diff --git a/LUFA/Drivers/USB/Class/Host/Audio.c b/LUFA/Drivers/USB/Class/Host/Audio.c
index 72b17f33aadf709b211e0cd3d4ee0476ed57d63a..adcf162be46e03a19153a76789cc4e5595e219f6 100644
--- a/LUFA/Drivers/USB/Class/Host/Audio.c
+++ b/LUFA/Drivers/USB/Class/Host/Audio.c
@@ -103,7 +103,7 @@ uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfa
 
 		if (PipeNum == AudioInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_ISOCHRONOUS;
@@ -113,7 +113,7 @@ uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfa
 		}
 		else if (PipeNum == AudioInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_ISOCHRONOUS;
diff --git a/LUFA/Drivers/USB/Class/Host/CDC.c b/LUFA/Drivers/USB/Class/Host/CDC.c
index 701a7dc4e4a06a7ac95503a185a719e8d31fdd7c..2e83365e1256c092ccd4c1c6dfa0d38a37978879 100644
--- a/LUFA/Drivers/USB/Class/Host/CDC.c
+++ b/LUFA/Drivers/USB/Class/Host/CDC.c
@@ -110,7 +110,7 @@ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 
 		if (PipeNum == CDCInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_BULK;
@@ -121,7 +121,7 @@ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 		}
 		else if (PipeNum == CDCInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_BULK;
@@ -132,7 +132,7 @@ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 		}
 		else if (PipeNum == CDCInterfaceInfo->Config.NotificationPipeNumber)
 		{
-			Size            = NotificationEndpoint->EndpointSize;
+			Size            = le16_to_cpu(NotificationEndpoint->EndpointSize);
 			EndpointAddress = NotificationEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_INTERRUPT;
diff --git a/LUFA/Drivers/USB/Class/Host/HID.c b/LUFA/Drivers/USB/Class/Host/HID.c
index 94d09f356841e323433b6fee783923dcc756b742..08fb66677185d6bc45087fa5e21a4df80d7d1722 100644
--- a/LUFA/Drivers/USB/Class/Host/HID.c
+++ b/LUFA/Drivers/USB/Class/Host/HID.c
@@ -105,7 +105,7 @@ uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo
 
 		if (PipeNum == HIDInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_INTERRUPT;
@@ -119,7 +119,7 @@ uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo
 			if (DataOUTEndpoint == NULL)
 			  continue;
 		
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_INTERRUPT;
@@ -145,7 +145,7 @@ uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo
 	}
 
 	HIDInterfaceInfo->State.InterfaceNumber      = HIDInterface->InterfaceNumber;
-	HIDInterfaceInfo->State.HIDReportSize        = HIDDescriptor->HIDReportLength;
+	HIDInterfaceInfo->State.HIDReportSize        = LE16_TO_CPU(HIDDescriptor->HIDReportLength);
 	HIDInterfaceInfo->State.SupportsBootProtocol = (HIDInterface->SubClass != HID_CSCP_NonBootProtocol);
 	HIDInterfaceInfo->State.LargestReportSize    = 8;
 	HIDInterfaceInfo->State.IsActive             = true;
@@ -334,6 +334,9 @@ uint8_t HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInf
 {
 	uint8_t ErrorCode;
 
+	if (!(HIDInterfaceInfo->State.SupportsBootProtocol))
+	  return HID_ERROR_LOGICAL;
+
 	USB_ControlRequest = (USB_Request_Header_t)
 		{
 			.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
@@ -345,9 +348,6 @@ uint8_t HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInf
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
 
-	if (!(HIDInterfaceInfo->State.SupportsBootProtocol))
-	  return HID_ERROR_LOGICAL;
-
 	if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 	  return ErrorCode;
 
diff --git a/LUFA/Drivers/USB/Class/Host/MIDI.c b/LUFA/Drivers/USB/Class/Host/MIDI.c
index d376a301727c7d11550811c8afae02e6eedd7a2a..944ecc3e837fedd5426667ab6620baa003f24b1b 100644
--- a/LUFA/Drivers/USB/Class/Host/MIDI.c
+++ b/LUFA/Drivers/USB/Class/Host/MIDI.c
@@ -88,7 +88,7 @@ uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceI
 
