usb_core.c

ST的ARM7芯片完整DEMO程序。 具备点阵液晶显示器

	NAME:	DataStageIn
	INPUT:	none
	OUTPUT:
	DESCRIPTION:
		Data stage of a Control Read Transfer
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
void DataStageIn(void)
{
	ENDPOINT_INFO	*pEPinfo = &pInformation->Ctrl_Info;
	WORD	save_wLength = pEPinfo->Usb_wLength;
	BYTE	ControlState;

	BYTE	*DataBuffer;
	WORD	Length;
	int i;
    DWORD *pTxBuff;
    WORD wTra;
 	union {
		BYTE *bTra;
    	WORD *wTra;
	}pBuf;
	
	
	if (save_wLength == 0) { /* no more data to send so STALL the TX Status*/
		ControlState = WAIT_STATUS_OUT;
		vSetEPTxStatus(EP_TX_STALL);
		goto Expect_Status_Out;
	}

	Length = pEPinfo->PacketSize;
	ControlState = (save_wLength < Length) ? LAST_IN_DATA : IN_DATA;

	

	/* Same as UsbWrite */
	if (Length > save_wLength)
		Length = save_wLength;

	DataBuffer = (*pEPinfo->CopyData)(Length);
    /* transfer data from buffer to PMA */
    pTxBuff = (DWORD *)(PMAAddr + (BYTE *)(_GetEPTxAddr(ENDP0)*2));
    pBuf.wTra = &wTra;
    for(i=0;i < Length;)
    {
    	*(pBuf.bTra  ) = *DataBuffer++;
    	i++;
    	*(pBuf.bTra+1) = *DataBuffer++;
    	i++;
    	*pTxBuff = wTra;
    	pTxBuff++;
    }

	_SetEPTxCount(ENDP0, Length);

	pEPinfo->Usb_wLength -= Length;
	pEPinfo->Usb_wOffset += Length;
	vSetEPTxStatus(EP_TX_VALID);

	USB_StatusOut();/* Expect the host to abort the data IN stage */

	
Expect_Status_Out:
	pInformation->ControlState = ControlState;
}/* DataStageIn */

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	NAME:	NoData_Setup0
	INPUT:
	OUTPUT:	none
	DESCRIPTION:
		Proceed the processing of setup request without data stage
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
void NoData_Setup0()
{
	DEVICE_INFO	*pInfo = pInformation;
	RESULT	Result = USB_SUCCESS;
	BYTE	RequestNo = pInformation->USBbRequest;
	BYTE	ControlState;
	

	if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT)) {/* Device Request*/
		
		/* SET_CONFIGURATION*/
	        if (RequestNo == SET_CONFIGURATION)
			Result = Standard_SetConfiguration();
	
		/*SET ADDRESS*/
		else if (RequestNo == SET_ADDRESS){
			if(pInfo->USBwValue0 > 127 || pInfo->USBwValue1!=0
				||pInfo->USBwIndex!=0 || pInfo->Current_Configuration!=0) /* Device Address should be 127 or less*/
											  /*call Beck spec USB 2.0*/
				{		
				ControlState = STALLED;
				goto exit_NoData_Setup0;
				}
			else Result = USB_SUCCESS;
			}
		/*SET FEATURE for Device*/
		else if (RequestNo == SET_FEATURE){
				if (pInfo->USBwValue0==DEVICE_REMOTE_WAKEUP && pInfo->USBwIndex==0 && pInfo->Supp_Remote_Wakeup==1)
				Result = Standard_SetDeviceFeature();
				else
				Result = UNSUPPORT;
			}
		/*Clear FEATURE for Device */
		else if (RequestNo == CLEAR_FEATURE){
			if (pInfo->USBwValue0==DEVICE_REMOTE_WAKEUP && pInfo->USBwIndex==0 && pInfo->Supp_Remote_Wakeup==1)
			Result = Standard_ClearFeature();
			else
			Result = UNSUPPORT;
		}

         }
	
	/* Interface Request*/

	else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT)) {	
			
			/*SET INTERFACE*/
			if (RequestNo == SET_INTERFACE)
				Result = Standard_SetInterface();
	}

	
	/* EndPoint Request*/

	else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT)) {
			/*CLEAR FEATURE for EndPoint*/
			if (RequestNo == CLEAR_FEATURE)
			 Result = Standard_ClearFeature();
			/* SET FEATURE for EndPoint*/
			 else if (RequestNo == SET_FEATURE){
				Result = Standard_SetEndPointFeature();
			}
	}
	else
			Result = UNSUPPORT;


	if (Result != USB_SUCCESS) {
		Result = (*pProperty->Class_NoData_Setup)(RequestNo);
		if (Result == NOT_READY) {
			ControlState = PAUSE;
			goto exit_NoData_Setup0;
		}
	}

	if (Result != USB_SUCCESS) {
		ControlState = STALLED;
		goto exit_NoData_Setup0;
	}

	ControlState = WAIT_STATUS_IN;/* After no data stage SETUP */

	USB_StatusIn();

exit_NoData_Setup0:
	pInfo->ControlState = ControlState;
	return;
} /* NoData_Setup0 */


