用at89c51做的频率计
但是检测的结果和实际的相差太大 2倍还多呢
程序如下 有人帮我看看怎么回事
#include <reg51.h>
unsigned char code dispbit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char code dispcode[]={0xc0,0xf9,0xa4,0xb0,0x99,
0x92,0x82,0xf8,0x80,0x90,0xff,};
unsigned char dispbuf[6]={0,0,0,0,10,10};
unsigned char temp[6];
unsigned char dispcount;
unsigned char t0count;
unsigned char timecount;
bit flag;
unsigned long x;
void main(void)
{
unsigned char i;
TMOD=0x15;
TH0=0;
TL0=0;
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
TR1=1;
TR0=1;
ET0=1;
ET1=1;
EA=1;
while(1)
{
if(flag==1)
{
flag=0;
x=t0count*65536+TH0*256+TL0;
for(i=0;i<6;i++)
{
temp=0;
}
i=0;
while(x/10)
{
temp=x%10;
x=x/10;
i++;
}
temp=x;
for(i=0;i<6;i++)
{
dispbuf=temp;
}
timecount=0;
t0count=0;
TH0=0;
TL0=0;
TR0=1;
}
}
}
void t0(void) interrupt 1 using 0
{
t0count++;
}
void t1(void) interrupt 3 using 0
{
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
timecount++;
if(timecount==250)
{
TR0=0;
timecount=0;
flag=1;
}
P0=dispcode[dispbuf][dispcount]];
P2=dispbit[dispcount];
dispcount++;
if(dispcount==6)
{
dispcount=0;
}
}
实验板上的频率发生装置用的是74HC4060 |
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