 		if (PipeNum == MIDIInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_BULK;
@@ -98,7 +98,7 @@ uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceI
 		}
 		else if (PipeNum == MIDIInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_BULK;
diff --git a/LUFA/Drivers/USB/Class/Host/MassStorage.c b/LUFA/Drivers/USB/Class/Host/MassStorage.c
index 2b7d88ec8a01e71286698a8d87b2e6a284411e85..65ed6940e341efe874bc304017413186e8358658 100644
--- a/LUFA/Drivers/USB/Class/Host/MassStorage.c
+++ b/LUFA/Drivers/USB/Class/Host/MassStorage.c
@@ -88,7 +88,7 @@ uint8_t MS_Host_ConfigurePipes(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 		if (PipeNum == MSInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_BULK;
@@ -98,7 +98,7 @@ uint8_t MS_Host_ConfigurePipes(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 		}
 		else if (PipeNum == MSInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_BULK;
@@ -175,8 +175,8 @@ static uint8_t MS_Host_SendCommand(USB_ClassInfo_MS_Host_t* const MSInterfaceInf
 	if (++MSInterfaceInfo->State.TransactionTag == 0xFFFFFFFF)
 	  MSInterfaceInfo->State.TransactionTag = 1;
 
-	SCSICommandBlock->Signature = MS_CBW_SIGNATURE;
-	SCSICommandBlock->Tag       = MSInterfaceInfo->State.TransactionTag;
+	SCSICommandBlock->Signature = CPU_TO_LE32(MS_CBW_SIGNATURE);
+	SCSICommandBlock->Tag       = cpu_to_le32(MSInterfaceInfo->State.TransactionTag);
 
 	Pipe_SelectPipe(MSInterfaceInfo->Config.DataOUTPipeNumber);
 	Pipe_Unfreeze();
@@ -260,7 +260,7 @@ static uint8_t MS_Host_SendReceiveData(USB_ClassInfo_MS_Host_t* const MSInterfac
                                        void* BufferPtr)
 {
 	uint8_t  ErrorCode = PIPE_RWSTREAM_NoError;
-	uint16_t BytesRem  = SCSICommandBlock->DataTransferLength;
+	uint16_t BytesRem  = le32_to_cpu(SCSICommandBlock->DataTransferLength);
 
 	if (SCSICommandBlock->Flags & MS_COMMAND_DIR_DATA_IN)
 	{
@@ -358,7 +358,7 @@ uint8_t MS_Host_GetMaxLUN(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
 
-	if ((ErrorCode = USB_Host_SendControlRequest(MaxLUNIndex)) != HOST_SENDCONTROL_Successful)
+	if ((ErrorCode = USB_Host_SendControlRequest(MaxLUNIndex)) == HOST_SENDCONTROL_SetupStalled)
 	{
 		*MaxLUNIndex = 0;
 		ErrorCode    = HOST_SENDCONTROL_Successful;
@@ -378,7 +378,7 @@ uint8_t MS_Host_GetInquiryData(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = sizeof(SCSI_Inquiry_Response_t),
+			.DataTransferLength = CPU_TO_LE32(sizeof(SCSI_Inquiry_Response_t)),
 			.Flags              = MS_COMMAND_DIR_DATA_IN,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 6,
@@ -414,7 +414,7 @@ uint8_t MS_Host_TestUnitReady(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = 0,
+			.DataTransferLength = CPU_TO_LE32(0),
 			.Flags              = MS_COMMAND_DIR_DATA_IN,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 6,
@@ -451,7 +451,7 @@ uint8_t MS_Host_ReadDeviceCapacity(USB_ClassInfo_MS_Host_t* const MSInterfaceInf
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = sizeof(SCSI_Capacity_t),
+			.DataTransferLength = CPU_TO_LE32(sizeof(SCSI_Capacity_t)),
 			.Flags              = MS_COMMAND_DIR_DATA_IN,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 10,
@@ -475,8 +475,8 @@ uint8_t MS_Host_ReadDeviceCapacity(USB_ClassInfo_MS_Host_t* const MSInterfaceInf
 	if ((ErrorCode = MS_Host_SendCommand(MSInterfaceInfo, &SCSICommandBlock, DeviceCapacity)) != PIPE_RWSTREAM_NoError)
 	  return ErrorCode;
 
