5-4.lst

89c51的等精度频率计lcd1602显示

C51 COMPILER V7.09   5_4                                                                   07/05/2007 08:04:52 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE 5_4
OBJECT MODULE PLACED IN 5-4.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 5-4.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg51.h>
   2          #include<stdio.h>
   3          #include<lcd.c>
   4          #include<math.h>
   5          sbit p32=P3^2;
   6          main()
   7          { 
   8   1       unsigned int period,k,j,i=0;
   9   1       unsigned long int f;
  10   1       char buff[30];
  11   1       init_LCD();
  12   1       P2=0x00;
  13   1       while(1)
  14   1       {
  15   2        TMOD=0X09;
  16   2        TH0=0;
  17   2        TL0=0;
  18   2        while(p32==1);
  19   2        TR0=1;
  20   2        while(p32==0);
  21   2        while(p32==1);
  22   2        TR0=0;
  23   2        period=TH0*256+TL0;
  24   2        while(period<=500)
  25   2        { P2++;
  26   3          i++;
  27   3              period=period*10;
  28   3          if(i==6)
  29   3          {P2=0x00;
  30   4              break;
  31   4              }
  32   3        }
  33   2        k=pow(10,i);          /* 10的i次方*/
  34   2        f=(1000000.0/(2*period))*k;
  35   2        sprintf(buff,"f=%ldhz",f);
  36   2        lcdprintf(0,0,buff);
  37   2       }
  38   1      }
*** WARNING C280 IN LINE 8 OF 5-4.C: 'j': unreferenced local variable


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    411    ----
   CONSTANT SIZE    =     32    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      42
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  1 WARNING(S),  0 ERROR(S)