sl811.c

本程序是基于单片机C8051F020上使用SL811 USB 总线接口实现检测U 盘的功能。插上U 盘

		{
			usbstack.pid  = PID_IN;	
			
			if(!usbXfer())
				return FALSE;
			//usbstack.wPayload = 0;
			usbstack.pid  = PID_OUT;
		}
		else											// device-to-host : OUT token
   		{							
			usbstack.pid  = PID_OUT;
				
			if(!usbXfer())
				return FALSE;
			usbstack.pid  = PID_IN;
		}
	}
	DelayMs(10);
	//----------------------------------------------------
	// Status stage IN or OUT zero-length data packet
	//----------------------------------------------------
	usbstack.wLen=0;
	if(!usbXfer())
		return FALSE;

	return TRUE;											
					
}


unsigned char epBulkSend(unsigned char *pBuffer,unsigned int len)
{
	usbstack.usbaddr=0x1;
	usbstack.endpoint=usbstack.epbulkout;
	usbstack.pid=PID_OUT;
	usbstack.wPayload=64;
	usbstack.wLen=len;
	usbstack.buffer=pBuffer;
	while(len>0)
	{
		if (len > usbstack.wPayload)
			usbstack.wLen = usbstack.wPayload;
		else				
			usbstack.wLen = len;	
		if(!usbXfer())
			return FALSE;
		len-=usbstack.wLen;
		usbstack.buffer=usbstack.buffer+usbstack.wLen;
		DelayUs(10);
	}
	return TRUE;	
}

unsigned char epBulkRcv(unsigned char *pBuffer,unsigned int len)
{
	usbstack.usbaddr=0x1;
	usbstack.endpoint=usbstack.epbulkin;
	usbstack.pid=PID_IN;
	usbstack.wPayload=64;
	usbstack.wLen=len;
	usbstack.buffer=pBuffer;
	if(usbstack.wLen)
	{
		if(!usbXfer())
			return FALSE;
	}
	return TRUE;
}
//*****************************************************************************************
// Control endpoint
//*****************************************************************************************
//void VendorCmd(void)
//{ 
//      ep0Xfer();
//}

//*****************************************************************************************
// Set Device Address : 
//*****************************************************************************************


unsigned char SetAddress(unsigned char addr)
{
	usbstack.usbaddr=0;
	usbstack.setup.bmRequest=0;
	usbstack.setup.bRequest=SET_ADDRESS;
	usbstack.setup.wValue=addr;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=0;
	//usbstack.buffer=&usbstack.setup;
	return ep0Xfer();

}

//*****************************************************************************************
// Set Device Configuration : 
//*****************************************************************************************


unsigned char Set_Configuration(void)
{
	//usbstack.usbaddr=usbaddr;
	//usbstack.
	usbstack.setup.bmRequest=0;
	usbstack.setup.bRequest=SET_CONFIG;
	//usbstack.setup.wValue=wVal;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=0;
	usbstack.buffer=NULL;
	return ep0Xfer();

}

//*****************************************************************************************
// Get Device Descriptor : Device, Configuration, String
//*****************************************************************************************
unsigned char GetDesc(void)
{ 
	
	usbstack.setup.bmRequest=0x80;
	usbstack.setup.bRequest=GET_DESCRIPTOR;
	usbstack.setup.wValue=WordSwap(usbstack.setup.wValue);
	
	usbstack.wPayload=uDev.wPayLoad[0];
	//usbstack.buffer=&usbstack.setup;
	return ep0Xfer();
}

//*****************************************************************************************
// USB Data Endpoint Read/Write
// wLen is in low byte first format
//*****************************************************************************************

unsigned char DataRW(BYTE epaddr)
{
	//xdata BYTE pid = PID_OUT;

	usbstack.pid=PID_OUT;
	usbstack.endpoint=epaddr&0x0F;
	
	if(epaddr & 0x80)	// get direction of transfer
		usbstack.pid = PID_IN;				
	
	if(usbXfer())
		return TRUE;

	return FALSE;
}


//*****************************************************************************************
// USB Device Enumeration Process
// Support 1 confguration and interface #0 and alternate setting #0 only
// Support up to 1 control endpoint + 4 data endpoint only
//*****************************************************************************************


unsigned char EnumUsbDev(BYTE usbaddr)
{  
	unsigned char i;											// always reset USB transfer address 
	unsigned char uAddr = 0;							// for enumeration to Address #0
	unsigned char epLen;
//	unsigned short strLang;
	
	pDevDesc  pDev;	
	pCfgDesc pCfg;
	pIntfDesc pIfc;
	pEPDesc pEnp;
	//------------------------------------------------
	// Reset only Slave device attached directly
	//------------------------------------------------
	uDev.wPayLoad[0] = 64;	// default 64-byte payload of Endpoint 0, address #0
	if(usbaddr == 1)		// bus reset for the device attached to SL811HS only
		USBReset();		// that will always have the USB address = 0x01 (for a hub)
    	
    	DelayMs(25);
	