-	SwapEndian_n(&DeviceCapacity->Blocks,    sizeof(DeviceCapacity->Blocks));
-	SwapEndian_n(&DeviceCapacity->BlockSize, sizeof(DeviceCapacity->BlockSize));
+	DeviceCapacity->Blocks    = BE32_TO_CPU(DeviceCapacity->Blocks);
+	DeviceCapacity->BlockSize = BE32_TO_CPU(DeviceCapacity->BlockSize);
 
 	if ((ErrorCode = MS_Host_GetReturnedStatus(MSInterfaceInfo, &SCSICommandStatus)) != PIPE_RWSTREAM_NoError)
 	  return ErrorCode;
@@ -495,7 +495,7 @@ uint8_t MS_Host_RequestSense(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = sizeof(SCSI_Request_Sense_Response_t),
+			.DataTransferLength = CPU_TO_LE32(sizeof(SCSI_Request_Sense_Response_t)),
 			.Flags              = MS_COMMAND_DIR_DATA_IN,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 6,
@@ -532,7 +532,7 @@ uint8_t MS_Host_PreventAllowMediumRemoval(USB_ClassInfo_MS_Host_t* const MSInter
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = 0,
+			.DataTransferLength = CPU_TO_LE32(0),
 			.Flags              = MS_COMMAND_DIR_DATA_OUT,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 6,
@@ -572,7 +572,7 @@ uint8_t MS_Host_ReadDeviceBlocks(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = ((uint32_t)Blocks * BlockSize),
+			.DataTransferLength = cpu_to_le32((uint32_t)Blocks * BlockSize),
 			.Flags              = MS_COMMAND_DIR_DATA_IN,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 10,
@@ -616,7 +616,7 @@ uint8_t MS_Host_WriteDeviceBlocks(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo
 
 	MS_CommandBlockWrapper_t SCSICommandBlock = (MS_CommandBlockWrapper_t)
 		{
-			.DataTransferLength = ((uint32_t)Blocks * BlockSize),
+			.DataTransferLength = cpu_to_le32((uint32_t)Blocks * BlockSize),
 			.Flags              = MS_COMMAND_DIR_DATA_OUT,
 			.LUN                = LUNIndex,
 			.SCSICommandLength  = 10,
diff --git a/LUFA/Drivers/USB/Class/Host/Printer.c b/LUFA/Drivers/USB/Class/Host/Printer.c
index 290393ac5ffa17cb1a6534f57610363446a578d9..46dc1fa5fd1aa3231ee31f4ba6fe71b5eda6df88 100644
--- a/LUFA/Drivers/USB/Class/Host/Printer.c
+++ b/LUFA/Drivers/USB/Class/Host/Printer.c
@@ -88,7 +88,7 @@ uint8_t PRNT_Host_ConfigurePipes(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceI
 
 		if (PipeNum == PRNTInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_BULK;
@@ -98,7 +98,7 @@ uint8_t PRNT_Host_ConfigurePipes(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceI
 		}
 		else if (PipeNum == PRNTInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_BULK;
@@ -204,7 +204,6 @@ uint8_t PRNT_Host_GetPortStatus(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceIn
 		};
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
 	return USB_Host_SendControlRequest(PortStatus);
 }
 
@@ -220,7 +219,6 @@ uint8_t PRNT_Host_SoftReset(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo)
 		};
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
 	return USB_Host_SendControlRequest(NULL);
 }
 
@@ -407,7 +405,7 @@ uint8_t PRNT_Host_GetDeviceID(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo
 		return HOST_SENDCONTROL_Successful;
 	}
 
-	DeviceIDStringLength = SwapEndian_16(DeviceIDStringLength);
+	DeviceIDStringLength = be16_to_cpu(DeviceIDStringLength);
 
 	if (DeviceIDStringLength > BufferSize)
 	  DeviceIDStringLength = BufferSize;
diff --git a/LUFA/Drivers/USB/Class/Host/RNDIS.c b/LUFA/Drivers/USB/Class/Host/RNDIS.c
index a75adcc97d0c3f88ba2eca75ab69375887e92c14..2750260c5e175defc4cf6957f4bc9deac9e39237 100644
--- a/LUFA/Drivers/USB/Class/Host/RNDIS.c
+++ b/LUFA/Drivers/USB/Class/Host/RNDIS.c
@@ -112,7 +112,7 @@ uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfa
 
