Fix MassStorageKeyboard demo USE_INTERNAL_SERIAL check being performed before the required library headers were included, causing a compilation error.

Added notes to the class driver functions indicating which functions require what Device/Host state machine states to function.

Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c

@@ -29,10 +29,6 @@
   this software.
 */
 
-#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
-	#warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
-#endif
-
 /** \file
  *
  *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special 
@@ -42,6 +38,18 @@
 
 #include "Descriptors.h"
 
+/* On some devices, there is a factory set internal serial number which can be automatically sent to the host as
+ * the device's serial number when the Device Descriptor's .SerialNumStrIndex entry is set to USE_INTERNAL_SERIAL.
+ * This allows the host to track a device across insertions on different ports, allowing them to retain allocated
+ * resources like COM port numbers and drivers. On demos using this feature, give a warning on unsupported devices
+ * so that the user can supply their own serial number descriptor instead or remove the USE_INTERNAL_SERIAL value
+ * from the Device Descriptor (forcing the host to generate a serial number for each device from the VID, PID and
+ * port location).
+ */
+#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
+	#warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
+#endif
+
 /** HID class report descriptor. This is a special descriptor constructed with values from the
  *  USBIF HID class specification to describe the reports and capabilities of the HID device. This
  *  descriptor is parsed by the host and its contents used to determine what data (and in what encoding)

Demos/Device/ClassDriver/MassStorageKeyboard/makefile

@@ -123,8 +123,7 @@ LUFA_PATH = ../../../..
 
 
 # LUFA library compile-time options
-LUFA_OPTS  = -D USE_NONSTANDARD_DESCRIPTOR_NAMES
+LUFA_OPTS  = -D USB_DEVICE_ONLY
-LUFA_OPTS += -D USB_DEVICE_ONLY
 LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
 LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
 LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
@@ -132,6 +131,7 @@ LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENAB
 LUFA_OPTS += -D INTERRUPT_CONTROL_ENDPOINT
 
 
+
 # List C source files here. (C dependencies are automatically generated.)
 SRC = $(TARGET).c                                                 \
 	  Descriptors.c                                               \

LUFA/Drivers/USB/Class/Device/Audio.h

@@ -123,6 +123,9 @@
 			/** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming
 			 *  OUT endpoint ready for reading.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state
 			 *
 			 *  \return Boolean true if the given Audio interface has a sample to be read, false otherwise
@@ -132,6 +135,9 @@
 			/** Determines if the given audio interface is ready to accept the next sample to be written to it, and selects
 			 *  the streaming IN endpoint ready for writing.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state
 			 *
 			 *  \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise

LUFA/Drivers/USB/Class/Device/CDC.h

@@ -157,6 +157,9 @@
 			/** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the
 			 *  string is discarded.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 *  \param[in] Data  Pointer to the string to send to the host
 			 *  \param[in] Length  Size in bytes of the string to send to the host
@@ -169,6 +172,9 @@
 			/** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the
 			 *  byte is discarded.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 *  \param[in] Data  Byte of data to send to the host
 			 *
@@ -177,6 +183,9 @@
 			uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
 			
 			/** Determines the number of bytes received by the CDC interface from the host, waiting to be read.
+			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
 			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 *
@@ -188,6 +197,9 @@
 			 *  returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data
 			 *  underflow occurs.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 *
 			 *  \return Next received byte from the host, or 0 if no data received
@@ -195,6 +207,9 @@
 			uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 			
 			/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
+			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
 			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 *
@@ -207,6 +222,9 @@
 			 *  until they are cleared via a second notification. This should be called each time the CDC class driver's 
 			 *  ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.
 			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state
 			 */
 			void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);

LUFA/Drivers/USB/Class/Device/HID.c

@@ -186,10 +186,4 @@ void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 	}
 }
 
-void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo)
-{
-	if (HIDInterfaceInfo->State.IdleMSRemaining)
-	  HIDInterfaceInfo->State.IdleMSRemaining--;
-}
-
 #endif

LUFA/Drivers/USB/Class/Device/HID.h

@@ -138,7 +138,12 @@
 			 *
 			 *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class configuration and state
 			 */
-			void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+			static inline void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo);
+			static inline void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo)
+			{
+				if (HIDInterfaceInfo->State.IdleMSRemaining)
+				  HIDInterfaceInfo->State.IdleMSRemaining--;
+			}
 			
