📄 freq.c
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/* Note:Your choice is C IDE */
#include "stdio.h"
#include <intrins.h> // 外部函数头文件
#include<reg52.h>
#include<string.h>
#include<LCD1602.h>
#define uchar unsigned char
#define uint unsigned int
sbit ctr=P1^1; //选择T0信号输入
uint freq; //初步频率
uint cnt; //定时重载次数
uint per; //采样周期数
uint ave; //采样值取平均数
uint per_0; //暂存per
int ave_0; //暂存ave
int per_1; //暂存per
uint ave_1; //暂存ave
uint xdata a[256]={0}; //相位脉冲采样的数据
uint xdata b[256]={0}; //周期采样的数据
uchar idata str[]={"Meng long"} ;
float peri; //计算后的周期
float frq; //计算后的频率
float pha; //计算后的相位
float cnt1; //求平均后的高电平采样值
float cnt2; //求平均后的周期采样值
bit flag; //判断是内部脉冲还是外部脉冲采样
bit end0,end1,end_0,end_1;
void delay_ms(uint t) //延时函数
{
unsigned char t2=2000;
while(t--)while(t2--);
}
void init_T0(void) //初始化T0
{
TMOD=0x15;
TL0=0;
TH0=0;
cnt=0;
}
void init_T1(void) //初始化T1
{
// TL1=0xDC;
// TH1=0x0B;
TL1=0xB0;
TH1=0x3C;
}
void freq_1(void) //频率初步测量
{
ctr=1;
init_T0();
init_T1();
IE=0x8A;
TR0=1;
TR1=1;
while(cnt<40);
if(cnt==40)
{
delay_ms(26);
if(freq<=5)
{
per=2;ave=1;flag=0;
}
else if(freq<=20)
{
per=8;ave=1;flag=0;
}
else if(freq<=75)
{
per=32;ave=1;flag=0;
}
else if(freq<=280)
{
per=128;ave=1;flag=0;
}
else if(freq<=1100)
{
per=2;ave=1;flag=1;
}
else if(freq<=4000)
{
per=8;ave=4;flag=1;
}
else if(freq<=15000)
{
per=32;ave=16;flag=1;
}
else if(freq<=70000)
{
per=128;ave=64;flag=1;
}
else
{
per=256;ave=256;flag=1;
}
}
else
{
per=256;ave=256;
}
IE=0;
}
void cnt0(void) interrupt 1 //定时器/计数器0溢出中断函数
{
TR0=0;
TR1=0;
cnt=41;
}
void time1(void) interrupt 3 //定时器/计数器1溢出中断函数
{
if(cnt<40) //T1是否需要关闭再开启？？
{
TR0=0;
TR1=0;
cnt++;
init_T1();
TR0=1;
TR1=1;
}
else
{
TR0=0;
TR1=0;
freq=TH0*256+TL0;
}
}
void pha_1(void) //高电平采样
{
int i=0;
float a_=0;
float b_=0;
cnt1=0;cnt2=0;
per_0=per;ave_0=ave;
per_1=per;ave_1=ave;
end0=end1=end_0=end_1=0;
TMOD=0x99;
//采样相位差
EX0=1;
if(flag==0) ctr=0;
else ctr=1;
TH0=0;TL0=0;
IT0=1;
while(end0==0)
{
while(INT0==1);
while(INT0==0);
while(INT0==1)
{
TR0=1;
EA=1;
}
while(end_0==0);
}
EA=0;
EX0=0;
//采样周期
EX1=1;
if(flag==0) ctr=0;
else ctr=1;
TH1=0;TL1=0;
IT1=1;
while(end1==0)
{
while(INT1==1);
while(INT1==0);
while(INT1==1)
{
TR1=1;
EA=1;
}
while(end_1==0);
}
//求均值
for(i=0;i<ave;i++)
{
a_=a[i]/ave;
cnt1=cnt1+a_;
b_=b[i]/ave;
cnt2=cnt2+b_;
}
EA=0;
EX1=0;
}
void cyc0(void) interrupt 0// 外部中断1函数
{
EA=0;TR0=0;
per_0--;
if(per_0==0)
{
ave_0--;
a[ave_0]=TH0*256+TL0+1; //读取数据
TH0=0;TL0=0;
per_0=per;