 		if (PipeNum == RNDISInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Size            = DataINEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataINEndpoint->EndpointSize);
 			EndpointAddress = DataINEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_BULK;
@@ -123,7 +123,7 @@ uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfa
 		}
 		else if (PipeNum == RNDISInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Size            = DataOUTEndpoint->EndpointSize;
+			Size            = le16_to_cpu(DataOUTEndpoint->EndpointSize);
 			EndpointAddress = DataOUTEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_OUT;
 			Type            = EP_TYPE_BULK;
@@ -134,7 +134,7 @@ uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfa
 		}
 		else if (PipeNum == RNDISInterfaceInfo->Config.NotificationPipeNumber)
 		{
-			Size            = NotificationEndpoint->EndpointSize;
+			Size            = le16_to_cpu(NotificationEndpoint->EndpointSize);
 			EndpointAddress = NotificationEndpoint->EndpointAddress;
 			Token           = PIPE_TOKEN_IN;
 			Type            = EP_TYPE_INTERRUPT;
@@ -241,6 +241,7 @@ static uint8_t RNDIS_SendEncapsulatedCommand(USB_ClassInfo_RNDIS_Host_t* const R
 		};
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+	
 	return USB_Host_SendControlRequest(Buffer);
 }
 
@@ -258,6 +259,7 @@ static uint8_t RNDIS_GetEncapsulatedResponse(USB_ClassInfo_RNDIS_Host_t* const R
 		};
 
 	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+	
 	return USB_Host_SendControlRequest(Buffer);
 }
 
@@ -268,9 +270,9 @@ uint8_t RNDIS_Host_SendKeepAlive(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfac
 	RNDIS_KeepAlive_Message_t  KeepAliveMessage;
 	RNDIS_KeepAlive_Complete_t KeepAliveMessageResponse;
 
-	KeepAliveMessage.MessageType     = REMOTE_NDIS_KEEPALIVE_MSG;
-	KeepAliveMessage.MessageLength   = sizeof(RNDIS_KeepAlive_Message_t);
-	KeepAliveMessage.RequestId       = RNDISInterfaceInfo->State.RequestID++;
+	KeepAliveMessage.MessageType     = CPU_TO_LE32(REMOTE_NDIS_KEEPALIVE_MSG);
+	KeepAliveMessage.MessageLength   = CPU_TO_LE32(sizeof(RNDIS_KeepAlive_Message_t));
+	KeepAliveMessage.RequestId       = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);
 
 	if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &KeepAliveMessage,
 	                                               sizeof(RNDIS_KeepAlive_Message_t))) != HOST_SENDCONTROL_Successful)
@@ -294,13 +296,13 @@ uint8_t RNDIS_Host_InitializeDevice(USB_ClassInfo_RNDIS_Host_t* const RNDISInter
 	RNDIS_Initialize_Message_t  InitMessage;
 	RNDIS_Initialize_Complete_t InitMessageResponse;
 
-	InitMessage.MessageType     = REMOTE_NDIS_INITIALIZE_MSG;
-	InitMessage.MessageLength   = sizeof(RNDIS_Initialize_Message_t);
-	InitMessage.RequestId       = RNDISInterfaceInfo->State.RequestID++;
+	InitMessage.MessageType     = CPU_TO_LE32(REMOTE_NDIS_INITIALIZE_MSG);
+	InitMessage.MessageLength   = CPU_TO_LE32(sizeof(RNDIS_Initialize_Message_t));
+	InitMessage.RequestId       = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);
 
-	InitMessage.MajorVersion    = REMOTE_NDIS_VERSION_MAJOR;
-	InitMessage.MinorVersion    = REMOTE_NDIS_VERSION_MINOR;
-	InitMessage.MaxTransferSize = RNDISInterfaceInfo->Config.HostMaxPacketSize;
+	InitMessage.MajorVersion    = CPU_TO_LE32(REMOTE_NDIS_VERSION_MAJOR);
+	InitMessage.MinorVersion    = CPU_TO_LE32(REMOTE_NDIS_VERSION_MINOR);
+	InitMessage.MaxTransferSize = cpu_to_le32(RNDISInterfaceInfo->Config.HostMaxPacketSize);
 
 	if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &InitMessage,
 	                                               sizeof(RNDIS_Initialize_Message_t))) != HOST_SENDCONTROL_Successful)
@@ -314,10 +316,10 @@ uint8_t RNDIS_Host_InitializeDevice(USB_ClassInfo_RNDIS_Host_t* const RNDISInter
 		return ErrorCode;
 	}
 
