直流电机正反转，PWM占空比调速，测速，数码管显示实时速度

ID:559790 · 发表于 2019-7-12 16:39

直流电机正反转，pwm占空比调速，测速，数码管显示当前的速度
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int

sbit jiasu=P1^0;    //占空比加
sbit jiansu=P1^1;    //占空比减
sbit zhengz=P1^2;    //正传
sbit fanz=P1^3;       //反转
sbit tingz=P1^4;    //停止

sbit IN1=P3^0; //用于正传
sbit IN2=P3^1; //用于反转
sbit pwm=P1^7; //调速

uint zhuansu,count,flag,r=25;
uchar code duanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//共阴管

void delay(uint z) //延时1ms函数
{

uint x,y;
for(x=0;x<z;x++)
for(y=0;y<110;y++);
}

/*void  pwm(uint t) //调速
{
ENA=0;
delay(95);
ENA=1;
delay(t);
}    */

void  zz()
{
IN1=1;
IN2=0;
}

void  fz()
{
IN1=0;
IN2=1;
}

void  stop()
{
IN1=0;
IN2=0;
}
void init()//初始化函数
{
  TMOD=0x51;             //定时器,1计数，T0，T1方式1  G,C/t,M0,M1
  TH0=(65535-10000)/256;
  TL0=(65535-10000)%256; //定时器0装入初值
  EA=1;                   //开总中断
  ET0=1;                //定时器0开中断
  TR0=1;
  TH1=0x00;
  TL1=0x00;             //定时1计数初值
  ET1=1;                //定时器1开中断
  TR1=1;
  //EX0=1;
  //IT0=1;
  //count=0;
// flag=0;
}
void  t11()
{
  TH1=0x00;
  TL1=0x00;             //定时1计数初值
  ET1=1;                //定时器1开中断
  TR1=1;
}
void keyscan()  //控制函数
{

if(jiasu==0)
{
while(jiasu==0)
r++;
}
if(jiansu==0)
{
while(jiansu==0)
r--;
}
}
void display(uint x)    //速度显示
{
  if(x>10000)
   {
   P2=0xfd;
   P0=duanma[x/10000];    //wan
   delay(5);
   P2=0xfb;
   P0=duanma[x%10000/1000]; //qian
   delay(5);
   P2=0xf7;
   P0=duanma[x%1000/100]; //bai
   delay(5);
   P2=0xef;
   P0=duanma[x%100/10]; //shi
   delay(5);
   P2=0xdf;
   P0=duanma[x%10]; //ge
   delay(5);

}
    else if(x>1000)
   {
   P2=0xfb;
   P0=duanma[x%10000/1000]; //qian
   delay(5);
   P2=0xf7;
   P0=duanma[x%1000/100]; //bai
   delay(5);
   P2=0xef;
   P0=duanma[x%100/10]; //shi
   delay(5);
   P2=0xdf;
   P0=duanma[x%10]; //ge
   delay(5);

}
else if(x>100)
   {
   P2=0xf7;
   P0=duanma[x%1000/100]; //bai
   delay(5);
   P2=0xef;
   P0=duanma[x%100/10]; //shi
   delay(5);
   P2=0xdf;
   P0=duanma[x%10]; //ge
   delay(5);

}
else if(x>10)
   {
   P2=0xef;
   P0=duanma[x%100/10]; //shi
   delay(5);
   P2=0xdf;
   P0=duanma[x%10]; //ge
   delay(5);

}
else
   {
   P2=0xdf;
   P0=duanma[x%10]; //ge
   delay(5);
}
}

void main()
{

init();             //初始化
while(1)
{
if(tingz==0)
stop();
else if(fanz==0)
fz();
else zz();

      keyscan(); //调速程序
   display(zhuansu); //显示转速
}

}
/*void  t1()interrupt 0 using 1 //外部中断0脉冲技术记录电机的转速电机转一圈count加一
{

  count++  ;

} */
void  t0()interrupt 1 using 2    //定时器0显示转速
{

   count++;
   flag++;
   if(count>50)
   count=0;
   if(count<r)
   pwm=1;
   else pwm=0;
  if(flag==100)    //计时到达1s
{
zhuansu=(TH1*256+TL1);

t11();
flag=0;
}

   TH0=(65535-10000)/256;
   TL0=(65535-10000)%256;//定时10ms  12

}