uint receive_deco(void) //解碼
{
 uchar j,k1=0,k2=0;
 uint w_receive;


  for(j=16;j;j--)
  {
   gas_led=1;
   while(!wireless_in)//如果接收引腳是低電平 則計時
   {     
    delay_50us(1);//計算有幾個50us
    k1++;
    k2++;
   }
   
   while(wireless_in))//如果接收引腳是高電平 則計時

   {
    delay_50us(1);
    k2++;
   }
   
   if((k2>30)&&(k2<=46)&&(k1<=(k2/3)))//1500us~2300us
   {
    if((k1>6)&&(k1<=11))
    {//300~550us
     w_receive&=0xfffe;
            w_receive<<=1;
    }
    if((k1>=24)&&(k1<36))
    {//1200~1800us
     w_receive|=0x0001;
            w_receive<<=1; 
    }
   }
 return="return"  w_receive;  
}
/////////////////////////////////////////////////
//接收頭碼、地址和數據
////////////////////////////////////////////////
uint wireless_receive(void) //reentrant//使此函數可重入
{ //接收遙控碼(解碼程序)
 uint="uint"  re_data,i=0,j=0;
 
//檢測50ms內有沒有編碼接收,因為發送完十六位數據需要1500*16=24ms 頭碼11ms 延時300us
    while(!wireless_in)
    {
     delay_50us(1);
     i++;
    }
 if((i>=180)&&(i<=260))
 {//如果有9--13毫秒左右的頭碼 則看延時時間
    while(wireless_in)
  {
   delay_50us(1);
   j++;
  }
  if((j>6)&&(j<=11))
  {//有300--550微秒左右的低電平延時
     re_data=receive_deco(); //解碼   
   return re_data;
  }
  else
  {
   re_data=0x0000;
  }
 }
 else
 {
  re_data=0x0000;
 }
 return re_data;
}