freqlow.lst

单片机使用IIC总线的完整源码

C51 COMPILER V7.06   FREQLOW                                                               02/07/2004 11:33:45 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE FREQLOW
OBJECT MODULE PLACED IN freqlow.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE freqlow.c OPTIMIZE(6,SPEED) BROWSE INTVECTOR(0X8000) DEBUG OBJECTEXTEND

stmt level    source

   1          #include "reg52.h"
   2          #include "Zlg7290.h"                            //Zlg7290库
   3          #include "viic_c51.h"                           //iic库
   4          
   5          unsigned char scount;
   6          
   7          void timer0_int() interrupt 1
   8          {
   9   1      TR0=0;  //关闭定时器
  10   1      TH0=0x4C;       //重装定时器
  11   1      TL0=0x19;
  12   1      TF0=0;  //清除溢出标志
  13   1      scount--;
  14   1      if(scount>0)    //到1s了吗？
  15   1      TR0=1;  //没到，开定时器
  16   1      else
  17   1      TR1=0;  //到了，停止T1的计数
  18   1      }
  19          
  20          main()
  21          {
  22   1      unsigned char a[5];
  23   1      unsigned char i,resh,resl;
  24   1      unsigned long int freq;
  25   1      TMOD=0xD1;      //定时器0工作在定时方式1，定时器1工作在计数方式1
  26   1      TH0=0x4C;       //定时50ms
  27   1      TL0=0x19;
  28   1      TH1=0;  //计数值清0
  29   1      TL1=0;
  30   1      scount=20;      //定时1s
  31   1      ET0=1;  //开定时器0中断
  32   1      EA=1;   //开总中断
  33   1      TR0=1;  //启动定时器和计数器
  34   1      TR1=1;
  35   1      
  36   1      for (i=0;i<5;++i)
  37   1      a[i]=0;
  38   1      ZLG7290_SendBuf(a,5);   //在LED上显示5位0。
  39   1      while(1)
  40   1      {
  41   2      if(!scount)     //1s时间到
  42   2      {
  43   3      
  44   3      resh=TH1;       //取出计数值
  45   3      resl=TL1;
  46   3      TH1=0;  //计数值清零
  47   3      TL1=0;
  48   3      TH0=0x4C;       //重装定时器0
  49   3      TL0=0x19;
  50   3      scount=20;      //定时1S
  51   3      TR0=1;  //启动定时器和计数器
  52   3      TR1=1;
  53   3      freq=resh*256+resl;     //计算频率值
  54   3      a[0]=freq%10;   //将各位分离显示
  55   3      a[1]=(freq%100)/10;
C51 COMPILER V7.06   FREQLOW                                                               02/07/2004 11:33:45 PAGE 2   

  56   3      a[2]=(freq/100)%10;
  57   3      a[3]=(freq/100)/10%10;
  58   3      a[4]=freq/10000;
  59   3      ZLG7290_SendBuf(a,5);   //送ZLG7290显示
  60   3      }
  61   2      }
  62   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    286    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1      11
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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