IN TO.OBJ
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE TO.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <AT89X51.H> 
   2          unsigned char code table[]={0x3f,0x06,0x5b,0x4f, 
   3                                       0x66,0x6d,0x7d,0x07, 
   4                                       0x7f,0x6f,}; 
   5          unsigned char sec;        //定义计数值，每过1/10秒，sec加一
   6          unsigned char keycnt=0;   
   7          unsigned int tcnt;        //键值判断
   8          
   9          sbit gewei=P2^0;               //个位选通定义
  10          sbit shiwei=P2^1;              //十位选通定义
  11          void Delay(unsigned int tc)     //延时程序
  12          {
  13   1              while( tc != 0 )                        
  14   1              {
  15   2                      unsigned int i;                 
  16   2                      for(i=0; i<100; i++);   
  17   2                      tc--;                                   
  18   2              }
  19   1      }
  20          void LED()                  //LED显示函数
  21          {
  22   1             shiwei=0;
  23   1                 P0=table[sec/10];
  24   1                 Delay(8);
  25   1                 shiwei=1;
  26   1                 gewei=0;
  27   1                 P0=table[sec%10];
  28   1                 Delay(5);  
  29   1                 gewei=1;
  30   1      }
  31          void KEY()          //按键扫描程序
  32          {
  33   1      unsigned char i,j; 
  34   1      if(P3_0==0) 
  35   1        { 
  36   2          for(i=20;i>0;i--) 
  37   2          for(j=248;j>0;j--); 
  38   2          if(P3_0==0) 
  39   2            { 
  40   3              keycnt++; 
  41   3              switch(keycnt)  //按下次数判断
  42   3                { 
  43   4                  case 1:     //第一次按下
  44   4                    TH0=0x06; //对TH0 TL0赋值
  45   4                    TL0=0x06; 
  46   4                    TR0=1;    //开始定时
  47   4                    break; 
  48   4                  case 2:     //第二次按下 
  49   4                    TR0=0;    //定时结束
  50   4                    break; 
  51   4                  case 3:     //第三次按下
  52   4                   keycnt=0;  //重新开始判断键值
  53   4                   sec=0;     //计数重新从零开始
  54   4                    break; 
  55   4                } 
C51 COMPILER V7.06   TO                                                                    03/07/2006 23:21:34 PAGE 2   

  56   3              while(P3_0==0); 
  57   3            } 
  58   2        }
  59   1      }
  60          
  61          void t0(void) interrupt 1 using 0  //定时中断服务函数
  62          { 
  63   1      tcnt++;        //每过250ust tcnt加一
  64   1      if(tcnt==400)  //计满400次（1/10秒）时
  65   1        { 
  66   2          tcnt=0;   //重新再计
  67   2          sec++;    
  68   2          if(sec==100) //定时10秒，在从零开始计时
  69   2            { 
  70   3              sec=0; 
  71   3            } 
  72   2        } 
  73   1      }
  74          void main(void) 
  75          { 
  76   1      TMOD=0x02;  //定时器工作在方式2
  77   1      ET0=1; 
  78   1      EA=1; 
  79   1      sec=0; 
  80   1      while(1) 
  81   1        {   
  82   2            KEY(); 
  83   2                LED();
  84   2                
  85   2        } 
  86   1      } 


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    188    ----
   CONSTANT SIZE    =     10    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      4       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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