數(shù)字頻率計(jì)

仿真原理圖：

#include <reg52.h>

#define uchar unsigned char

#define uint? unsigned? int

uchar duan[10]={0xc0,0Xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};???????? //所需的段的位碼

//uchar wei[4]={0XEf,0XDf,0XBf,0X7f};???????????????????????????????? //位的控制端???? (開發(fā)板)

uchar wei[4]={0X80,0X40,0X20,0X10};???????????????????????????????? //位的控制端????? (仿真)

uint z,x,c,v, date;??? //定義數(shù)據(jù)類型

uint dispcount=0;

uint lck=0;

uint disp=0;

/******************************************************************

P2=wei[3];

P0=duan[v];

delay(50);

}

/*************************************************************************

定時(shí)器初值1ms

**************************************************************************/

void initTimer(void)

{

TMOD=0x0;

TH0=0xe3;

TL0=0xc;

}

/*************************************************************************

定時(shí)器函數(shù)

**************************************************************************/

void timer0(void) interrupt 1

{

TH0=0xe3;

TL0=0xc;

lck++;

if(lck==1000)

{

disp=dispcount;

lck=0;

dispcount=0;

}

}

/*************************************************************************

中斷函數(shù)

**************************************************************************/

void int0(void) interrupt 0

{

dispcount++; //每一次中斷，計(jì)數(shù)加一

}

/*************************************************************************

主函數(shù)

**************************************************************************/

void main(void)

{

IT0=1;???? //INT0下降沿中斷

EX0=1;???? //允許INT1中斷

initTimer(); //裝入初值

TR0=1;

ET0=1;

EA=1;

while(1)

{

date=disp;

xianshi();