C++ Endpoint_ClearIN函数代码示例

/** Handler for the CMD_RESET_PROTECTION command, implemented as a dummy ACK function as
 *  no target short-circuit protection is currently implemented.
 */
static void V2Protocol_ResetProtection(void)
{
	Endpoint_ClearOUT();

	if ( use_libusb == true ) {
		Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM__LIBUSB);

	} else {
		Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM__DEFAULT);
	}

	Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);

	Endpoint_Write_8(CMD_RESET_PROTECTION);
	Endpoint_Write_8(STATUS_CMD_OK);
	Endpoint_ClearIN();
}

void HUB_Task(void)
{
	Endpoint_SelectEndpoint(1);

	if (Endpoint_IsReadWriteAllowed())
	{
		if (hub_int_response) {
			if (hub_int_force_data0) {
				Endpoint_ResetDataToggle();
				hub_int_force_data0 = 0;
			}
			Endpoint_Write_Byte(hub_int_response);
			Endpoint_ClearIN();
			hub_int_response = 0x00;
		}
	}
}

void HID_Task(void)
{
	/* Device must be connected and configured for the task to run */
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return;

	Endpoint_SelectEndpoint(GENERIC_OUT_EPADDR);

	/* Check to see if a packet has been sent from the host */
	if (Endpoint_IsOUTReceived())
	{
		/* Check to see if the packet contains data */
		if (Endpoint_IsReadWriteAllowed())
		{
			/* Create a temporary buffer to hold the read in report from the host */
			uint8_t GenericData[GENERIC_REPORT_SIZE];

			/* Read Generic Report Data */
			Endpoint_Read_Stream_LE(&GenericData, sizeof(GenericData), NULL);

			/* Process Generic Report Data */
			ProcessGenericHIDReport(GenericData);
		}

		/* Finalize the stream transfer to send the last packet */
		Endpoint_ClearOUT();
	}

	Endpoint_SelectEndpoint(GENERIC_IN_EPADDR);

	/* Check to see if the host is ready to accept another packet */
	if (Endpoint_IsINReady())
	{
		/* Create a temporary buffer to hold the report to send to the host */
		uint8_t GenericData[GENERIC_REPORT_SIZE];

		/* Create Generic Report Data */
		CreateGenericHIDReport(GenericData);

		/* Write Generic Report Data */
		Endpoint_Write_Stream_LE(&GenericData, sizeof(GenericData), NULL);

		/* Finalize the stream transfer to send the last packet */
		Endpoint_ClearIN();
	}
}

/** Handler for unknown V2 protocol commands. This discards all sent data and returns a
 *  STATUS_CMD_UNKNOWN status back to the host.
 *
 *  \param[in] V2Command  Issued V2 Protocol command byte from the host
 */
static void V2Protocol_UnknownCommand(const uint8_t V2Command)
{
	/* Discard all incoming data */
	while (Endpoint_BytesInEndpoint() == AVRISP_DATA_EPSIZE)
	{
		Endpoint_ClearOUT();
		Endpoint_WaitUntilReady();
	}

	Endpoint_ClearOUT();
	Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
	Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);

	Endpoint_Write_8(V2Command);
	Endpoint_Write_8(STATUS_CMD_UNKNOWN);
	Endpoint_ClearIN();
}

void uart_send(uint8_t d) {
	do {
		if (usb_txpacket_leftb) {
			Endpoint_SelectEndpoint(CDC_TX_EPNUM);
		        Endpoint_Write_Byte(d);
		        usb_txpacket_leftb--;
		        if (usb_txpacket_leftb == 1) {
		                Endpoint_ClearIN(); /* Go data, GO. */
		        	usb_txpacket_leftb = 0;
		        }
		        return;
		}
		usb_process();
		if (CDC_Device_SendByte_Prep(&VirtualSerial_CDC_Interface) == 0)
			usb_txpacket_leftb = CDC_IN_EPSIZE;
	} while (1);
}

void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
{
	if (!(Endpoint_IsSETUPReceived()))
	  return;
	  
	if (USB_ControlRequest.wIndex != CDCInterfaceInfo->Config.ControlInterfaceNumber)
	  return;

	switch (USB_ControlRequest.bRequest)
	{
		case REQ_GetLineEncoding:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				Endpoint_Write_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
				Endpoint_ClearOUT();
			}
			
			break;
		case REQ_SetLineEncoding:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				Endpoint_Read_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
				Endpoint_ClearIN();

				EVENT_CDC_Device_LineEncodingChanged(CDCInterfaceInfo);
			}
	
			break;
		case REQ_SetControlLineState:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{				
				Endpoint_ClearSETUP();
				
