51單片機基于PWM 直流電機迷你風扇控制系統

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發布時間: 2018-6-20 09:31

正文摘要:

拜求 51單片機基于PWM 直流電機迷你風扇控制程序要求能夠分三檔調速按下K1鍵弱風按下K2鍵中風按下K3鍵強風按下K4J鍵停止

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ID:236125 發表于 2018-6-22 21:51

#include<reg51.h>
#define uint unsigned int
#define uchar unsigned char
#define  CYCLE 10       //pwn周期
sbit  PWN0=P1^4;
sbit  PWN1=P1^5;
sbit  key1=P3^0;       //jia
sbit  key2=P3^1;       //jian
sbit  key3=P3^2;       //tingzhi
sbit  key4=P3^3;  //zhengfanzhuan
char  PWN_ON=0;
char  count=0;       //定時器計數
int  num,flag;//正反轉標志位
sbit beep=P2^3;
void delayms(int x)
{
int i,j;
      for(i=x;i>0;i--)
      for(j=110;j>0;j--);
}

void keyscan()
{
   if(key1==0)
      {
         delayms(5);
            if(key1==0)
            {
                  while(!key1);
               if(num<=3)
                        num++;
                        if(num==2)
                        {
                           beep=0;
                              P0=0x00;
                              delayms(10);
                              beep=1;
                              P0=0xff;
                        }
                        if(num==3)
                        {
                           beep=0;
                              P0=0x00;
                        }
            }
      }
if(key2==0)
      {
         delayms(5);
         if(key2==0)
         {
            if(num>0)
               num--;
               while(!key2);
            }
      }
      if(key3==0)
      {
         delayms(5);
         if(key3==0)
         {
            while(!key3);
            num=!num;
         }
      }
      if(key4==0)
      {
         delayms(5);
               if(key4==0)
               {
                  while(!key4);
                  flag++;
                     if(flag==2)
                     flag=0;
               }
      }
      switch(num)
      {
         case 0: PWN_ON=0;break;
               case 1: PWN_ON=4;break;
               case 2: PWN_ON=7;break;
               case 3: PWN_ON=10;break;
         default:
               break;
      }
}
void init()       //初始化
{

      PWN0=1;
      PWN1=1;
TMOD=0X01;
      TH1=(65535-45872)/256;
      TL1=(65535-45872)%256;
      EA=1;
      ET1=1;
      TR1=1;
}
void main()
{
init();
      while(1)
      {
         keyscan();
      }
}
void  T1_time()interrupt 3
{
      TH1=(65535-45872)/256;
      TL1=(65535-45872)%256;
         count++;
      if(count>CYCLE)
      count=0;
      if(count<PWN_ON)//進行正反轉
      {
            if(flag==1)
               {

                        PWN0=0;
            PWN1=1;
                     }
                     else
                     {
                        PWN0=1;
            PWN1=0;
                     }
      }
      else
      {
         PWN0=1;
      PWN1=1;
      }
}

ID:349556 發表于 2018-6-22 10:38