51单片机利用超声波测距同时测出超声波的频率，不知道哪..

只看该作者 · 2015-12-20 23:36

新手写的程序，实在不懂哪里错/* int.c test int0 */
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit  trig  = P3^7;
char DATA_7SEG[10]={0xC0, 0xF9, 0xA4, 0xB0, 0x99,
                  0x92, 0x82, 0xF8, 0x80, 0x90};
char act[4]={0xfe, 0xfd, 0xfb, 0xf7}; /* p2.0--p2.3 */
uint a,flag,x;
uchar hi,lo,Tm_count,f_count,Flash,ex0_count,b,count;
/*-----------------------------*/
void delay(int d)
{
int i, j;
for(i=0; i<d; i++)
for(j=0; j<100; j++)  ;
}
/*-----------------------------------*/
void ex1_int(void) interrupt 2
{

TR0=0;
a=TH0*256+TL0;
count++;

}
void ex0_int(void) interrupt 0 using 1
{
ex0_count ++;
if(ex0_count==1)
{
TH1=hi;
TL1=lo;
EX1=1;
TR1=1;
}
else if(ex0_count==2)
{
EX1=0;
TR1=0;
b=0;
}
if(ex0_count==3)
{
TH1=hi;
TL1=lo;
EX1=1;
TR1=1;
count=0;
Tm_count=0;
}
else if(ex0_count==4)
{
EX1=0;
TR1=0;
ex0_count=0;
}
}
void de110(void)
{
char c;
c=1;c=1;c=1;

}
void tr_pu(void)
{
trig=1;
de110();
trig=0;
}
void t1isr(void) interrupt 3
{
TH1=hi;
TL1=lo;
TH0=0;
TL0=0;
tr_pu();
TR0=1;
Tm_count ++;
if(Flash==1)
{
f_count ++;
P1=~P1;
if(f_count==2)
Flash=0;
}
}
/*----------------------*/
main()
{
uint a1,a2,a3,a4,value;
uint y1,y2,b,avg;
uchar x1,x2,x3,x4;
value=65536-46082;
TH1=hi=value/256;
TL1=lo=value%256;
   TCON=0x05;
   TMOD=0x01;
   IE=0x8D;
   flag=0;

   TR1=1;
   x=0;
   a=0;
   a1=0;
   a2=0;
   a3=0;
   a4=0;
   b=0;
   count=0;
   Tm_count=0;
   ex0_count=0;
   while(1)
   {
   if(Tm_count==10)
    {
       avg=(a1+a2+a3+a4+a)/5;
   b=(avg*0.18445-69.6);
   x=count*2;
   Tm_count=0;
   count=0;
    }

       a4=a3;
   a3=a2;
   a2=a1;
   a1=a;
   if(ex0_count==0||ex0_count==1||ex0_count==2)
{
   if(b>3500)
   {
   b=3500;
   }
   else if(b<100)
   {
   f_count=0;
   Flash=1;
   }
      x1=b/1000;
   y1=b%1000;
   x2=y1/100;
   y2=y1%100;
   x3=y2/10;
   x4=y2%10;

   P0=DATA_7SEG[x1];
   P2=act[0];
   delay(1);


   P0=DATA_7SEG[x2];
   P2=act[1];
   delay(1);

   P0=DATA_7SEG[x3];
   P2=act[2];
   delay(1);

   P0=DATA_7SEG[x4];
   P2=act[3];
   }
   if(ex0_count==3||ex0_count==4)
     {
   x1=x/1000;
         y1=x%1000;
         P0=DATA_7SEG[x1];
         P2=act[0];

   x2=y1/100;
   y2=y1%100;
   P0=DATA_7SEG[x2];
      P2=act[1];

   x3=y2/10;
   P0=DATA_7SEG[x3];
      P2=act[2];

   x4=y2%10;
   P0=DATA_7SEG[x4];
      P2=act[3];

     }
   }
}