}
   }
    
    switch(ep0State)
    {	
		case EP0_STATE_INIT:
		    break; 
		// GET_DESCRIPTOR:DEVICE
    	case EP0_STATE_GD_DEV_0:
            DbgPrintf("[GDD0]");
            WrPktEp0((UINT8T *)&descDev+0,8); 					//EP0_PKT_SIZE
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_DEV_1;
            break;
    	case EP0_STATE_GD_DEV_1:
            DbgPrintf("[GDD1]");
            WrPktEp0((UINT8T *)&descDev+0x8,8); 
            SET_EP0_IN_PKT_RDY();
            
            ep0State=EP0_STATE_GD_DEV_2;
            break;
    	case EP0_STATE_GD_DEV_2:
            DbgPrintf("[GDD2]");
            WrPktEp0((UINT8T *)&descDev+0x10,2);   				//8+8+2=0x12
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;
            break;

        //=== GET_DESCRIPTOR:CONFIGURATION+INTERFACE+ENDPOINT0+ENDPOINT1 ===
        //Windows98 gets these 4 descriptors all together by issuing only a request.
        //Windows2000 gets each descriptor seperately.
    	case EP0_STATE_GD_CFG_0:
            DbgPrintf("[GDC0]");
            WrPktEp0((UINT8T *)&descConf+0,8); 					//EP0_PKT_SIZE
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_CFG_1;
            break;
    	case EP0_STATE_GD_CFG_1:
            DbgPrintf("[GDC1]");
            WrPktEp0((UINT8T *)&descConf+8,1); 
            WrPktEp0((UINT8T *)&descIf+0,7); 
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_CFG_2;
            break;
    	case EP0_STATE_GD_CFG_2:
            DbgPrintf("[GDC2]");
            WrPktEp0((UINT8T *)&descIf+7,2); 
            WrPktEp0((UINT8T *)&descEndpt0+0,6); 
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_CFG_3;
            break;
    	case EP0_STATE_GD_CFG_3:
            DbgPrintf("[GDC3]");
            WrPktEp0((UINT8T *)&descEndpt0+6,1); 
            WrPktEp0((UINT8T *)&descEndpt1+0,7); 
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_CFG_4;            
            break;
    	case EP0_STATE_GD_CFG_4:
            DbgPrintf("[GDC4]");
            //zero length data packit 
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;            
            break;

        // GET_DESCRIPTOR:CONFIGURATION ONLY 
    	case EP0_STATE_GD_CFG_ONLY_0:
            DbgPrintf("[GDCO0]");
            WrPktEp0((UINT8T *)&descConf+0,8); 					//EP0_PKT_SIZE
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_CFG_ONLY_1;
            break;
    	case EP0_STATE_GD_CFG_ONLY_1:
            DbgPrintf("[GDCO1]");
            WrPktEp0((UINT8T *)&descConf+8,1); 
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;            
            break;

        // GET_DESCRIPTOR:INTERFACE ONLY 
    	case EP0_STATE_GD_IF_ONLY_0:
            DbgPrintf("[GDI0]");
            WrPktEp0((UINT8T *)&descIf+0,8); 
            SET_EP0_IN_PKT_RDY();
            ep0State=EP0_STATE_GD_IF_ONLY_1;
            break;
    	case EP0_STATE_GD_IF_ONLY_1:
            DbgPrintf("[GDI1]");
            WrPktEp0((UINT8T *)&descIf+8,1); 
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;            
            break;

        // GET_DESCRIPTOR:ENDPOINT 0 ONLY 
    	case EP0_STATE_GD_EP0_ONLY_0:
            DbgPrintf("[GDE00]");
            WrPktEp0((UINT8T *)&descEndpt0+0,7); 
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;            
            break;
            
        // GET_DESCRIPTOR:ENDPOINT 1 ONLY 
    	case EP0_STATE_GD_EP1_ONLY_0:
            DbgPrintf("[GDE10]");
            WrPktEp0((UINT8T *)&descEndpt1+0,7); 
            SET_EP0_INPKTRDY_DATAEND();
            ep0State=EP0_STATE_INIT;            
            break;
 
        // GET_DESCRIPTOR:STRING  
    	case EP0_STATE_GD_STR_I0:
            DbgPrintf("[GDS0_0]");
		    WrPktEp0((UINT8T *)descStr0, 4 );  
		    SET_EP0_INPKTRDY_DATAEND();
		    ep0State=EP0_STATE_INIT;     
		    ep0SubState=0;
		    break;
		case EP0_STATE_GD_STR_I1:
            DbgPrintf("[GDS1_%d]",ep0SubState);
            if( (ep0SubState*EP0_PKT_SIZE+EP0_PKT_SIZE)<sizeof(descStr1) )
            {
            	WrPktEp0((UINT8T *)descStr1+(ep0SubState*EP0_PKT_SIZE),EP0_PKT_SIZE); 
            	SET_EP0_IN_PKT_RDY();
            	ep0State=EP0_STATE_GD_STR_I1;
            	ep0SubState++;
           }
		    else
		    {
		    	WrPktEp0((UINT8T *)descStr1+(ep0SubState*EP0_PKT_SIZE),
		    		 sizeof(descStr1)-(ep0SubState*EP0_PKT_SIZE)); 
				SET_EP0_INPKTRDY_DATAEND();
				ep0State=EP0_STATE_INIT;     
				ep0SubState=0;
		   }
		    break;