				CDCInterfaceInfo->State.ControlLineStates.HostToDevice = USB_ControlRequest.wValue;
				
				EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);

				Endpoint_ClearStatusStage();
			}
	
			break;
	}
}

/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity
 *  on the selected Logical Unit (drive), as a number of OS-sized blocks.
 */
static void SCSI_Command_Read_Capacity_10(void)
{
	/* Send the total number of logical blocks in the current LUN */
	Endpoint_Write_DWord_BE(LUN_MEDIA_BLOCKS - 1);

	/* Send the logical block size of the device (must be 512 bytes) */
	Endpoint_Write_DWord_BE(VIRTUAL_MEMORY_BLOCK_SIZE);

	/* Check if the current command is being aborted by the host */
	if (IsMassStoreReset)
	  return;

	/* Send the endpoint data packet to the host */
	Endpoint_ClearIN();

	/* Succeed the command and update the bytes transferred counter */
	CommandBlock.DataTransferLength -= 8;
}

uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
                                    const MIDI_EventPacket_t* const Event)
{
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;

	uint8_t ErrorCode;

	Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpoint.Address);

	if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL)) != ENDPOINT_RWSTREAM_NoError)
	  return ErrorCode;

	if (!(Endpoint_IsReadWriteAllowed()))
	  Endpoint_ClearIN();

	return ENDPOINT_RWSTREAM_NoError;
}

/** Handler for the XPROG ENTER_PROGMODE command to establish a connection with the attached device. */
static void XPROGProtocol_EnterXPROGMode(void)
{
	Endpoint_ClearOUT();
	Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
	Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);

	bool NVMBusEnabled = false;

	if (XPROG_SelectedProtocol == XPROG_PROTOCOL_PDI)
	  NVMBusEnabled = XMEGANVM_EnablePDI();
	else if (XPROG_SelectedProtocol == XPROG_PROTOCOL_TPI)
	  NVMBusEnabled = TINYNVM_EnableTPI();

	Endpoint_Write_8(CMD_XPROG);
	Endpoint_Write_8(XPROG_CMD_ENTER_PROGMODE);
	Endpoint_Write_8(NVMBusEnabled ? XPROG_ERR_OK : XPROG_ERR_FAILED);
	Endpoint_ClearIN();
}

void RNDIS_Device_ProcessControlRequest(USB_ClassInfo_RNDIS_Device_t* const RNDISInterfaceInfo)
{
	if (!(Endpoint_IsSETUPReceived()))
	  return;
	  
	if (USB_ControlRequest.wIndex != RNDISInterfaceInfo->Config.ControlInterfaceNumber)
	  return;

	switch (USB_ControlRequest.bRequest)
	{
		case REQ_SendEncapsulatedCommand:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();

				Endpoint_Read_Control_Stream_LE(RNDISInterfaceInfo->State.RNDISMessageBuffer, USB_ControlRequest.wLength);
				Endpoint_ClearIN();

				RNDIS_Device_ProcessRNDISControlMessage(RNDISInterfaceInfo);
			}
			
			break;
		case REQ_GetEncapsulatedResponse:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();

				RNDIS_Message_Header_t* MessageHeader = (RNDIS_Message_Header_t*)&RNDISInterfaceInfo->State.RNDISMessageBuffer;

				if (!(MessageHeader->MessageLength))
				{
					RNDISInterfaceInfo->State.RNDISMessageBuffer[0] = 0;
					MessageHeader->MessageLength = 1;
				}

				Endpoint_Write_Control_Stream_LE(RNDISInterfaceInfo->State.RNDISMessageBuffer, MessageHeader->MessageLength);				
				Endpoint_ClearOUT();

				MessageHeader->MessageLength = 0;
			}
	
			break;
	}
}

/** Handler for the XPROG READ_MEMORY command to read data from a specific address space within the
 *  attached device.
 */
static void XPROGProtocol_ReadMemory(void)
{
	uint8_t ReturnStatus = XPROG_ERR_OK;

	struct
	{
		uint8_t  MemoryType;
		uint32_t Address;
		uint16_t Length;
	} ReadMemory_XPROG_Params;

	Endpoint_Read_Stream_LE(&ReadMemory_XPROG_Params, sizeof(ReadMemory_XPROG_Params), NULL);
	ReadMemory_XPROG_Params.Address = SwapEndian_32(ReadMemory_XPROG_Params.Address);
	ReadMemory_XPROG_Params.Length  = SwapEndian_16(ReadMemory_XPROG_Params.Length);