	//i = SL811Read(EP0Status);	
	//i=SL811Read(IntStatus);
	//------------------------------------------------
	// Get USB Device Descriptors on EP0 & Addr 0
	// with default 64-byte payload
	//------------------------------------------------
	pDev =(pDevDesc)DBUF;					// ask for 64 bytes on Addr #0
	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=DEVICE;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=18;
	//usbstack.setup.wLength=sbstack.setup.wLength);
	usbstack.buffer=DBUF;
	
	if (!GetDesc())			// and determine the wPayload size
		return FALSE;								// get correct wPayload of Endpoint 0
	uDev.wPayLoad[0]=pDev->bMaxPacketSize0;// on current non-zero USB address

	//------------------------------------------------
	// Set Slave USB Device Address
	//------------------------------------------------
	if (!SetAddress(usbaddr)) 						// set to specific USB address
		return FALSE;								//
	uAddr = usbaddr;								// transfer using this new address

	//------------------------------------------------
	// Get USB Device Descriptors on EP0 & Addr X
	//------------------------------------------------
	pDev =(pDevDesc)DBUF;
	usbstack.usbaddr=uAddr;
	
	usbstack.setup.wLength=pDev->bLength;
	usbstack.setup.wValue=DEVICE;
	usbstack.setup.wIndex=0;
	
	//usbstack.setup.wLength=0x12;//(unsigned short)DBUF[0];//pDev->bLength;
	usbstack.buffer=DBUF;
	
	if (!GetDesc()) 	
		return FALSE;								// For this current device:
	uDev.wVID  = pDev->idVendor;			// save VID
	uDev.wPID  = pDev->idProduct;			// save PID
	uDev.iMfg  = pDev->iManufacturer;		// save Mfg Index
	uDev.iPdt  = pDev->iProduct;			// save Product Index

	//------------------------------------------------
	// Get String Descriptors
	//------------------------------------------------
	/*
	pStr = (pStrDesc)DBUF;	
	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=STRING;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=4;
	usbstack.buffer=DBUF;
	
	if (!GetDesc()) 			// Get string language
		return FALSE;								

	strLang = pStr->wLang;	
	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=(unsigned short)(uDev.iMfg<<8)|STRING;
	usbstack.setup.wIndex=strLang;
	usbstack.setup.wLength=4;
	usbstack.buffer=DBUF;	
						// get iManufacturer String length
	if (!GetDesc()) 		
		return FALSE;	
	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=(unsigned short)(uDev.iMfg<<8)|STRING;
	usbstack.setup.wIndex=strLang;
	usbstack.setup.wLength=pStr->bLength;
	//usbstack.buffer=DBUF;	
							// get iManufacturer String descriptors
	if (!GetDesc()) 		
		return FALSE;			
	*/
	//------------------------------------------------
	// Get Slave USB Configuration Descriptors
	//------------------------------------------------
	
	pCfg = (pCfgDesc)DBUF;	
	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=CONFIGURATION;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=64;
	usbstack.buffer=DBUF;	
	if (!GetDesc()) 		
		return FALSE;	
	/*	
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=CONFIGURATION;
	usbstack.setup.wIndex=0;
	usbstack.setup.wLength=WordSwap(pCfg->wLength);
	
	usbstack.buffer=DBUF;	
	if (!GetDesc()) 	
		return FALSE;		
	*/
	
	pIfc = (pIntfDesc)(DBUF + 9);					// point to Interface Descp
	uDev.bClass 	= pIfc->iClass;			// update to class type
	uDev.bNumOfEPs = (pIfc->bEndPoints <= MAX_EP) ? pIfc->bEndPoints : MAX_EP;
	
	if(uDev.bClass==8) //mass storage device
		bXXGFlags.bits.bMassDevice=TRUE;
	//------------------------------------------------
	// Set configuration (except for HUB device)
	//------------------------------------------------
	usbstack.usbaddr=uAddr;
	usbstack.setup.wValue=DEVICE;
	//if (uDev[usbaddr].bClass!=HUBCLASS)				// enumerating a FS/LS non-hub device
		if (!Set_Configuration())		// connected directly to SL811HS
				return FALSE;

	//------------------------------------------------
	// For each slave endpoints, get its attributes
	// Excluding endpoint0, only data endpoints
	//------------------------------------------------
	
	epLen = 0;
	for (i=1; i<=uDev.bNumOfEPs; i++)				// For each data endpoint
	{
		pEnp = (pEPDesc)(DBUF + 9 + 9 + epLen);	   			// point to Endpoint Descp(non-HID)
		//if(pIfc->iClass == HIDCLASS)	
		//	pEnp = (pEPDesc)(DBUF + 9 + 9 + 9 + epLen);		// update pointer to Endpoint(HID)
		uDev.bEPAddr[i]  	= pEnp->bEPAdd;			// Ep address and direction
		uDev.bAttr[i]		= pEnp->bAttr;			// Attribute of Endpoint
		uDev.wPayLoad[i] 	= WordSwap(pEnp->wPayLoad);		// Payload of Endpoint
		uDev.bInterval[i] 	= pEnp->bInterval;		// Polling interval
	    	uDev.bData1[i] = 0;			            // init data toggle
		epLen += 7;