1.lst

基于UCM40的超声波测距函数,可测0.08---2.5米距离,数值精确

C51 COMPILER V8.02   1                                                                     08/17/2007 10:25:49 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE 1
OBJECT MODULE PLACED IN 1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg51.h>
   2          #define uchar unsigned char
   3          #define uint  unsigned int
   4          #define ulong unsigned long
   5          
   6          extern void cs_t(void);
   7          extern void delay(uint);
   8          extern void display(uchar*);
   9          data uchar testok;
  10          
  11          void main(void)
  12          {
  13   1        data uchar dispram[5];
  14   1        data uint  i;
  15   1        data ulong time;
  16   1        P0=0xff;
  17   1        P2=0xff;
  18   1        TMOD=0X11;
  19   1        IE=0X80;
  20   1         while(1)
  21   1          {
  22   2             cs_t();
  23   2             delay(1);
  24   2                 testok=0;
  25   2                 EX0=1;
  26   2                 ET0=1;
  27   2                 while(!testok)display(dispram);
  28   2                 if(1==testok)
  29   2                      {
  30   3                              time=TH0;
  31   3                              time=(time<<8)|TL0;
  32   3                              time*=172;
  33   3                              time/=10000;
  34   3                              dispram[0]=(uchar)(time%10);
  35   3                              time/=10;
  36   3                              dispram[1]=(uchar)(time%10);
  37   3                              time/=10;
  38   3                              dispram[2]=(uchar)(time%10);
  39   3                              dispram[3]=(uchar)(time/10);
  40   3                              if(0==dispram[3])  dispram[3]=17;
  41   3                      }
  42   2                else
  43   2                      {
  44   3                              dispram[0]=16;
  45   3                              dispram[1]=16;
  46   3                              dispram[2]=16;
  47   3                              dispram[3]=16;
  48   3      
  49   3                }
  50   2      for(i=0;i<300;i++)display(dispram);
  51   2          }
  52   1      }
  53          void cs_r(void) interrupt 0
  54          {TR0=0;
  55   1       ET0=0;
C51 COMPILER V8.02   1                                                                     08/17/2007 10:25:49 PAGE 2   

  56   1       EX0=0;
  57   1       testok=1;
  58   1      }
  59          void overtime(void) interrupt 1
  60          {
  61   1       EX0=0;
  62   1       TR0=0;
  63   1       ET0=0;
  64   1       testok=2;
  65   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    320    ----
   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)