 			/** HID class driver callback for the user creation of a HID IN report. This callback may fire in response to either
 			 *  HID class control requests from the host, or by the normal HID endpoint polling procedure. Inside this callback the

LUFA/Drivers/USB/Class/Device/MIDI.h

@@ -112,6 +112,9 @@
 			void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Sends a MIDI event packet to the host. If no host is connected, the event packet is discarded.
+			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
 			 *
 			 *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state
 			 *  \param[in] Event  Pointer to a populated USB_MIDI_EventPacket_t structure containing the MIDI event to send
@@ -122,6 +125,9 @@
 			                                    MIDI_EventPacket_t* const Event) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
 
 			/** Receives a MIDI event packet from the host.
+			 *
+			 *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
+			 *        the call will fail.
 			 *
 			 *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state
 			 *  \param[out] Event  Pointer to a USB_MIDI_EventPacket_t structure where the received MIDI event is to be placed

LUFA/Drivers/USB/Class/Host/CDC.h

@@ -177,6 +177,9 @@
 			/** Sends a given string to the attached USB device, if connected. If a device is not connected when the function is called, the
 			 *  string is discarded.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class host configuration and state
 			 *  \param[in] Data  Pointer to the string to send to the device
 			 *  \param[in] Length  Size in bytes of the string to send to the device
@@ -189,6 +192,9 @@
 			/** Sends a given byte to the attached USB device, if connected. If a host is not connected when the function is called, the
 			 *  byte is discarded.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class host configuration and state
 			 *  \param[in] Data  Byte of data to send to the device
 			 *
@@ -197,6 +203,9 @@
 			uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Determines the number of bytes received by the CDC interface from the device, waiting to be read.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class host configuration and state
 			 *
@@ -208,6 +217,9 @@
 			 *  returns 0. The \ref CDC_Host_BytesReceived() function should be queried before data is received to ensure that no data
 			 *  underflow occurs.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class host configuration and state
 			 *
 			 *  \return Next received byte from the device, or 0 if no data received
@@ -215,6 +227,9 @@
 			uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 			
 			/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class host configuration and state
 			 *

LUFA/Drivers/USB/Class/Host/HID.c

@@ -220,6 +220,9 @@ uint8_t HID_Host_SendReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo
                                 void* Buffer, const uint16_t ReportSize)
 {
 #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
+	if ((USB_HostState != HOST_STATE_Configured) || !(HIDInterfaceInfo->State.IsActive))
+	  return false;
+
 	if (HIDInterfaceInfo->State.DeviceUsesOUTPipe)
 	{
 		uint8_t ErrorCode;

LUFA/Drivers/USB/Class/Host/HID.h

@@ -158,6 +158,9 @@
 
 
 			/** Receives a HID IN report from the attached HID device, when a report has been received on the HID IN Data pipe.
+			 *  
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \note The destination buffer should be large enough to accommodate the largest report that the attached device
 			 *        can generate.
@@ -172,6 +175,9 @@
 
 			#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 			/** Receives a HID IN report from the attached device, by the report ID.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
 			 *
@@ -188,6 +194,9 @@
 			/** Sends an OUT report to the currently attached HID device, using the device's OUT pipe if available or the device's
 			 *  Control pipe if not.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, the ReportID parameter is removed
 			 *        from the parameter list of this function.
 			 *
@@ -211,6 +220,9 @@
 			#endif
 
 			/** Determines if a HID IN report has been received from the attached device on the data IN pipe.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 			 *

LUFA/Drivers/USB/Class/Host/MIDI.h

@@ -120,6 +120,9 @@
 			                                 void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
 
 			/** Sends a MIDI event packet to the device. If no device is connected, the event packet is discarded.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state
 			 *  \param[in] Event  Pointer to a populated USB_MIDI_EventPacket_t structure containing the MIDI event to send
@@ -130,6 +133,9 @@
 			                                  MIDI_EventPacket_t* const Event) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
 
 			/** Receives a MIDI event packet from the device.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state
 			 *  \param[out] Event  Pointer to a USB_MIDI_EventPacket_t structure where the received MIDI event is to be placed