		case EP0_STATE_GD_STR_I2:
            DbgPrintf("[GDS2_%d]",ep0SubState);
            if( (ep0SubState*EP0_PKT_SIZE+EP0_PKT_SIZE)<sizeof(descStr2) )
            {
            	WrPktEp0((UINT8T *)descStr2+(ep0SubState*EP0_PKT_SIZE),EP0_PKT_SIZE); 
            	SET_EP0_IN_PKT_RDY();
            	ep0State=EP0_STATE_GD_STR_I2;
            	ep0SubState++;
           }
		    else
		    {
                DbgPrintf("[E]");
		    	WrPktEp0((UINT8T *)descStr2+(ep0SubState*EP0_PKT_SIZE),
		    		 sizeof(descStr2)-(ep0SubState*EP0_PKT_SIZE)); 
				SET_EP0_INPKTRDY_DATAEND();
				ep0State=EP0_STATE_INIT;     
				ep0SubState=0;
		   }
		    break;
     	default:
		    DbgPrintf("UE:G?D");
	    	    break;
   }
}

/*********************************************************************************************
* name:		PrintEp0Pkt
* func:		Print the Ep0's packet 
* para:		UINT8T *pt	--	pointer to Ep0's packet
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void PrintEp0Pkt(UINT8T *pt)
{
    int i;
    DbgPrintf("[RCV:");
    for(i=0;i<EP0_PKT_SIZE;i++)
        DbgPrintf("%x,",pt[i]);
    DbgPrintf("]");
}

/*********************************************************************************************
* name:		InitDescriptorTable
* func:		Initialization of USB Descriptor Table 
* para:		none 
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void InitDescriptorTable(void)
{	
    //Standard device descriptor
    descDev.bLength=0x12;										//EP0_DEV_DESC_SIZE=0x12 bytes    
    descDev.bDescriptorType=DEVICE_TYPE;         
    descDev.bcdUSBL=0x10;
    descDev.bcdUSBH=0x01;										//Ver 1.10
    descDev.bDeviceClass=0xFF;									//0x0          
    descDev.bDeviceSubClass=0x0;          
    descDev.bDeviceProtocol=0x0;          
    descDev.bMaxPacketSize0=0x8;         
    descDev.idVendorL=0x45;
    descDev.idVendorH=0x53;
    descDev.idProductL=0x34;
    descDev.idProductH=0x12;
    descDev.bcdDeviceL=0x00;
    descDev.bcdDeviceH=0x01;
    descDev.iManufacturer=0x1;									//index of string descriptor
    descDev.iProduct=0x2;										//index of string descriptor 
    descDev.iSerialNumber=0x0;
    descDev.bNumConfigurations=0x1;

    //Standard configuration descriptor
    descConf.bLength=0x9;    
    descConf.bDescriptorType=CONFIGURATION_TYPE;         
    descConf.wTotalLengthL=0x20;								//<cfg desc>+<if desc>+<endp0 desc>+<endp1 desc>
    descConf.wTotalLengthH=0;
    descConf.bNumInterfaces=1;
	//dbg    descConf.bConfigurationValue=2;  why 2? There's no reason.
    descConf.bConfigurationValue=1;  
    descConf.iConfiguration=0;
    descConf.bmAttributes=CONF_ATTR_DEFAULT;					//bus powered only.
    descConf.maxPower=25;										//draws 50mA current from the USB bus.          

    //Standard interface descriptor
    descIf.bLength=0x9;    
    descIf.bDescriptorType=INTERFACE_TYPE;         
    descIf.bInterfaceNumber=0x0;
    descIf.bAlternateSetting=0x0;								
    descIf.bNumEndpoints=2;										//# of endpoints except EP0
    descIf.bInterfaceClass=0xff;								//0x0 ?
    descIf.bInterfaceSubClass=0x0;  
    descIf.bInterfaceProtocol=0x0;
    descIf.iInterface=0x0;

    //Standard endpoint0 descriptor
    descEndpt0.bLength=0x7;    
    descEndpt0.bDescriptorType=ENDPOINT_TYPE;         
    descEndpt0.bEndpointAddress=1|EP_ADDR_IN;					// 2400Xendpoint 1 is IN endpoint.
    descEndpt0.bmAttributes=EP_ATTR_BULK;
    descEndpt0.wMaxPacketSizeL=EP1_PKT_SIZE;					//64
    descEndpt0.wMaxPacketSizeH=0x0;
    descEndpt0.bInterval=0x0;									//not used

    //Standard endpoint1 descriptor
    descEndpt1.bLength=0x7;    
    descEndpt1.bDescriptorType=ENDPOINT_TYPE;         
    descEndpt1.bEndpointAddress=3|EP_ADDR_OUT;					// 2400X endpoint 3 is OUT endpoint.
    descEndpt1.bmAttributes=EP_ATTR_BULK;
    descEndpt1.wMaxPacketSizeL=EP3_PKT_SIZE;					//64
    descEndpt1.wMaxPacketSizeH=0x0;
    descEndpt1.bInterval=0x0;									//not used 
}