單片機(jī)霍爾元件測(cè)電機(jī)轉(zhuǎn)速數(shù)碼管顯示源程序

ID:193703 · 發(fā)表于 2017-5-10 22:28

通過霍爾元件對(duì)電機(jī)的轉(zhuǎn)速進(jìn)行監(jiān)測(cè)并用數(shù)碼管顯示轉(zhuǎn)速

同時(shí)使用定時(shí)器，計(jì)數(shù)器
其中用定時(shí)器 0.1s的定時(shí) 滿10個(gè)0.1s 也就是1s一共計(jì)數(shù)的電機(jī)在轉(zhuǎn)速顯示

單片機(jī)程序代碼如下：

#include<reg52.h>
xdata unsigned char OUTBIT _at_ 0x8002;
xdata unsigned char OUTSEG _at_ 0x8004;
unsigned char LEDBuf[6],a,b,tmp;
unsigned char tap3,tap4,tap5;
code unsigned char LEDMAP[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void Delay (unsigned char CNT) //延時(shí)函數(shù)
{
unsigned char i;
while(CNT--!=0)
for(i=100;i!=0;i--);
}
void DisplayLED() //數(shù)碼管顯示函數(shù)
{
unsigned char i;
unsigned char Pos;
Pos=0x20;
for(i=0;i<6;i++)
{
OUTBIT=0;
OUTBIT=Pos;
OUTSEG=LEDBuf[i];
Pos>>=1;
Delay(10);
}
}
void main()
{
TMOD=0X15; //定時(shí)器和計(jì)數(shù)器設(shè)置
TH1=0x3c;
TL1=0XB0;
ET0=1;
EA=1;
TH0=0;
TL0=0;
TR0=1;
IT0=1;
EX0=1;
ET1=1;
TR1=1;
while(1)
{
tap3=tmp/100; //轉(zhuǎn)BCD碼
tap4=(tmp%100)/10;
tap5= tmp%10;
LEDBuf[0]=LEDMAP[tap3]; //數(shù)碼管顯示
LEDBuf[1]=LEDMAP[tap4];
LEDBuf[2]=LEDMAP[tap5];
LEDBuf[3]=LEDMAP[0];
LEDBuf[4]=LEDMAP[0];
LEDBuf[5]=LEDMAP[0];
DisplayLED();
}
}
void T0init()interrupt 3 //定時(shí)器中斷
{ a++;
if(a==10)
{
tmp=TH0*256+TL0;
TH1=0x3c;
TL1=0XB0;
TH0=0;
TL0=0;
a=0;
}
}