LUFA/Drivers/USB/Class/Host/MassStorage.h

@@ -164,6 +164,9 @@
 			/** Retrieves the Mass Storage device's inquiry data for the specified LUN, indicating the device characteristics and
 			 *  properties.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to
 			 *  \param[out] InquiryData  Location where the read inquiry data should be stored
@@ -185,6 +188,9 @@
 			                              ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Retrieves the total capacity of the attached USB Mass Storage device, in blocks, and block size.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to
@@ -199,6 +205,9 @@
 			/** Retrieves the device sense data, indicating the current device state and error codes for the previously
 			 *  issued command.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to
 			 *  \param[out] SenseData  Pointer to the location where the sense information should be stored
@@ -212,6 +221,9 @@
 			/** Issues a PREVENT MEDIUM REMOVAL command, to logically (or, depending on the type of device, physically) lock
 			 *  the device from removal so that blocks of data on the medium can be read or altered.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to
 			 *  \param[in] PreventRemoval  Boolean true if the device should be locked from removal, false otherwise
@@ -222,6 +234,9 @@
 			                                          const bool PreventRemoval) ATTR_NON_NULL_PTR_ARG(1);
 			
 			/** Reads blocks of data from the attached Mass Storage device's medium.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to
@@ -237,6 +252,9 @@
 			                                 void* BlockBuffer) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(6);
 		
 			/** Writes blocks of data to the attached Mass Storage device's medium.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] MSInterfaceInfo  Pointer to a structure containing a MS Class host configuration and state
 			 *  \param[in] LUNIndex  LUN index within the device the command is being issued to

LUFA/Drivers/USB/Class/Host/Printer.h

@@ -156,6 +156,9 @@
 			 *  printer is able to understand - for example, PCL data. Not all printers accept all printer languages; see
 			 *  \ref PRNT_Host_GetDeviceID() for details on determining acceptable languages for an attached printer.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] PRNTInterfaceInfo  Pointer to a structure containing a Printer Class host configuration and state
 			 *  \param[in] PrinterCommands  Pointer to a buffer containing the raw command stream to send to the printer
 			 *  \param[in] CommandSize  Size in bytes of the command stream to be sent

LUFA/Drivers/USB/Class/Host/RNDIS.h

@@ -189,6 +189,9 @@
 			                                      uint16_t MaxLength) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
 
 			/** Determines if a packet is currently waiting for the host to read in and process.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] RNDISInterfaceInfo  Pointer to a structure containing an RNDIS Class host configuration and state
 			 *
@@ -200,6 +203,9 @@
 			/** Retrieves the next pending packet from the device, discarding the remainder of the RNDIS packet header to leave
 			 *  only the packet contents for processing by the host in the nominated buffer.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] RNDISInterfaceInfo  Pointer to a structure containing an RNDIS Class host configuration and state
 			 *  \param[out] Buffer  Pointer to a buffer where the packer data is to be written to
 			 *  \param[out] PacketLength  Pointer to where the length in bytes of the read packet is to be stored
@@ -210,6 +216,9 @@
 			                              ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2) ATTR_NON_NULL_PTR_ARG(3);
 
 			/** Sends the given packet to the attached RNDIS device, after adding a RNDIS packet message header.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] RNDISInterfaceInfo  Pointer to a structure containing an RNDIS Class host configuration and state
 			 *  \param[in] Buffer  Pointer to a buffer where the packer data is to be read from

LUFA/Drivers/USB/Class/Host/StillImage.h

@@ -135,6 +135,9 @@
 			/** Opens a new PIMA session with the attached device. This should be used before any session-orientated PIMA commands
 			 *  are issued to the device. Only one session can be open at the one time.
 			 *	
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *
 			 *  \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum, or \ref SI_ERROR_LOGICAL_CMD_FAILED if the device
@@ -145,6 +148,9 @@
 			/** Closes an already opened PIMA session with the attached device. This should be used after all session-orientated
 			 *  PIMA commands have been issued to the device.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *
 			 *  \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum, or \ref SI_ERROR_LOGICAL_CMD_FAILED if the device
@@ -155,6 +161,9 @@
 			/** Sends a raw PIMA block header to the device, filling out the transaction ID automatically. This can be used to send
 			 *  arbitrary PIMA blocks to the device with or without parameters.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[in] PIMAHeader  Pointer to a PIMA container structure that is to be sent
 			 *
@@ -165,6 +174,9 @@
 			/** Receives a raw PIMA block header to the device. This can be used to receive arbitrary PIMA blocks from the device with
 			 *  or without parameters.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[out] PIMAHeader  Pointer to a PIMA container structure where the received block is to be stored
 			 *
@@ -173,6 +185,9 @@
 			uint8_t SImage_Host_ReceiveBlockHeader(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo, SI_PIMA_Container_t* const PIMAHeader);
 
