final程序(hao).txt

很不错的频率计的设计

#include <reg52.h>
#include <stdio.h>
#define uint unsigned int
sbit P2_6=P2^6;
sbit P3_2=P3^2;
uint t=0,s;
unsigned char d3,d2,d1,d0;
float count,f;
bit rflag=0;

unsigned char table[10]={0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,0x01,0x09};

void delay(void)	//1s软件延时
{unsigned int i=500,j;
   while(i)
	{i--;
	j=250;
	while(j)
		{j--;}}}

void control(void)
{
  TMOD=0x09;
  IT0=1;
  TH0=0;
  TL0=0;
  EX0=1;
  EA=1;
  ET0=1;
  P2_6=1;
  while(P3_2==0);
  TR0=1;
  P2_6=0;
  while(P3_2==1);
}

void display(void)
{ 
  s=f;
  d0=s%10;
  s/=10;
  d1=s%10;
  s/=10;
  d2=s%10;
  s/=10;
  d3=s%10;
  putchar(table[d0]);
  putchar(table[d1]);
  putchar(table[d2]);			  
  putchar(table[d3]);
}

void t0(void)interrupt 1
{
  TH0=0;
  TL0=0;
  TR0=1;
  t++;
 }

void int_0(void)interrupt 0 
{
  EA=0;
  TR0=0;
  count=(TL0+TH0*256+t*65536)/1000000.0;
  t=0;
  rflag=1;
  EA=1;
}

void main(void)
{
  SCON=0x00;
  TI=1;
  control();
  while(rflag==0);
  f=60.0/count;
  display();
  delay();
}