	Endpoint_ClearOUT();
	Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
	Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);

	uint8_t ReadBuffer[256];

	if (XPROG_SelectedProtocol == XPROG_PROTOCOL_PDI)
	{
		/* Read the PDI target's memory, indicate timeout if occurred */
		if (!(XMEGANVM_ReadMemory(ReadMemory_XPROG_Params.Address, ReadBuffer, ReadMemory_XPROG_Params.Length)))
		  ReturnStatus = XPROG_ERR_TIMEOUT;
	}
	else
	{
		/* Read the TPI target's memory, indicate timeout if occurred */
		if (!(TINYNVM_ReadMemory(ReadMemory_XPROG_Params.Address, ReadBuffer, ReadMemory_XPROG_Params.Length)))
		  ReturnStatus = XPROG_ERR_TIMEOUT;
	}

	Endpoint_Write_8(CMD_XPROG);
	Endpoint_Write_8(XPROG_CMD_READ_MEM);
	Endpoint_Write_8(ReturnStatus);

	if (ReturnStatus == XPROG_ERR_OK)
	  Endpoint_Write_Stream_LE(ReadBuffer, ReadMemory_XPROG_Params.Length, NULL);

	Endpoint_ClearIN();
}

/** Command processing for an issued SCSI REQUEST SENSE command. This command returns information about the last issued command,
 *  including the error code and additional error information so that the host can determine why a command failed to complete.
 */
static void SCSI_Command_Request_Sense(void)
{
	uint8_t  AllocationLength = CommandBlock.SCSICommandData[4];
	uint8_t  BytesTransferred = (AllocationLength < sizeof(SenseData))? AllocationLength : sizeof(SenseData);
	
	/* Send the SENSE data - this indicates to the host the status of the last command */
	Endpoint_Write_Stream_LE(&SenseData, BytesTransferred, StreamCallback_AbortOnMassStoreReset);
	
	uint8_t PadBytes[AllocationLength - BytesTransferred];
	
	/* Pad out remaining bytes with 0x00 */
	Endpoint_Write_Stream_LE(&PadBytes, sizeof(PadBytes), StreamCallback_AbortOnMassStoreReset);

	/* Finalize the stream transfer to send the last packet */
	Endpoint_ClearIN();

	/* Succeed the command and update the bytes transferred counter */
	CommandBlock.DataTransferLength -= BytesTransferred;
}

/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
 *  the device from the USB host before passing along unhandled control requests to the library for processing
 *  internally.
 */
void EVENT_USB_Device_ControlRequest(void)
{
	/* Process RNDIS class commands */
	switch (USB_ControlRequest.bRequest)
	{
		case RNDIS_REQ_SendEncapsulatedCommand:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();

				/* Read in the RNDIS message into the message buffer */
				Endpoint_Read_Control_Stream_LE(RNDISMessageBuffer, USB_ControlRequest.wLength);
				Endpoint_ClearIN();

				/* Process the RNDIS message */
				ProcessRNDISControlMessage();
			}

			break;
		case RNDIS_REQ_GetEncapsulatedResponse:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				/* Check if a response to the last message is ready */
				if (!(MessageHeader->MessageLength))
				{
					/* Set the response to a single 0x00 byte to indicate that no response is ready */
					RNDISMessageBuffer[0] = 0;
					MessageHeader->MessageLength = 1;
				}

				Endpoint_ClearSETUP();

				/* Write the message response data to the endpoint */
				Endpoint_Write_Control_Stream_LE(RNDISMessageBuffer, MessageHeader->MessageLength);
				Endpoint_ClearOUT();

				/* Reset the message header once again after transmission */
				MessageHeader->MessageLength = 0;
			}

			break;
	}
}

/** Handler for the CMD_SIGN_ON command, returning the programmer ID string to the host. */
static void V2Protocol_SignOn(void)
{
	Endpoint_ClearOUT();

	if ( use_libusb == true ) {
		Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM__LIBUSB);

	} else {
		Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM__DEFAULT);
	}

	Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);

	Endpoint_Write_8(CMD_SIGN_ON);
	Endpoint_Write_8(STATUS_CMD_OK);
	Endpoint_Write_8(sizeof(PROGRAMMER_ID) - 1);
	Endpoint_Write_Stream_LE(PROGRAMMER_ID, (sizeof(PROGRAMMER_ID) - 1), NULL);
	Endpoint_ClearIN();
}

uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
{
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;

	uint8_t ErrorCode;

	Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpoint.Address);

	if (Endpoint_BytesInEndpoint())
	{
		Endpoint_ClearIN();

		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
		  return ErrorCode;
	}

	return ENDPOINT_READYWAIT_NoError;
}