-	if (InitMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
+	if (InitMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))
 	  return RNDIS_ERROR_LOGICAL_CMD_FAILED;
 
-	RNDISInterfaceInfo->State.DeviceMaxPacketSize = InitMessageResponse.MaxTransferSize;
+	RNDISInterfaceInfo->State.DeviceMaxPacketSize = le32_to_cpu(InitMessageResponse.MaxTransferSize);
 
 	return HOST_SENDCONTROL_Successful;
 }
@@ -337,14 +339,14 @@ uint8_t RNDIS_Host_SetRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInter
 
 	RNDIS_Set_Complete_t SetMessageResponse;
 
-	SetMessageData.SetMessage.MessageType    = REMOTE_NDIS_SET_MSG;
-	SetMessageData.SetMessage.MessageLength  = sizeof(RNDIS_Set_Message_t) + Length;
-	SetMessageData.SetMessage.RequestId      = RNDISInterfaceInfo->State.RequestID++;
+	SetMessageData.SetMessage.MessageType    = CPU_TO_LE32(REMOTE_NDIS_SET_MSG);
+	SetMessageData.SetMessage.MessageLength  = cpu_to_le32(sizeof(RNDIS_Set_Message_t) + Length);
+	SetMessageData.SetMessage.RequestId      = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);
 
-	SetMessageData.SetMessage.Oid            = Oid;
-	SetMessageData.SetMessage.InformationBufferLength = Length;
-	SetMessageData.SetMessage.InformationBufferOffset = (sizeof(RNDIS_Set_Message_t) - sizeof(RNDIS_Message_Header_t));
-	SetMessageData.SetMessage.DeviceVcHandle = 0;
+	SetMessageData.SetMessage.Oid            = cpu_to_le32(Oid);
+	SetMessageData.SetMessage.InformationBufferLength = cpu_to_le32(Length);
+	SetMessageData.SetMessage.InformationBufferOffset = CPU_TO_LE32(sizeof(RNDIS_Set_Message_t) - sizeof(RNDIS_Message_Header_t));
+	SetMessageData.SetMessage.DeviceVcHandle = CPU_TO_LE32(0);
 
 	memcpy(&SetMessageData.ContiguousBuffer, Buffer, Length);
 
@@ -360,7 +362,7 @@ uint8_t RNDIS_Host_SetRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInter
 		return ErrorCode;
 	}
 
-	if (SetMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
+	if (SetMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))
 	  return RNDIS_ERROR_LOGICAL_CMD_FAILED;
 
 	return HOST_SENDCONTROL_Successful;
@@ -381,14 +383,14 @@ uint8_t RNDIS_Host_QueryRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInt
 		uint8_t                ContiguousBuffer[MaxLength];
 	} QueryMessageResponseData;
 
-	QueryMessage.MessageType    = REMOTE_NDIS_QUERY_MSG;
-	QueryMessage.MessageLength  = sizeof(RNDIS_Query_Message_t);
-	QueryMessage.RequestId      = RNDISInterfaceInfo->State.RequestID++;
+	QueryMessage.MessageType    = CPU_TO_LE32(REMOTE_NDIS_QUERY_MSG);
+	QueryMessage.MessageLength  = CPU_TO_LE32(sizeof(RNDIS_Query_Message_t));
+	QueryMessage.RequestId      = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);
 
-	QueryMessage.Oid            = Oid;
-	QueryMessage.InformationBufferLength = 0;
-	QueryMessage.InformationBufferOffset = 0;
-	QueryMessage.DeviceVcHandle = 0;
+	QueryMessage.Oid            = cpu_to_le32(Oid);
+	QueryMessage.InformationBufferLength = CPU_TO_LE32(0);
+	QueryMessage.InformationBufferOffset = CPU_TO_LE32(0);
+	QueryMessage.DeviceVcHandle = CPU_TO_LE32(0);
 
 	if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &QueryMessage,
 	                                               sizeof(RNDIS_Query_Message_t))) != HOST_SENDCONTROL_Successful)
@@ -402,7 +404,7 @@ uint8_t RNDIS_Host_QueryRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInt
 		return ErrorCode;
 	}
 
