text1.lst

51单片机项目集

C51 COMPILER V8.02   TEXT1                                                                 11/05/2010 20:25:15 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE TEXT1
OBJECT MODULE PLACED IN Text1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Text1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /**************************************************************************/
   2          //            通过定时器中断，实现六位数码管的动态显示
   3          /**************************************************************************/
   4          #include<reg51.h>
   5          #define uchar unsigned char
   6          #define uint unsigned int
   7          uchar j = 0, sec,min,hour;
   8          uint i;
   9          bit flash;
  10          sbit dop = P0^7;   //小数点段
  11          code uchar seven_seg[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
  12          code uchar seven_bit[] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
  13          void timer0_init(void)    //初始化
  14          {
  15   1              TMOD = 0x01;
  16   1              TH0 = 0xf8;           //(65536 - 2000)/ 256;
  17   1              TL0 = 0x30;           //(65536 - 2000)% 256;
  18   1              TR0 = 1;
  19   1              EA  = 1;
  20   1              ET0 = 1;
  21   1      }
  22          void timer0_isr(void) interrupt 1                 //中断
  23          {
  24   1              TR0 = 0;
  25   1              EA = 0;
  26   1              TH0 = 0xf8;
  27   1              TL0 = 0x30;
  28   1              TR0 = 1;
  29   1              EA = 1;
  30   1              P0 = 0xff;              //让数码管不显示内容，防止信号串扰
  31   1              i++;
  32   1              if(i >= 500)    //刚好1秒
  33   1              {
  34   2                      i = 0;
  35   2                      sec++;
  36   2                      flash = !flash; //2秒改变一次状态，如果想让flash1秒改变一次状态怎样做？
  37   2              }
  38   1              if(sec >= 60)
  39   1              {
  40   2                      sec = 0;
  41   2                      min++;
  42   2              }
  43   1              if(min >= 60)
  44   1              {
  45   2                      min = 0;
  46   2                      hour++;
  47   2              }
  48   1              if(hour >= 24)
  49   1                      hour = 0; 
  50   1              switch(j)
  51   1              {
  52   2                      case 0: P0 = seven_seg[sec % 10]; break;        //显示秒个位
  53   2                      case 1: P0 = seven_seg[sec / 10]; break;
  54   2                      case 2: P0 = seven_seg[min % 10];dop = flash;break; 
  55   2                      case 3: P0 = seven_seg[min / 10]; break;
C51 COMPILER V8.02   TEXT1                                                                 11/05/2010 20:25:15 PAGE 2   

  56   2                      case 4: P0 = seven_seg[hour % 10];dop = flash; ;break;
  57   2                      case 5: P0 = seven_seg[hour / 10]; break;       
  58   2              }
  59   1              P2 = seven_bit[j];      //每中断一次只显示一位数码管，显示停留时间为中断间隔
  60   1              j ++;
  61   1              if(j >= 6)      
  62   1              j=0;  //循环变量清零
  63   1      }
  64          void main(void)
  65          {
  66   1              sec = 30;
  67   1              min = 30;
  68   1              hour = 8;
  69   1              P2 = 0xff;
  70   1              timer0_init();
  71   1              while(1);
  72   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    235    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


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