usbkeyboard.c

使用89S52为核心做的USB键盘,注意修改了一下windows设备描述符以及端点处理等就行了。用了一个4*4的小键盘,有0-9十个数字键, Num Lock键,Caps Lock键,Shift键,

		   switch (Control_Data.DeviceRequest.bRequest)
		    {
	         case  0: get_status(1);break;
			  case 6: get_descriptor_interface();break;
		     case 10: get_interface();break;
	         default: break;
			}
		 break;

		 case 2:  //到端点
		  {
	       if(Control_Data.DeviceRequest.bRequest==0)get_status(2);  
		  }
		 default: break;
	    }
	   break;

	   case 0x20:  //类请求
       Prints("USB类请求................................",1);
	   switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
	    {
		 case 0:  //到设备
		   switch (Control_Data.DeviceRequest.bRequest)
		    {
			 default:break;
		    }
		 break;

		 case 1:  //到接口
		   switch (Control_Data.DeviceRequest.bRequest)
		    {

	  		 case   GET_REPORT: get_report();   break; //获取报告
             case     GET_IDLE: get_idle();     break; //获取空闲状态
             case GET_PROTOCOL: get_protocol(); break; //获取协议
	         default: break;
			}
		 break;

		 case 2:  //到端点
		  {
		   switch (Control_Data.DeviceRequest.bRequest)
		    {
	         default: break;
			}  
		  }
		 default: break;
	    }
	   break;

	   case 0x40:  //用户请求
       Prints("USB用户请求................................",1);
	   switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
	    {
		 case 0:  //到设备
		   switch (Control_Data.DeviceRequest.bRequest)
		    {
			 default: break;
		    }
	     break;

		 case 1:   //到接口
		   switch (Control_Data.DeviceRequest.bRequest)
		    {
	         default: break;
			}
         break;

		 case 2:  //到端点
		  {
		   switch (Control_Data.DeviceRequest.bRequest)
		    {
	         default: break;
			}  
		  }
		 default: break;
	    }
	}
    return;
  }

  //如果是输出请求包
 if(usb_flags.flags.setup_packet_out) 
  {
    switch(Control_Data.DeviceRequest.bmRequestType&0x60)
	 {
	   case 0x00:  //标准请求
	   Prints("USB标准请求................................",1);
	   switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
	    {
		 case 0:   //到设备
	     switch (Control_Data.DeviceRequest.bRequest)
	      {
		   case     CLEAR_FEATURE: clear_feature(0);break;
		   case       SET_FEATURE: set_feature(0);break;
		   case       SET_ADDRESS: set_usb_address();break;          //set_address	           
		   case    SET_DESCRIPTOR: set_descriptor();break;           //set_descriptor
		   case SET_CONFIGURATION: set_configuration(); break;       //set_configurat               	          
	  	   default: break;
		  }
		 break;
		 
		 case 1:   //到接口
	      switch (Control_Data.DeviceRequest.bRequest)
		   {
		    case CLEAR_FEATURE:  clear_feature(1);break;
		    case   SET_FEATURE:  set_feature(1); break;
	        case SET_INTERFACE: set_interface();break;
		    default: break;
	        }
		 break;
		 
		 case 2:   //到端点
		  switch (Control_Data.DeviceRequest.bRequest)
		   {
		    case CLEAR_FEATURE: clear_feature(2);break;
		    case   SET_FEATURE: set_feature(2);break;
	        default: break;      
		   }
		 break;

		 default: break;
	    }
      break;

	  case 0x20:  //类请求
      Prints("USB类请求................................",1);
	   switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
	    {
		 case 0:    //接收者为设备
	     switch (Control_Data.DeviceRequest.bRequest)
	      {             	          
	  	   default: break;
		  }
		 break;

		 case 1:   //接收者为接口
	      switch (Control_Data.DeviceRequest.bRequest)
		   {
            case   SET_REPORT: set_report();   break; //设置报告
            case     SET_IDLE: set_idle();     break; //设置空闲
            case SET_PROTOCOL: set_protocol(); break; //设置协议
		    default: break;
	        }
		 
		 break;

		 case 2:   //接收者为端点
		  switch (Control_Data.DeviceRequest.bRequest)
		   {
	        default: break;      
		   }
		 break;
		 
		 case 3: //其它接收者
		  switch (Control_Data.DeviceRequest.bRequest)
		   {
	        default: break;      
		   }break;
		   		  
		 default: break;
	    }      
	   break;

       case 0x40:  //用户请求
	   Prints("USB用户请求................................",1);
	   switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
	    {
		 case 0:    //接收者为设备
	     switch (Control_Data.DeviceRequest.bRequest)
	      {             	          
	  	   default: break;
		  }
		 break;
		 
		 case 1:   //接收者为接口
	      switch (Control_Data.DeviceRequest.bRequest)
		   {
		    default: break;
	        }
	     break;
		 
		 case 2:   //接收者为端点
		  switch (Control_Data.DeviceRequest.bRequest)
		   {
	        default: break;      
		   }
		 break;
		 
		 case 3: //其它接收者
		  switch (Control_Data.DeviceRequest.bRequest)
		   {
	        default: break;      
		   }		   
		 break;
		   		  
		 default: break;
	    }
	}
  }
}
/******************************************************************************/

/**********************端点1输出***********************************************/
/*void endp1_out(void)
{
 Prints("端点1输出................................",1);
}*/
/******************************************************************************/