if(ave_0==0)
{
end0=1;
}
}
end_0=1;
}
void cyc1(void) interrupt 2 //外部中断1函数
{
EA=0;TR1=0;
per_1--;
if(per_1==0)
{
ave_1--;
b[ave_1]=TH1*256+TL1+1; //读取数据
TH1=0;TL1=0;
per_1=per;
if(ave_1==0)
{
end1=1;
}
}
end_1=1;
}
/*void pha_1(void) //高电平采样
{
uint i;
per_0=per;ave_0=ave;
per_1=per;ave_1=ave;
if(flag==0)
{
ctr=0;
// TMOD=0xDD;
TMOD=0xD0;
IE=0x85;
}
else
{
ctr=1;
// TMOD=0x99;
TMOD=0x90;
IE=0x85;
}
TH0=0;TH1=0;TL0=0;TL1=0;
IT0=1;IT1=1;
// INT0=1;INT1=1; //有疑问
// TR0=1;
while(INT1==0)INT1=1;TR1=1;
// while(ave_0!=-1||ave_1!=-1);
// if(ave_0==-1&&ave_1==-1)
while(ave_0!=-1||ave_1!=-1);
if(ave_0==-1&&ave_1==-1)
{
EA=0;
for(i=0;i<ave;i++)
{
a_=a[i]/ave;
b_=b[i]/ave;
cnt1=cnt1+a_;
cnt2=cnt2+b_;
}
}
}*/
/*
void cyc0(void) interrupt 0 //外部中断0函数
{
per_0--;
if(per_0==0)
{
ave_0--;
a[ave_0]=TH0*256+TL0; //读取数据
TH0=0;TL0=0;
per_0=per;
}
if(ave_0==0)
{
TR0=0;
EX0=0;
ave_0--;
}
} */
/*void cyc1(void) interrupt 2 //外部中断1函数
{
per_1--;
if(per_1==0)
{
ave_1--;
b[ave_1]=TH0*256+TL0; //读取数据
TH1=0;TL1=0;
per_1=per;
}
if(ave_1==0)
{
TR1=0;
EX1=0;
ave_1--;
}
}
*/
void LCD_write_3xs(int x,int y,int xs) //三位小数显示函数
{
if(xs==0)
{
LCD_write_char(x,y,'0');
LCD_write_char(x+1,y,'0');
LCD_write_char(x+2,y,'0');
}
else if(xs<10)
{
LCD_write_char(x,y,'0');
LCD_write_char(x+1,y,'0');
LCD_write_int(x+2,y,xs);
}
else if(xs<100)
{
LCD_write_char(x,y,'0');
LCD_write_int(x+1,y,xs);
}
else LCD_write_int(x,y,xs);
}
void LCD_write_2xs(int x,int y,int xs) //两位小数显示函数
{
if(xs==0)
{
LCD_write_char(x,y,'0');
LCD_write_char(x+1,y,'0');
}
else if(xs<10)
{
LCD_write_char(x,y,'0');
LCD_write_int(x+1,y,xs);
}
else LCD_write_int(x,y,xs);
}
void LCD_dis(void) //显示函数(整数部分为零调试未成功）
{
int peri1,peri2;
int frq1,frq2;
uint pha1,pha2,pha_;
long frq_,peri_;
LCD_write_string(0,0,"f=");
LCD_write_string(0,1,"T=");
LCD_write_string(12,0,"P=");
if(frq<1000)
{
frq_=frq*100;
frq1=frq_/100;frq2=(frq_%100);
if(frq1<10)
{
LCD_write_int(2,0,frq1);
LCD_write_char(3,0,'.');
LCD_write_2xs(4,0,frq2);
LCD_write_string(6,0,"Hz");
LCD_write_string(8,0," ");
}
else if(frq1<100)
{
LCD_write_int(2,0,frq1);
LCD_write_char(4,0,'.');
LCD_write_2xs(5,0,frq2);
LCD_write_string(7,0,"Hz");
LCD_write_string(9,0," ");
}
else
{
LCD_write_int(2,0,frq1);
LCD_write_char(5,0,'.');
LCD_write_2xs(6,0,frq2);
LCD_write_string(8,0,"Hz");
LCD_write_string(10,0," ");
}
peri_=peri*1000000;
peri1=peri_/1000;peri2=peri_%1000;
if(peri1<10)
{
LCD_write_int(2,1,peri1);
LCD_write_char(3,1,'.');