-	if (QueryMessageResponseData.QueryMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
+	if (QueryMessageResponseData.QueryMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))
 	  return RNDIS_ERROR_LOGICAL_CMD_FAILED;
 
 	memcpy(Buffer, &QueryMessageResponseData.ContiguousBuffer, MaxLength);
@@ -456,7 +458,7 @@ uint8_t RNDIS_Host_ReadPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceIn
 		return ErrorCode;
 	}
 
-	*PacketLength = (uint16_t)DeviceMessage.DataLength;
+	*PacketLength = (uint16_t)le32_to_cpu(DeviceMessage.DataLength);
 
 	Pipe_Discard_Stream(DeviceMessage.DataOffset -
 	                    (sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t)),
@@ -484,10 +486,10 @@ uint8_t RNDIS_Host_SendPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceIn
 	RNDIS_Packet_Message_t DeviceMessage;
 
 	memset(&DeviceMessage, 0, sizeof(RNDIS_Packet_Message_t));
-	DeviceMessage.MessageType   = REMOTE_NDIS_PACKET_MSG;
-	DeviceMessage.MessageLength = (sizeof(RNDIS_Packet_Message_t) + PacketLength);
-	DeviceMessage.DataOffset    = (sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t));
-	DeviceMessage.DataLength    = PacketLength;
+	DeviceMessage.MessageType   = CPU_TO_LE32(REMOTE_NDIS_PACKET_MSG);
+	DeviceMessage.MessageLength = CPU_TO_LE32(sizeof(RNDIS_Packet_Message_t) + PacketLength);
+	DeviceMessage.DataOffset    = CPU_TO_LE32(sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t));
+	DeviceMessage.DataLength    = cpu_to_le32(PacketLength);
 
 	Pipe_SelectPipe(RNDISInterfaceInfo->Config.DataOUTPipeNumber);
 	Pipe_Unfreeze();
diff --git a/LUFA/Drivers/USB/Class/Host/StillImage.c b/LUFA/Drivers/USB/Class/Host/StillImage.c
index c1a6cacbd92b544f7a3217d470a87cfa4e21ed94..be83497b27a5d8cdfa0e636ef4acd46fde0bd079 100644
--- a/LUFA/Drivers/USB/Class/Host/StillImage.c
+++ b/LUFA/Drivers/USB/Class/Host/StillImage.c
@@ -202,7 +202,7 @@ uint8_t SI_Host_SendBlockHeader(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo,
 	  return PIPE_RWSTREAM_DeviceDisconnected;
 
 	if (SIInterfaceInfo->State.IsSessionOpen)
-	  PIMAHeader->TransactionID = SIInterfaceInfo->State.TransactionID++;
+	  PIMAHeader->TransactionID = cpu_to_le32(SIInterfaceInfo->State.TransactionID++);
 
 	Pipe_SelectPipe(SIInterfaceInfo->Config.DataOUTPipeNumber);
 	Pipe_Unfreeze();
@@ -274,7 +274,7 @@ uint8_t SI_Host_ReceiveBlockHeader(USB_ClassInfo_SI_Host_t* const SIInterfaceInf
 
 	Pipe_Read_Stream_LE(PIMAHeader, PIMA_COMMAND_SIZE(0), NULL);
 
-	if (PIMAHeader->Type == PIMA_CONTAINER_ResponseBlock)
+	if (PIMAHeader->Type == CPU_TO_LE16(PIMA_CONTAINER_ResponseBlock))
 	{
 		uint8_t ParamBytes = (PIMAHeader->DataLength - PIMA_COMMAND_SIZE(0));
 
@@ -377,10 +377,10 @@ uint8_t SI_Host_OpenSession(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo)
 