/*************************端点1输入*****************************************/
/*void endp1_in(void)
{
 Prints("端点1输入................................",1);
}*/
/******************************************************************************/

/***************************端点2输出****************************************/
void endp2_out(void)
{
 uint8 i,j;

 j=read_endpoint_buff(4,64,buffer);
 P2=~buffer[0];
 Prints("端点2输出................................",1);
 Prints("    端点2的数据是  ",0);
 for(i=0;i<j;i++)
  {
   PrintHex(buffer[i]);
   if(i==16)Prints("",1);
  }
 Prints("",1);
}
/******************************************************************************/


//用来返回数据的缓冲
uint8 idata InBuffer[64];

/***************************统计x中有多少个bit为1*******************************/
uint8 Count1Bits(uint16 x)
{
 uint8 i;

 i=0;
 while(x)
  {
   if(x&0x8000)i++;
   x<<=1;
  }
 return i;
}
/******************************************************************************/

/****************************主端点输入处理************************************/
void endp2_in(void)                                      
{
 uint8 i;
// Prints("端点2输入................................",1);
 KeyMapCanChange=0;  //禁止修改按键值 
 if(KeyMapOk) //如果有按键按下
  {
   //4*4的键盘，最多能够识别3个键同时按下，
   //如果开关上接二极管可以同时识别更多的键
   if(Count1Bits(KeyMapOk)>3) 
    {
	 for(i=2;i<8;i++)InBuffer[i]=0x01;  //按键过多
	}
   else
    {
     if(KeyMapOk&(1<<3)) //左Ctrl键
      {
       InBuffer[0]|=1;
      }
     else
      {
       InBuffer[0]&=~1;
      }
	
     if(KeyMapOk&(1<<7)) //左shift键
      {
       InBuffer[0]|=1<<1;
      }
     else
      {
       InBuffer[0]&=~(1<<1);
      }
	
     if(KeyMapOk&(1<<2)) //左ALT键
      {
       InBuffer[0]|=1<<2;
      }
     else
      {
	   InBuffer[0]&=~(1<<2);
	  }
	 i=2;
	 if(KeyMapOk&(1))
	  {
	   InBuffer[i++]=0x28;	    //回车键
	  }
	 if(KeyMapOk&(1<<1))
	  {
	   InBuffer[i++]=0x62;	    //0键
	  }
	 if(KeyMapOk&(1<<4))
	  {
	   InBuffer[i++]=0x5B;	    //3键
	  }
	 if(KeyMapOk&(1<<5))
	  {
	   InBuffer[i++]=0x5A;	    //2键
	  }
	 if(KeyMapOk&(1<<6))
	  {
	   InBuffer[i++]=0x59;	    //1键
	  }
	 if(KeyMapOk&(1<<8))
	  {
	   InBuffer[i++]=0x5E;	    //6键
	  }
	 if(KeyMapOk&(1<<9))
	  {
	   InBuffer[i++]=0x5D;	    //5键
	  }
	 if(KeyMapOk&(1<<10))
	  {
	   InBuffer[i++]=0x5C;	    //4键
	  }
	 if(KeyMapOk&(1<<11))
	  {
	   InBuffer[i++]=0x39;	    //Caps Lock键
	  }
	 if(KeyMapOk&(1<<12))
	  {
	   InBuffer[i++]=0x61;	    //9键
	  }
	 if(KeyMapOk&(1<<13))
	  {
	   InBuffer[i++]=0x60;	    //8键
	  }
	 if(KeyMapOk&(1<<14))
	  {
	   InBuffer[i++]=0x5F;	    //2键
	  }
	 if(KeyMapOk&(1<<15))
	  {
	   InBuffer[i++]=0x53;	    //Num Lock键
	  }
	 for(;i<8;i++)
	  {
	   InBuffer[i]=0;  //多余的清0
	  }
	}
  }
 else //如果无按键按下，则返回0
  {
   for(i=0;i<8;i++)
    {
	 InBuffer[i]=0;
	}
  }
 KeyMapCanChange=1; //允许修改按键值
//返回8个字节数据
 write_endpoint_buff(5,8,InBuffer);
}
/******************************************************************************/


/***************************主函数**********************************************/
void main(void)
{
 InitUART();  //串口初始化
 Printc(0x0c);  //清屏
 Printc(0x0c);
 Prints("系统启动................................",1);
 delay(1000);	 //延迟
 disconnect_usb(); 	   //断开USB连接
 init_usb();		   //初始化USB芯片
 connect_usb();		   //连接USB
 InitTimer0();  //定时器0初始化，用来做键盘扫描，定时时间大约为5ms
 KeyMapCanChange=1;
 while(1)
  { 
   if(!USB_INT)		//中断产生
    {
  	 read_interrupt_register();
	 if(Interrupt_Register.Interrupt.bus_reset){usb_bus_reset();continue;}
	 if(Interrupt_Register.Interrupt.suspend_change){usb_bus_suspend();continue;}
     if(Interrupt_Register.Interrupt.control_out_port){endp0_out();continue;}
	 if(Interrupt_Register.Interrupt.control_in_port&&usb_flags.flags.usb_endp0_in){endp0_in();continue;}
//	 if(Interrupt_Register.Interrupt.port_out_1)endp1_out();
//	 if(Interrupt_Register.Interrupt.port_in_1)endp1_in();
	 if(Interrupt_Register.Interrupt.main_out_port){endp2_out();}
	 if(Interrupt_Register.Interrupt.main_in_port){endp2_in();}
    }
  }
}
/******************************************************************************/