 			/** Sends a given PIMA command to the attached device, filling out the PIMA command header's Transaction ID automatically.
+			 *	
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[in] Operation  PIMA operation code to issue to the device
@@ -188,6 +203,9 @@
 			/** Receives and checks a response block from the attached PIMA device, once a command has been issued and all data
 			 *  associated with the command has been transferred.
 			 *	
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *
 			 *  \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum, or \ref SI_ERROR_LOGICAL_CMD_FAILED if the device
@@ -196,6 +214,9 @@
 			uint8_t SImage_Host_ReceiveResponse(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Indicates if the device has issued a PIMA event block to the host via the asynchronous events pipe.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *
@@ -204,6 +225,9 @@
 			bool SImage_Host_IsEventReceived(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Receives an asynchronous event block from the device via the asynchronous events pipe.
+			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
 			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[out] PIMAHeader  Pointer to a PIMA container structure where the event should be stored
@@ -218,6 +242,9 @@
 			/** Sends arbitrary data to the attached device, for use in the data phase of PIMA commands which require data
 			 *  transfer beyond the regular PIMA command block parameters.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[in] Buffer  Pointer to a buffer where the data to send has been stored
 			 *  \param[in] Bytes  Length in bytes of the data in the buffer to send to the attached device
@@ -230,6 +257,9 @@
 			/** Receives arbitrary data from the attached device, for use in the data phase of PIMA commands which require data
 			 *  transfer beyond the regular PIMA command block parameters.
 			 *
+			 *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
+			 *        call will fail.
+			 *
 			 *  \param[in,out] SIInterfaceInfo  Pointer to a structure containing a Still Image Class host configuration and state
 			 *  \param[out] Buffer  Pointer to a buffer where the received data is to be stored
 			 *  \param[in] Bytes  Length in bytes of the data to read

LUFA/ManPages/LUFAPoweredProjects.txt

@@ -18,6 +18,7 @@
  *  The following is a list of known AVR USB development boards, which recommend using LUFA for the USB stack. Some of these
  *  are open design, and all are available for purchase as completed development boards suitable for project development.
  *
+ *  - AT90USB162 Breadboard PCB (Russian): http://microsin.ru/content/view/685/44/
  *  - Benito #7, a no-frills USB board: http://www.dorkbotpdx.org/wiki/benito
  *  - Bumble-B, yet another AT90USB162 development board: http://fletchtronics.net/bumble-b
  *  - Micropendous, an open design/source set of AVR USB development boards: http://micropendous.org/
@@ -64,4 +65,8 @@
  *  - Lightweight CC110x USB dongle for 868MHz Protocols: http://busware.de/tiki-index.php?page=CUL
  *  - Mobo 4.3, a USB controlled all band (160-10m) HF SDR transceiver: http://sites.google.com/site/lofturj/mobo4_3
  *  - SEGA Megadrive/Super Nintendo Cartridge Reader: http://www.snega2usb.com
+ *
+ *  \section Sec_LUFAPublications Publications Mentioning LUFA
+ *  - Elektor Magazine, "My First AVR-USB" by Antoine Authier (feature), January 2010 Issue
+ *  - Elektor Magazine, "USB is Cool/Sucks" by Jerry Jacobs and Chris Vossen (minor mention), January 2010 Issue
  */

Projects/Incomplete/StandaloneProgrammer/DiskHost.c

@@ -79,8 +79,6 @@ void DiskHost_USBTask(void)
 			return;
 		}
 		
-		USB_HostState = HOST_STATE_Configured;
-		
 		uint8_t MaxLUNIndex;
 		if (MS_Host_GetMaxLUN(&DiskHost_MS_Interface, &MaxLUNIndex))
 		{
@@ -96,6 +94,10 @@ void DiskHost_USBTask(void)
 			return;
 		}
 		
+		USB_HostState = HOST_STATE_Configured;
+		
+		/* Note: For the RequestSense call to work, the host state machine must be in the 
+		 *       Configured state, or the call will be aborted */
 		SCSI_Request_Sense_Response_t SenseData;
 		if (MS_Host_RequestSense(&DiskHost_MS_Interface, 0, &SenseData) != 0)
 		{