低频计(0.00~99.99HZ)加入信号后一直显示0,希望大手给力
贴代码,少废话
//外部信号输入到INT1端口#include<reg52.h>#define uchar unsigned char#define uint unsigned int#define ulong unsigned longuint us100; //对100us时间间隔单位计数,既有多少个100usuchar old_t0; //外部频率输入时的T0值uchar old_us100; //外部频率输入时的us100ulong f; //存放频率值,单位HZuint qian,bai,shi,ge;uchar flag; //标志位double f_temple; uchar code f_table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void delay(uint z){
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uint qian,uchar bai,uchar shi,uchar ge){
P2=0X01;
P0=f_table[qian];
delay(5);
P2=0X02;
P0=f_table[bai]+0x80;
delay(5);
P2=0X04;
P0=f_table[shi];
delay(5);
P0=0X08;
P0=f_table[ge];
delay(5);}
void init(){
TMOD=0X02;
TH0=-100;
TL0=-100;
ET0=1;
TR0=1;
IT1=1;
EX1=1;
us100=0;
flag=0;
old_t0=0;
old_us100=0;
f_temple=0;
f=0;
EA=1;}
void t0_intr() interrupt 1{
us100++;}
void x1_intr() interrupt 2{
static uchar sts=0;
uchar temp1,temp2;
switch(sts)
{
case 0: sts=1; break;
case 1: sts=2; TR0=0; old_t0=TL0; old_us100=us100; TR0=1; break;
case 11:
{
TR0=0;
temp1=TL0;
temp2=us100;
f_temple=(double)1000000/((temp2-old_us100)*100+(temp1-old_t0))/10;
f=(ulong)f_temple*100;
flag++;
qian=f/1000;
bai=f%1000/100;
shi=f%100/10;
ge=f%10;
TR0=1;
}
sts=0;
break;
}
}
void main(){
init();
while(1)
{
if(flag!=0)
{
flag=0;
display(qian,bai,shi,ge);
}
}}
自己顶!
我都有点失望了!
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit E=P2^7;
sbit RW=P2^6;
sbit RS=P2^5;
sbit k1=P1^7;
sbit k2=P1^3;
unsigned long count;
uint n, ajcs, yc=0;
void delay(uchar z)
{
uchar x, y;
for (x = 110; x > 0; x--)
{
for (y = z; y > 0; y--);
}
}
void writecom(uchar com) //液晶的写指令
{
RS=0;
E=0;
P0=com;
delay(5);
E=1;
delay(5);
E=0;
}
void writedate(uchar date) //液晶的写数据
{
RS=1;
E=0;
P0=date;
delay(5);
E=1;
delay(5);
E=0;
}
void xianshi(uchar dz, unsigned long dx) //显示数字变化
{
uint shiwan, wan, qian, bai, shi, ge;
shiwan=dx/100000;
wan=dx/10000%10;
qian=dx/1000%10;
bai=dx/100%10;
shi=dx/10%10;
ge=dx%10;
writecom(0x80+dz);
writedate(0x30+shiwan);
writedate(0x30+wan);
writedate(0x30+qian);
writedate(0x30+bai);
writedate(0x30+shi);
writedate(0x30+ge);
}
void inti1() //液晶的初始化
{
RW=0;
writecom(0x38);
writecom(0x0c);
writecom(0x06);
writecom(0x01);
writecom(0x80);
}
void inti2() //中断的初始化
{
EA=1;
TMOD=0x51;
TH0=0x4C;
TL0=0x28;
TH1=0;
TL1=0;
ET0=1;
TR0=1;
TR1=1;
}
void inti3()
{
T2CON = 0x34;
TH2 = 0xFF;
TL2 = 0xDC;
RCAP2H = 0xFF;
RCAP2L = 0xDC;
SCON = 0x50;
TR2 = 1;
TI=1;
}
void fs(uchar x)
{
while(TI == 0);
SBUF = x+0x30;
TI = 0;
}
void chuankou(unsigned long count)
{
uint shiwan, wan, qian, bai, shi, ge;
k1=0;
shiwan=count/100000;
wan=count/10000%10;
qian=count/1000%10;
bai=count/100%10;
shi=count/10%10;
ge=count%10;
if (k2 == 0)
{
delay(5);
if(k2==0)
{
ajcs++;
while(!k2);
if (ajcs==1)
{
ajcs=0;
fs(shiwan);
fs(wan);
fs(qian);
fs(bai);
fs(shi);
fs(ge);
while(TI == 0);
SBUF = 'H';
TI = 0;
while(TI == 0);
SBUF = 'Z';
TI = 0;
while(TI == 0);
SBUF = ' ';
TI = 0;
}
}
}
}
void timer0() interrupt 1
{
n++;
TH0=0x4C;
TL0=0x28;
if (TF1==1)
{
yc=yc+1;
TF1=0;
}
if(n==20)
{
n=0;
EA=0;
count=TH1*256+TL1+yc*65536;
yc=0;
TH1=0;
TL1=0;
EA=1;
}
}
void main()
{
inti1();
inti2();
inti3();
while(1)
{
chuankou(count);
xianshi(2,count);
}
}
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