 	PIMA_Container_t PIMABlock = (PIMA_Container_t)
 		{
-			.DataLength    = PIMA_COMMAND_SIZE(1),
-			.Type          = PIMA_CONTAINER_CommandBlock,
-			.Code          = 0x1002,
-			.Params        = {1},
+			.DataLength    = CPU_TO_LE32(PIMA_COMMAND_SIZE(1)),
+			.Type          = CPU_TO_LE16(PIMA_CONTAINER_CommandBlock),
+			.Code          = CPU_TO_LE16(0x1002),
+			.Params        = {CPU_TO_LE32(1)},
 		};
 
 	if ((ErrorCode = SI_Host_SendBlockHeader(SIInterfaceInfo, &PIMABlock)) != PIPE_RWSTREAM_NoError)
@@ -389,7 +389,7 @@ uint8_t SI_Host_OpenSession(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo)
 	if ((ErrorCode = SI_Host_ReceiveBlockHeader(SIInterfaceInfo, &PIMABlock)) != PIPE_RWSTREAM_NoError)
 	  return ErrorCode;
 
-	if ((PIMABlock.Type != PIMA_CONTAINER_ResponseBlock) || (PIMABlock.Code != 0x2001))
+	if ((PIMABlock.Type != CPU_TO_LE16(PIMA_CONTAINER_ResponseBlock)) || (PIMABlock.Code != CPU_TO_LE16(0x2001)))
 	  return SI_ERROR_LOGICAL_CMD_FAILED;
 
 	SIInterfaceInfo->State.IsSessionOpen = true;
@@ -406,10 +406,10 @@ uint8_t SI_Host_CloseSession(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo)
 
 	PIMA_Container_t PIMABlock = (PIMA_Container_t)
 		{
-			.DataLength    = PIMA_COMMAND_SIZE(1),
-			.Type          = PIMA_CONTAINER_CommandBlock,
-			.Code          = 0x1003,
-			.Params        = {1},
+			.DataLength    = CPU_TO_LE32(PIMA_COMMAND_SIZE(1)),
+			.Type          = CPU_TO_LE16(PIMA_CONTAINER_CommandBlock),
+			.Code          = CPU_TO_LE16(0x1003),
+			.Params        = {CPU_TO_LE32(1)},
 		};
 
 	if ((ErrorCode = SI_Host_SendBlockHeader(SIInterfaceInfo, &PIMABlock)) != PIPE_RWSTREAM_NoError)
@@ -420,7 +420,7 @@ uint8_t SI_Host_CloseSession(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo)
 
 	SIInterfaceInfo->State.IsSessionOpen = false;
 
-	if ((PIMABlock.Type != PIMA_CONTAINER_ResponseBlock) || (PIMABlock.Code != 0x2001))
+	if ((PIMABlock.Type != CPU_TO_LE16(PIMA_CONTAINER_ResponseBlock)) || (PIMABlock.Code != CPU_TO_LE16(0x2001)))
 	  return SI_ERROR_LOGICAL_CMD_FAILED;
 
 	return PIPE_RWSTREAM_NoError;
@@ -438,9 +438,9 @@ uint8_t SI_Host_SendCommand(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo,
 
 	PIMA_Container_t PIMABlock = (PIMA_Container_t)
 		{
-			.DataLength    = PIMA_COMMAND_SIZE(TotalParams),
-			.Type          = PIMA_CONTAINER_CommandBlock,
-			.Code          = Operation,
+			.DataLength    = cpu_to_le32(PIMA_COMMAND_SIZE(TotalParams)),
+			.Type          = CPU_TO_LE16(PIMA_CONTAINER_CommandBlock),
+			.Code          = cpu_to_le16(Operation),
 		};
 
 	memcpy(&PIMABlock.Params, Params, sizeof(uint32_t) * TotalParams);
@@ -462,7 +462,7 @@ uint8_t SI_Host_ReceiveResponse(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo)
 	if ((ErrorCode = SI_Host_ReceiveBlockHeader(SIInterfaceInfo, &PIMABlock)) != PIPE_RWSTREAM_NoError)
 	  return ErrorCode;
 
-	if ((PIMABlock.Type != PIMA_CONTAINER_ResponseBlock) || (PIMABlock.Code != 0x2001))
+	if ((PIMABlock.Type != CPU_TO_LE16(PIMA_CONTAINER_ResponseBlock)) || (PIMABlock.Code != CPU_TO_LE16(0x2001)))
 	  return SI_ERROR_LOGICAL_CMD_FAILED;
 
 	return PIPE_RWSTREAM_NoError;