frequency.lst

基于51单片机的数字频率计

C51 COMPILER V8.02   FREQUENCY                                                             04/26/2009 16:31:58 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE FREQUENCY
OBJECT MODULE PLACED IN frequency.OBJ
COMPILER INVOKED BY: E:\Program Files\keil\C51\BIN\C51.EXE frequency.c ROM(SMALL) BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<regx52.h>
   2          #include<intrins.h>
   3          #define uint unsigned int 
   4          #define uchar unsigned char
   5          unsigned char code dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//共阴数码管
   6          unsigned char code dispcode[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//显示0-9
   7          unsigned char count[8]={0,0,0,0,0,0,0,0};
   8          unsigned int T0count=0;
   9          unsigned char  time1tick=0;
  10          unsigned char i=0;
  11          unsigned long  x;//该开始定义unsigned int，结果超出了范围，因为int的最大是65536
  12          void pulse_init(void)
  13          {
  14   1              TMOD=0x16;//T0工作在方式2，计数器模式
  15   1              TH0=0x00;
  16   1              TL0=0x00;
  17   1              TH1=0xb1;//20ms中断一次
  18   1              TL1=0xe0;
  19   1              ET0=1;
  20   1              ET1=1;
  21   1              EA=1;
  22   1      
  23   1      }
  24          void delay(uint ms)
  25          {
  26   1              unsigned char i,j;
  27   1              for(i=0;i<ms;i++)
  28   1                      for(j=0;j<250;j++)
  29   1                      {
  30   2                              _nop_();
  31   2                              _nop_();
  32   2                              _nop_();
  33   2                              _nop_();
  34   2                      }
  35   1      }
  36          static void time0_int(void) interrupt 1 using 0
  37          {
  38   1      
  39   1              T0count++;      //T0为计数器模式
  40   1      }
  41          
  42          void t1(void) interrupt 3 using 0
  43          {       
  44   1      
  45   1                      time1tick++;
  46   1                      TH1=0xb1;//20ms中断一次
  47   1                      TL1=0xe0;
  48   1                      if(time1tick==50)//定时1s
  49   1                      {
  50   2                          time1tick=0;
  51   2                              TR0=0;
  52   2                              TR1=0;//T1为定时器模式
  53   2                              EA=0;
  54   2                      }   
  55   1              
C51 COMPILER V8.02   FREQUENCY                                                             04/26/2009 16:31:58 PAGE 2   

  56   1              
  57   1      }
  58          
  59          void display(void)
  60          {
  61   1                      x=256*T0count+TL0;      //转换成10进制
  62   1                      i=7;//数码管的显示高位表示数据的低位
  63   1                      while(x)//赋值
  64   1                      {
  65   2                              count[i]=x%10;
  66   2                              x=x/10;
  67   2                              i--;
  68   2                      }
  69   1                              count[i]=x;
  70   1                      for(i=0;i<8;i++)
  71   1                      {
  72   2                              P0=dispbit[i];
  73   2                              P1=dispcode[count[i]];
  74   2                              delay(1);
  75   2                      }
  76   1      }
  77          void main()
  78          {
  79   1                      pulse_init();
  80   1                      TR1=1;//开启timer
  81   1                      TR0=1;
  82   1                      while(1)display();
  83   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    228    ----
   CONSTANT SIZE    =     18    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     16    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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