/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	NAME:	Data_Setup0
	INPUT:
	OUTPUT:	none
	DESCRIPTION:
		Proceed the processing of setup request with data stage
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
void Data_Setup0()
{
	DEVICE_INFO		*pInfo = pInformation;
	DEVICE_PROP		*pProp = pProperty;
	BYTE	*(*CopyRoutine)(WORD);
	RESULT	Result;
	BYTE Request_No = pInfo->USBbRequest;
	BYTE *pbLen;
	BYTE Related_Endpoint,Reserved;
	WORD	wOffset,wLen,Status;



	CopyRoutine = NULL;
	wOffset = 0;

	if (Request_No == GET_DESCRIPTOR) {
		if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT)) {
			BYTE wValue1 = pInfo->USBwValue1;
			if (wValue1 == DEVICE_DESCRIPTOR)
				CopyRoutine = pProp->GetDeviceDescriptor;
			else if (wValue1 == CONFIG_DESCRIPTOR)
				CopyRoutine = pProp->GetConfigDescriptor;
			else if (wValue1 == STRING_DESCRIPTOR) {
				wOffset = pInfo->USBwValue0;
				CopyRoutine = pProp->GetStringDescriptor;
			}		/* End of GET_DESCRIPTOR */
		}
	}

	/*GET STATUS*/
	else if (Request_No == GET_STATUS && pInfo->USBwValue==0 && pInfo->USBwLength == 0x0002 && pInfo->USBwIndex1==0) {
			/* GET STATUS for Device*/
		if (Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT) && pInfo->USBwIndex==0) {
			CopyRoutine = Standard_GetStatus;
		}
		
			/* GET STATUS for Interface*/
		else if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT)){
			if ((*pProp->Class_Get_Interface_Setting)(pInfo->USBwIndex0,0)==USB_SUCCESS && pInfo->Current_Configuration!=0)
					 CopyRoutine = Standard_GetStatus;
		}
		
			/* GET STATUS for EndPoint*/
		else if (Type_Recipient == (STANDARD_REQUEST | ENDPOINT_RECIPIENT)){

			Related_Endpoint = (pInfo->USBwIndex0 & 0x0f);
			Reserved= pInfo->USBwIndex0 & 0x70;

			if (ValBit(pInfo->USBwIndex0, 7)) Status =_GetEPTxStatus(Related_Endpoint);// get Status of endpoint & stall the request if
												   // the related_ENdpoint is Disabled
			else Status =_GetEPRxStatus(Related_Endpoint);
	
			

			if(Related_Endpoint < Device_Table.Total_Endpoint && Reserved==0 && Status != 0)
					CopyRoutine = Standard_GetStatus;
		}


	}
		/*GET CONFIGURATION*/
	else if (Request_No == GET_CONFIGURATION) {
		if ( Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT) )
			CopyRoutine = Standard_GetConfiguration;
	}
		/*GET INTERFACE*/
	else if (Request_No == GET_INTERFACE) {
		if (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT) && pInfo->Current_Configuration!=0
		   && pInfo->USBwValue==0 && pInfo->USBwIndex1==0 && pInfo->USBwLength == 0x0001
		   && (*pProperty->Class_Get_Interface_Setting)(pInfo->USBwIndex0,0)==USB_SUCCESS)			
			CopyRoutine = Standard_GetInterface;
			
	}


	if (CopyRoutine) {
		pInfo->Ctrl_Info.Usb_wOffset = wOffset;
		pInfo->Ctrl_Info.CopyData = CopyRoutine;
		/* sb in the original the cast to word was directly */
		/* now the cast is made step by step */
		pbLen = (*CopyRoutine)(0);
		wLen = (WORD)((DWORD)pbLen);
		pInfo->Ctrl_Info.Usb_wLength = wLen;
		Result = USB_SUCCESS;
	}
	else {
		Result = (*pProp->Class_Data_Setup)(pInfo->USBbRequest);
		if (Result == NOT_READY) {
			pInfo->ControlState = PAUSE;
			return;
		}
	}

	if (pInfo->Ctrl_Info.Usb_wLength == 255) {	/* Data is not ready, wait it */
		pInfo->ControlState = PAUSE;
		return;
	}
	if (Result == UNSUPPORT || pInfo->Ctrl_Info.Usb_wLength == 0) {
		/* Unsupported request */
		pInfo->ControlState = STALLED;
		return;
	}


	if (ValBit(pInfo->USBbmRequestType, 7)) {
		/* Device ==> Host */
		WORD	wLength = pInfo->USBwLength;

