/******************************************************************/
/*****************************************************************/ 
/*                                                                                                                               
/*                 步進(jìn)電機(jī)加減速運(yùn)行程序                                                                                                                                                                            
/*               步進(jìn)電機(jī)啟動(dòng)時(shí)，轉(zhuǎn)速由慢到快逐步加速。                                                                      
/*               步進(jìn)電機(jī)勻速運(yùn)行                                                                                                       
/*               步進(jìn)電機(jī)由快到慢逐步減速到停止 
/*                                                                                                                                                                                                                                                    
/******************************************************************/
    
#include <reg52.h>       
#include <string.h>    

#define uchar unsigned char
#define uint  unsigned int

sbit  addr0 = P1^4;
sbit  addr1 = P1^5;
sbit  addr2 = P1^6;
sbit  addr3 = P1^7;

uchar code FFW[8]={0x0e,0x0c,0x0d,0x09,0x0b,0x03,0x07,0x06};//正轉(zhuǎn)數(shù)組
uchar code REV[8]={0x06,0x07,0x03,0x0b,0x09,0x0d,0x0c,0x0e};//反轉(zhuǎn)數(shù)組
uchar rate ;        
/********************************************************/
/*                                                  
/* 延時(shí)
/* 11.0592MHz時(shí)鐘，                                    
/*                                                      
/********************************************************/
void delay()
 {                           
   uchar k;
   uint s;
   k = rate;
   do
    {
       for(s = 0 ; s <100 ; s++) ;  
    }while(--k);
 }


void delay2(uchar k)
 {  
                         
   uchar s;
   for(s = 0 ; s <k ; s++) ;  

   }

/********************************************************/
/*
/*步進(jìn)電機(jī)正轉(zhuǎn)
/*
/********************************************************/
void  motor_ffw()
{ 
   uchar i;
 
    for (i=0; i<8; i++)      //一個(gè)周期轉(zhuǎn)30度
    {  
       P0 = FFW[i];//取數(shù)據(jù)
       addr0 = 1;
       addr1 = 0;
       addr2 = 1;
       addr3 = 1;
       addr3 = 0;
       delay();                 //調(diào)節(jié)轉(zhuǎn)速
    }
}

/********************************************************/
/*
/*步進(jìn)電機(jī)反轉(zhuǎn)
/*
/********************************************************/
void  motor_rev()
{ 
   uchar i;
 
    for (i=0; i<8; i++)      //一個(gè)周期轉(zhuǎn)30度
    {  
       P0 = REV[i]; //取數(shù)據(jù)
       addr0 = 1;
       addr1 = 0;
       addr2 = 1;
       addr3 = 1;
       addr3 = 0;
       delay();                 //調(diào)節(jié)轉(zhuǎn)速
    }
}

/********************************************************
*                                                       
*步進(jìn)電機(jī)運(yùn)行                                               
*                                                      
*********************************************************/
void  motor_turn()
{ 
   uchar x;
   rate=0x30;
   x=0xf0;
   do
     {
        motor_ffw();               //正轉(zhuǎn)加速
        rate--;
     }while(rate!=0x0a);

   do
     {     
        motor_ffw();               //正轉(zhuǎn)勻速
       x--;
     }while(x!=0x01);
  
   do
     {
        motor_ffw();              //正轉(zhuǎn)減速 
        rate++;
     }while(rate!=0x30);    
   do
     {
        motor_rev();               //反轉(zhuǎn)加速
        rate--;
     }while(rate!=0x0a);

   do
     {     
        motor_rev();               //反轉(zhuǎn)勻速
       x--;
     }while(x!=0x01);
  
   do
     {
        motor_rev();               //反轉(zhuǎn)減速 
        rate++;
     }while(rate!=0x30);    
}

/********************************************************
*                                                       
*  主程序                                               
*                                                      
*********************************************************/
main()
{     
   
   P1=0xf0; 

   while(1)
  {
       P0 = 0x00;//ULN2003輸出高電平
       addr0 = 1;
       addr1 = 0;
       addr2 = 1;
       addr3 = 1;
       addr3 = 0;
       delay2(255);

       motor_turn();

  } 
}