text1.c

以单片机控制步进电机的运行速度、方向、行走距离的长短

#include<AT89X52.h>
sbit clock=P2^2;
sbit half=P2^0;
sbit cw=P2^1;
sbit enable=P2^3;
unsigned char count=0;
void delay(unsigned char x);
main()
{  TMOD=0x01;
   EA=1;
   ET0=1;
   TH0=0x3c;
   TL0=0xb0;
   TR0=1;
   while(1);
   
   
}

 void time0(void) interrupt 1 
{ 	TH0=0x3c;
   TL0=0xb0;
   count++;
   clock=~clock;
   delay(10);
   
   if(count>=20 & count<=60)
   { 
     cw=0;
   }
  if(count>60 & count<=80)
   {enable=0;}
 if(count>80)	
{  enable=1;
	cw=1;half=0;}
   
  
}

  void delay(unsigned char x)
{ unsigned i,j;
 for (i=0;i<x;i++)
 for (j=0;j<3;j++)
 ;

}