LCD_write_3xs(4,1,peri2);
LCD_write_char(7,1,'m');
LCD_write_string(8,1," ");
}
else if(peri1<100)
{
LCD_write_int(2,1,peri1);
LCD_write_char(4,1,'.');
LCD_write_3xs(5,1,peri2);
LCD_write_char(8,1,'m');
LCD_write_string(9,0," ");
LCD_write_string(10,1," ");
}
else
{
LCD_write_int(2,1,peri1);
LCD_write_char(5,1,'.');
LCD_write_3xs(6,1,peri2);
LCD_write_char(9,1,'m');
LCD_write_string(11,1," ");
}
}
else
{
frq_=frq;
frq1=frq_/1000;frq2=frq_%1000;
if(frq1<10)
{
LCD_write_int(2,0,frq1);
LCD_write_char(3,0,'.');
LCD_write_3xs(4,0,frq2);
LCD_write_string(7,0,"k");
LCD_write_string(8,0," ");
}
else if(frq1<100)
{
LCD_write_int(2,0,frq1);
LCD_write_char(4,0,'.');
LCD_write_3xs(5,0,frq2);
LCD_write_string(8,0,"k");
LCD_write_string(9,0," ");
}
else if(frq1<1000)
{
LCD_write_int(2,0,frq1);
LCD_write_char(5,0,'.');
LCD_write_3xs(6,0,frq2);
LCD_write_string(9,0,"k");
LCD_write_string(10,0," ");
}
else
{
LCD_write_int(2,0,frq1);
LCD_write_char(6,0,'.');
LCD_write_3xs(7,0,frq2);
LCD_write_string(10,0,"k");
LCD_write_string(11,0," ");
}
peri_=peri*100000000;
peri1=peri_/100;peri2=peri_%100;
if(peri1==0)
{
LCD_write_char(2,1,'0');
LCD_write_char(3,1,'.');
LCD_write_2xs(4,1,peri2);
LCD_write_char(6,1,'u');
LCD_write_string(7,1," ");
}
else if(peri1<10)
{
LCD_write_int(2,1,peri1);
LCD_write_char(3,1,'.');
LCD_write_2xs(4,1,peri2);
LCD_write_char(6,1,'u');
LCD_write_string(7,1," ");
}
else if(peri1<100)
{
LCD_write_int(2,1,peri1);
LCD_write_char(4,1,'.');
LCD_write_2xs(5,1,peri2);
LCD_write_char(7,1,'u');
LCD_write_string(8,1," ");
}
else
{
LCD_write_int(2,1,peri1);
LCD_write_char(5,1,'.');
LCD_write_2xs(6,1,peri2);
LCD_write_char(8,1,'u');
LCD_write_string(9,1," ");
}
}
pha_=pha*100;
pha1=pha_/100;pha2=(pha_%100);
if(pha>360)pha1=pha_-360;
if(pha1<10) LCD_write_int(12,1,pha1);
if(pha1<100) LCD_write_int(11,1,pha1);
else LCD_write_int(10,1,pha1);
LCD_write_char(13,1,'.');
LCD_write_2xs(14,1,pha2);
}
main()
{
LCD_init();
LCD_write_string(4,0,"WAIT...");
delay_ms(1000);
//是对采样值清零
while(1)
{
LCD_init();
LCD_write_string(1,0,str);
delay_ms(200);
freq_1();
LCD_init();
LCD_write_int(1,0,freq);
LCD_write_int(1,1,ave);
delay_ms(400);
pha_1();
LCD_init();
LCD_write_int(1,0,cnt2);
LCD_write_int(1,1,cnt1);
delay_ms(2000);
pha=(360*cnt1)/cnt2;
if(flag==1) frq=(1000000*per)/cnt2;
else frq=(1000000*per)/256*cnt2;
peri=1/frq;
LCD_init();
LCD_dis();
delay_ms(1000);
}
} ⌨️ 快捷键说明
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