		/* Restrict the data length to be the one host asks */
		if (pInfo->Ctrl_Info.Usb_wLength > wLength)
			pInfo->Ctrl_Info.Usb_wLength = wLength;

		pInfo->Ctrl_Info.PacketSize = pProp->MaxPacketSize;
		DataStageIn();
	}
	else {
		pInfo->ControlState = OUT_DATA;
		vSetEPRxStatus(EP_RX_VALID);/* enable for next data reception */	
	}

	return;
} /* Data_Setup0 */

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	NAME:	Setup0_Process
	INPUT:
	OUTPUT:	none
	DESCRIPTION:
		Get the device request data and dispatch to individual process
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
BYTE Setup0_Process()
{
	DEVICE_INFO	*pInfo = pInformation;
	union {
		BYTE*	b;
		WORD*	w;
	} pBuf;
/* sb	pBuf.b = pProperty->RxEP_buffer; */
		pBuf.b = PMAAddr + (BYTE *)(_GetEPRxAddr(ENDP0)*2); /* *2 for 32 bits addr */

	if (pInfo->ControlState != PAUSE) {
		pInfo->USBbmRequestType = *pBuf.b++;	/* bmRequestType */
		pInfo->USBbRequest		= *pBuf.b++;	/* bRequest */
		pBuf.w++;  /* sb word not accessed because of 32 bits addressing */
		pInfo->USBwValue		= ByteSwap(*pBuf.w++);	/* wValue */
		pBuf.w++;  /* word not accessed because of 32 bits addressing */
		pInfo->USBwIndex		= ByteSwap(*pBuf.w++);	/* wIndex */
		pBuf.w++;  /* word not accessed because of 32 bits addressing */
/* sb		pInfo->USBwLength		= ByteSwap(*pBuf.w);*/	/* wLength */
		pInfo->USBwLength		= *pBuf.w;	/* wLength */
	}
//	vSetEPTxStatus(EP_TX_NAK);
	pInfo->ControlState	= SETTING_UP;
	
	if (pInfo->USBwLength == 0)
	{	/* No data statge processing */
		NoData_Setup0();
	}
	else {			/* Setup with data stage */
		Data_Setup0();
	}
	return Post0_Process();
} /* Setup0_Process */

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	NAME:	In0_Process
	INPUT:
	OUTPUT:	none
	DESCRIPTION:
		Process the IN token on all default endpoint
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
BYTE In0_Process()
{
	DEVICE_INFO	*pInfo = pInformation;
	BYTE	ControlState = pInfo->ControlState;
	
	if (ControlState == IN_DATA || ControlState == LAST_IN_DATA)
	{
		DataStageIn();
		ControlState = pInfo->ControlState; /* may be changed outside the function */
	}
	
	else if (ControlState == WAIT_STATUS_IN) {
		if (pInfo->USBbRequest == SET_ADDRESS &&
				Type_Recipient == (STANDARD_REQUEST | DEVICE_RECIPIENT) )
		{
			SetDeviceAddress(pInfo->USBwValue0);
		}
		(*pProperty->Process_Status_IN)();
		ControlState = STALLED;
	}
		
	else
	ControlState = STALLED;

	pInfo->ControlState = ControlState;

	return Post0_Process();
} /* In0_Process */

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	NAME:	Out0_Process
	INPUT:
	OUTPUT:	none
	DESCRIPTION:
		Process the OUT token on all default endpoint
 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
BYTE Out0_Process()
{
	DEVICE_INFO	*pInfo = pInformation;
	BYTE	ControlState = pInfo->ControlState;
	
	if(ControlState == OUT_DATA || ControlState == LAST_OUT_DATA)
		DataStageOut();

	else if (ControlState == WAIT_STATUS_OUT) {
		(*pProperty->Process_Status_OUT)();	
		ControlState = STALLED;
		}

	else if (ControlState == IN_DATA || ControlState == LAST_IN_DATA) {
		/* host aborts the transfer before finish */
				ControlState = STALLED;
	}


	/* Unexpect state, STALL the endpoint */
	else {
		
		ControlState = STALLED;
	}

	pInfo->ControlState = ControlState;

	return Post0_Process();
} /* Out0_Process */

/*============================================================================*/
/*============================================================================*/
BYTE Post0_Process()
{
	SetEPRxCount(ENDP0, STD_MAXPACKETSIZE);

	if (pInformation->ControlState == STALLED) {
		vSetEPRxStatus(EP_RX_STALL);
		vSetEPTxStatus(EP_TX_STALL);
	}
/*
 * Since the SIE will receive SETUP even in NAK state
 * There is no need to enable the receiver again
*/

	return (pInformation->ControlState == PAUSE);
} /* Post0_Process */

/***************************************************************************
BYTE DescriptorBuffer[128];
BYTE *SetDeviceDescriptor(WORD Length)
{
	if (Length == 0)
		return (BYTE*)sizeof(DescriptorBuffer);

	return DescriptorBuffer + pInfomation->Ctrl_Info.Usb_rOffset;
}
***************************************************************************/
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
void SetDeviceAddress(BYTE Val)
{
  int i;
  DEVICE *pDevice = &Device_Table;
/*  BYTE	EP0 = pDevice->EP0;	*/
  int	nEP = pDevice->Total_Endpoint;

	/* set address in every used endpoint */
	for(i=0;i<nEP;i++)
	{
		_SetEPAddress((BYTE)i, (BYTE)i);
	} /* for */
	_SetDADDR(Val|DADDR_EF); /* set device address and enable function */
} /* SetDeviceAddress */

/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
void NOP_Process(void)
{
}

/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/