单片机霍尔元件测电机转速数码管显示源程序

ID:193703 · 发表于 2017-5-10 22:28

通过霍尔元件对电机的转速进行监测并用数码管显示转速

同时使用定时器，计数器
其中用定时器 0.1s的定时满10个0.1s 也就是1s一共计数的电机在转速显示

单片机程序代码如下：

#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) //延时函数
{
unsigned char i;
while(CNT--!=0)
for(i=100;i!=0;i--);
}
void DisplayLED() //数码管显示函数
{
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; //定时器和计数器设置
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; //转BCD码
tap4=(tmp%100)/10;
tap5= tmp%10;
LEDBuf[0]=LEDMAP[tap3]; //数码管显示
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 //定时器中断
{ a++;
if(a==10)
{
tmp=TH0*256+TL0;
TH1=0x3c;
TL1=0XB0;
TH0=0;
TL0=0;
a=0;
}
}