main.c

使用单片机AT89S52所编写的高级频率计！

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={
0x5f,0x41,0x9d,0xd5,
0xc3,0xd6,0xde,0x45,
0xdf,0xd7,0xcf,0xda,
0x1e,0xd9,0x9e,0x8e};
sbit dula=P2^6;
sbit wela=P2^7;
sbit test=P2^5;
unsigned long f;
uint t_0,n=0;


void delay(uint z);
void init();
void print(uint number);
void print_1(uint num_p,uint wei);

void main()
{
	init();
	while(1)
	{
		print(f);
	}
}
void init()
{	
	wela=0;
	dula=0;
	EA=0;
	T1=1;	
	TMOD=0x51;
	TH0=15536/256;
	TL0=15536%256;
	TH1=0;
	TL1=0;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;
	EA=1;
	test=0;
}
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);	
}void print(uint number)//阻值分解为三个数，并调用数码管显示函数，number为AD转换读取数。
{
	uint num_1=number;
	print_1(num_1%10,0x06);//第三位
	print_1(num_1%100/10,0x05);//第二位
	print_1(num_1%1000/100,0x03);//第一位
}
void print_1(uint num_p,uint wei)//数码管显示函数，num_p为显示数，wei为选择数码管
{
	
	wela=1;
	P0=wei;
	wela=0;
	dula=1;
	P0=table[num_p];
	dula=0;
	delay(2);
}

void time0() interrupt 1 
{
	EA=0;
	TH0=15536/256;
	TL0=15536%256;
	t_0++;
	test=~test;
	if(t_0==20)
	{
		TR0=0;
		TR1=0;
		t_0=0;
		f=(TH1*256+TL1+65535*n);
		if(f<1000)
		{
			P1=0xfe;
		}else
		if((f>999)&&(f<999999))
		{
			f=f/1000;
			P1=0xfd;
		}else
		{
		if(f>999999)
			f=f/1000000;
			P1=0xfb;
		}
		n=0;
		TH1=0;
		TL1=0;
		TR0=1;
		TR1=1;
	}
	EA=1;

}
void time1() interrupt 3 
{
	n++;
	TH1=0;
	TL1=0;


}