/*******************************************************************************************************************
*       版權歸huaer所有                                                                                                             **
* 功能：SH-20504控制56BYG250C的單片機程序                                                                                         **
* 輸出：PWM                                                                                                                           **
* 輸入：無                                                                                                                               **
*                                                                                                                                              **
*電路鏈接：  共陽 (方向+/脫機+/PWM+連接在一起與電源或者是控制I/O相連)                        **
*                                              |               |                                                                               **
*                    方向脈沖 P1.0---|               |----P1.3 key1                                                                                    
*                   PWM脈沖 P1.1---|               |----P1.4 key2
*                    脫機脈沖 P1.2---|               |----P1.5 key3                                                                           
*                                              |               |
* 創作時間：2014.3.25
* 創作人：  huaer  周-華
***************************************************************/
#include < reg51.h >
sbit C = P1^0; //方向脈沖
sbit D = P1^1; //pwm脈沖
sbit E = P1^2; //脫機脈沖
sbit key1 = P1^3; //方向開關
sbit key2 = P1^4; //加速開關
sbit key3 = P1^5; //減速開關
void delay(unsigned int d)
{
   unsigned char i;
   for ( ; d>0; d--)
     for ( i=30; i>0; i--);
}
void main ( void )
{
 unsigned char  v1 = 1;//速度標志\空占比調節
 unsigned char  z = 0;
 while( 1 )
 {
  if ( key1 == 0 )
  {
    delay(100);
    if(key1 == 0)
    {
     while( ~key1 );
   z = 1;  //反轉（默認下正轉）
    }
  }
  else z = 0;
  if( key2 == 0)
  {
     delay(100);
     if(key2 == 0)
       {
       while( ~key2 );
    ++v1;
    }
  }
  if( key3 == 0)
  {
     delay(100);
     if(key3 == 0)
       {
       while( ~key3 );
       --v1;
    }
  }
  if( z == 1)
  {
     C = 0;
     delay(1);
     D = 0;
     delay( v1 );
     D = 1;
     delay( v1 );
     /*
     D = 0;
     delay( v1 );
     E = 0;
     delay( v2 );
     E = 1;
     */
  }
  else {
 
     D = 0;
     delay( v1 );
     D = 1;
     delay( v1 );
     /*
     D = 0;
     delay( v1 );
     E = 0;
     delay( v2 );
     E = 1;
     */
 
 
  }
 }
}

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