dd.c

PWM电机正反转C程序！包括电路图！很受欢迎的！

#include <reg51.h>

#define uchar unsigned char
#define uint unsigned int 

sbit motor1=P1^5;
sbit motor2=P1^6;
sbit bee=P1^7;
sbit start_key=P1^3;
sbit back_key=P1^4;
sbit stop_key=P1^0;

void Delay1ms(uint count)
{
	uint i,j;
	for(i=0;i<count;i++)
	for(j=0;j<120;j++);
}

void buzzer(uchar b)
{	
   uchar k;
   for(k=0;k<b;k++)
   {  
      bee=0;
      Delay1ms(100);
	  bee=1;
   } 
}

main()
{
   
   while(1)
   {
      if(!start_key)
      {
         Delay1ms(50);
		 if(!start_key)
		 {
		    buzzer(1);
	        motor1=1;motor2=0;
	        while(!start_key);
		  }
      }
      if(!back_key)
      {
         Delay1ms(50);
		 if(!back_key)
		 {
		    buzzer(1);
	        motor1=0;motor2=1;
	        while(!back_key);
		  }
      }
	  if(!stop_key)
      {
         Delay1ms(50);
		 if(!stop_key)
		 {
		    buzzer(1);
	        motor1=1;motor2=1;
	        while(!stop_key);
		 }
      }

   }

}