关于L298N电机驱动模块 PWM调速求解答 -

标题: 关于L298N电机驱动模块 PWM调速求解答 [打印本页]

作者: zz661 时间: 2018-3-20 16:37
标题: 关于L298N电机驱动模块 PWM调速求解答
这段程序哪里错了吗？小车能跑但不能调速,还是我线接错了？
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit pwm1=P2^0;
sbit pwm2=P2^1;
sbit I1=P2^2;
sbit I2=P2^3;
sbit I3=P2^4;
sbit I4=P2^5;
uchar a,t=0,s=20,n=20,pwm;
void init()
{
   TMOD=0X21; //?????1???2
   TL0 = 0xff; //??????
   TH0 = 0xf7;
   TR0 = 1; //???0????    //??????
   TH1=0xfd ;
   TL1=0xfd ; //???
   TR1=1;    //?????1
   REN=1;    // ????

   SM0=0;
   SM1=1;    //?????????1

   EA=1;    // ???????
   ES=1;    // ????????
}

void main()
{
      init();
   while(1);
   }

void tim0() interrupt 1
   {
   TR0=0;
   TH0=0xff;
   TL0=0xf7;
   TR0=1;
   t++;

   if(t>=40)
   { t=0;}
   if(t<=n)
   { pwm1=1;}
   if(n<t<40)
   {pwm1=0;}

   if(t>=40)
   { t=0;}
   if(t<=s)
   { pwm2=1;}
   if(s<t<40)
   {pwm2=0;}
   }
void ser() interrupt 4
   {
   ES=0;
      RI=0; //?????????0;
   a=SBUF; //??????????a

      switch(a)
{
   case 65:  I1=1,I2=0,I3=1,I4=0;  break; //  ????A  ????
   case 66:  I1=0,I2=0,I3=1,I4=0;  break; //  ????B  ????
   case 67:  I1=1,I2=0,I3=0,I4=0;  break; //  ????C  ????
   case 68:  I1=0,I2=1,I3=0,I4=1;  break;    //  ????D  ????
   case 69:  n=s=10;  break;  //E
   case 70:  n=s=20;  break;  //F
   case 71:  n=s=30;  break;  //G

   case 97: I1=I2=I3=I4=0;  break;  //????a ????
   case 98: I1=I2=I3=I4=0;  break;  //????b ????
   case 99: I1=I2=I3=I4=0;  break;  //????c ????
   case 100:  I1=I2=I3=I4=0;  break;  //????d ????

   default: break;
   }
   ES=1;
}

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