單片機PWM電機調速程序，如何讓分的速度等級更多一些？

ID:595380 · 發表于 2020-11-7 00:58

#include <reg52.h>
#define uchar unsigned char
uchar a,num=0,gao=1,di=5;
sbit dianji = P1^7;

void delay(int z)
{
      int i,j;
      for(i=z;i>0;i--)
      for(j=114;j>0;j--);
}

void Init()
{
      TMOD = 0x20;
      TH1 = 0xfd;
      TH0 = 0xfd;
      SCON = 0x50;
      EA = 1;
      ES = 1;
      TR1 = 1;
}

void Ser() interrupt 4
{
      RI = 0;
      a = SBUF;
}

void key()
{
      if(a == 0x31)
      {
            num++;
            if(num == 4)
                     num = 3;
      //       while(a == 0x31);
      }
      if(a == 0x32)
      {
            if(num != 0)
                     num--;
            else
                     num = 0;
  //       while(a == 0x32);
      }
}

void dispose()
{
      switch(num)
      {
            case 0: gao = 1;di = 3;break;
            case 1: gao = 2;di = 2;break;
            case 2: gao = 3;di = 1;break;
            case 3: gao = 4;di = 4;break;
      }
}

void qudong()
{
      uchar i;
  if(di != 0)
  {
            for(i=0;i<di;i++)
            {
                     dianji = 0;
                     delay(20);
            }
      }
      for(i=0;i<gao;i++)
            {
                     dianji = 1;
                     delay(20);
            }
}

void main()
{
      Init();
      while(1)
      {
            dianji = 0;
            key();
            dispose();
            qudong();
      }
}