key.c

本程序为单片机对四相步进电机的控制

#include <reg51.h>
#include <stdio.h>
#define uchar unsigned char 


unsigned char  key_scan(void );
void send(uchar add,uchar );
void s_seg(uchar,uchar ,uchar,uchar,uchar,uchar,uchar , uchar);

 uchar vo[];	                  //  输入速度存储区
 uchar length[];                  //  输入间距存储区
 bit enterflag;	                 //	  确认键按下与否标志

  void delay(void)	//延时函数
  {
        uchar i;
	    for (i=300;i>0;i--);
   }
   uchar Peyscan(void)	  //键盘扫描函数
   {
         uchar scan,tep;

		 P1=0xf0;	           // 发全0扫描码
	 
	       if((P1&0xf0)==0xf0)	  //若有键盘按下
	        { 
				 delay();   	  //延时函数

				 if((P1&0xf0)==0xf0)   //再判断一次，去除抖动
				 {
                     scan=0xfe;
	                 while((scan&0x10)!=0)	 //	 顺行扫描
	                  {
	                       P1=scan;			 //输出行扫描码

		                   if((P1&0xf0)!=0xf0)	 //本行有键按下
		                   {
		                        tep = (P1&0xf0)|0x0f;

		                         return((~scan)+(~tep));
	                        }

	             	         else scan=(scan<<1)|0x01;			//行扫描码左移一位
	                   }
 	              }
              }												   //无键按下，返回值0
               return(0);
     }


     uchar getcode(uchar i)
     {
        uchar P;

	      switch(i)
	         {
	            case 0:		 	      /* 0 */
		             P=0x3f;
	    	         break;

		        case  1:			  /*  1  */
		              P=0x06;
		              break;

		        case  2:			  /*  2  */
		             P=0x5B;
		             break;

		        case 3:			 	  /*  3 */
	    	         P=0x4f;
		             break;
										
		         case 4:		   	 
		              P=0x66;		  /*  4  */
		              break;

		          case 5:		  
		              P=0x6D;		   /*  5  */
		              break;

		           case 6:		  
		               P=0x7D;		   /*  6  */
	                   break;
									
		           case 7:		  	  /*  7 */
		               P=0x07;
	    	           break;

		            case 8:	      	  /*   8  */
		               P=0x7F;
		               break;

		            case 9:	     	   /*  9  */
		               P=0x67;
		               break;

		            case 10:		  	/*  A  */
		               P=0x77;	    
		               break;

	            	 case 11:	     	 /*  B  */
		               P=0x7c;
		               break;

		             case 12:	     	/*  C  */
		               P=0x39;
		               break;

		             case 13:	     	 /*  D  */
		               P=0x5E;
		               break;

		              case 14:      	 /*  E  */
		                P=0x79;
		                break;

		              case 15:      	 /*  F  */
		                P=0x71;
		                break;
		       
	            	default:
		            break;
            	}
				return(P);
		  }

         	    P1 = 0xf0;					 // 发全0扫描码
								    
	              while((P1&0xf0)!=0xf0) 
				                       	    //若没松开按键
	              {
	                 P1 = 0xf0;
                  }
	    	
	   
	   
	        /*   主电机转动    */  

	  int x

	  unsigned  char  output[6]	={0x08,0x24,0x16,0x48,0x32,0x40}

	  unsigned  i=0

	  while  x>0
	  {
	       P1=output[i]	;

		   Delay();

		   i++;
		if(i==6) i=0;
	   }


	     /*   排电机转动    */  


   void send(uchar add,uchar dat)
{
   	uchar ADS,i,j;
   	CLP=0;
	LOAD=0;
	DIN=0;
   	i=4;
   	while(i<16)
   	{
     	 if(i<8)
	  	{
	  		ADS=add;
		}
	  else
	  	{
			ADS=dat;
		}
	  for(j=8;j>=1;j--)
	  	{

			if((ADS&0x80)==0)
			{	DIN=0 ;}
			else 
			{	DIN=1;}
	  	  	ADS=ADS<<1;
		
		CLP=1;
		CLP=0;	
	 	 }
	  i=i+8;
   }
   LOAD=1;
}

void s_seg(uchar X1,uchar X2,uchar X3,uchar X4,uchar X5,uchar X6,uchar X7, uchar X8)
{
	 send(0x0c,0x01);//正常状态
   send(0x0b,0x07);//设置扫描范围DIG0-7
	 send(0x0a,0x05);//设置亮度11/32
   send(0x09,0xff);//采用译码方式

   send(0x01,X1);
   send(0x02,X2);
   send(0x03,X3);
   send(0x04,X4);
   send(0x05,X5);
   send(0x06,X6);
   send(0x07,X7);
   send(0x08,X8);	
}