Added new HOST_STATE_WaitForDeviceRemoval host state machine state for non-blocking disabling of device communications until the device has been removed (for use when an error occurs or communications with the device have completed). Changed over all host mode demos to use the new state.

Added verbose documentation for each of the USB Host state machine states.

Demos/Host/Incomplete/BluetoothHost/BluetoothHost.c

@@ -139,15 +139,12 @@ void Bluetooth_Management_Task(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
 			puts_P(PSTR("Bluetooth Dongle Detected.\r\n"));
 
-			/* Select the control pipe for the request transfer */
-			Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
 			/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 			if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 			{
@@ -158,7 +155,7 @@ void Bluetooth_Management_Task(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -181,17 +178,13 @@ void Bluetooth_Management_Task(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
 			puts_P(PSTR("Bluetooth Dongle Enumerated.\r\n"));
 
 			USB_HostState = HOST_STATE_Ready;
-			break;
-		case HOST_STATE_Ready:
-			/* Do nothing, Bluetooth stack will take care of enumeration */
-			
 			break;
 	}
 }

Demos/Host/Incomplete/BluetoothHost/DeviceDescriptor.c

@@ -34,21 +34,8 @@ uint8_t ProcessDeviceDescriptor(void)
 {
 	USB_Descriptor_Device_t DeviceDescriptor;
 
-	/* Standard request to get the device descriptor */
-	USB_ControlRequest = (USB_Request_Header_t)
-		{
-			bmRequestType: (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
-			bRequest:      REQ_GetDescriptor,
-			wValue:        (DTYPE_Device << 8),
-			wIndex:        0,
-			wLength:       sizeof(USB_Descriptor_Device_t),
-		};
-
-	/* Select the control pipe for the request transfer */
-	Pipe_SelectPipe(PIPE_CONTROLPIPE);
-
 	/* Send the request to retrieve the device descriptor */
-	if (USB_Host_SendControlRequest((void*)&DeviceDescriptor) != HOST_SENDCONTROL_Successful)
+	if (USB_Host_GetDeviceDescriptor(&DeviceDescriptor) != HOST_SENDCONTROL_Successful)
 	  return ControlErrorDuringDeviceRead;
 	  
 	/* Validate returned data - ensure the returned data is a device descriptor */

Demos/Host/Incomplete/PrinterHost/PrinterHost.c

@@ -133,7 +133,7 @@ void USB_Printer_Host(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -147,7 +147,7 @@ void USB_Printer_Host(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -173,7 +173,7 @@ void USB_Printer_Host(void)
 				LEDs_SetAllLEDs(LEDS_LED1);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -182,9 +182,7 @@ void USB_Printer_Host(void)
 			/* Indicate device no longer busy */
 			LEDs_SetAllLEDs(LEDS_LED4);
 
-			/* Wait until USB device disconnected */
+			USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-			while (USB_IsConnected);
-			
 			break;
 	}
 }

Demos/Host/LowLevel/CDCHost/CDCHost.c

@@ -148,7 +148,7 @@ void CDC_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -162,7 +162,7 @@ void CDC_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				

Demos/Host/LowLevel/GenericHIDHost/GenericHIDHost.c

@@ -249,7 +249,7 @@ void HID_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -263,7 +263,7 @@ void HID_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			

Demos/Host/LowLevel/KeyboardHost/KeyboardHost.c

@@ -213,7 +213,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 		
@@ -227,7 +227,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -257,7 +257,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 

Demos/Host/LowLevel/KeyboardHostWithParser/KeyboardHostWithParser.c

@@ -148,7 +148,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -163,7 +163,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -182,7 +182,7 @@ void Keyboard_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;	
 			}
 

Demos/Host/LowLevel/MassStorageHost/MassStorageHost.c

@@ -154,7 +154,7 @@ void MassStorage_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -168,7 +168,7 @@ void MassStorage_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -187,6 +187,8 @@ void MassStorage_Task(void)
 			if ((ErrorCode = MassStore_GetMaxLUN(&MassStore_MaxLUNIndex)) != HOST_SENDCONTROL_Successful)
 			{	
 				ShowDiskReadError(PSTR("Get Max LUN"), false, ErrorCode);
+
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -197,6 +199,8 @@ void MassStorage_Task(void)
 			if ((ErrorCode = MassStore_MassStorageReset()) != HOST_SENDCONTROL_Successful)
 			{
 				ShowDiskReadError(PSTR("Mass Storage Reset"), false, ErrorCode);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -213,6 +217,8 @@ void MassStorage_Task(void)
 			if (((ErrorCode = MassStore_PreventAllowMediumRemoval(0, true)) != 0) || (SCSICommandStatus.Status != Command_Pass))
 			{
 				ShowDiskReadError(PSTR("Prevent/Allow Medium Removal"), (SCSICommandStatus.Status != Command_Pass), ErrorCode);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -221,6 +227,8 @@ void MassStorage_Task(void)
 			if (((ErrorCode = MassStore_Inquiry(0, &InquiryData)) != 0) || (SCSICommandStatus.Status != Command_Pass))
 			{
 				ShowDiskReadError(PSTR("Inquiry"), (SCSICommandStatus.Status != Command_Pass), ErrorCode);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -237,6 +245,8 @@ void MassStorage_Task(void)
 				if ((ErrorCode = MassStore_TestUnitReady(0)) != 0)
 				{
 					ShowDiskReadError(PSTR("Test Unit Ready"), false, ErrorCode);
+
+					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 					break;
 				}
 			}
@@ -255,6 +265,8 @@ void MassStorage_Task(void)
 			if (((ErrorCode = MassStore_ReadCapacity(0, &DiskCapacity)) != 0) || (SCSICommandStatus.Status != Command_Pass))
 			{
 				ShowDiskReadError(PSTR("Read Capacity"), (SCSICommandStatus.Status != Command_Pass), ErrorCode);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -269,6 +281,8 @@ void MassStorage_Task(void)
 			    (SCSICommandStatus.Status != Command_Pass))
 			{
 				ShowDiskReadError(PSTR("Read Device Block"), (SCSICommandStatus.Status != Command_Pass), ErrorCode);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -319,6 +333,8 @@ void MassStorage_Task(void)
 				    (SCSICommandStatus.Status != Command_Pass))
 				{
 					ShowDiskReadError(PSTR("Read Device Block"), (SCSICommandStatus.Status != Command_Pass), ErrorCode);
+					
+					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 					break;
 				}
 
@@ -339,8 +355,7 @@ void MassStorage_Task(void)
 			LEDs_SetAllLEDs(LEDMASK_USB_READY);
 			
 			/* Wait until USB device disconnected */
-			while (USB_IsConnected);
+			USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-			
 			break;
 	}
 }
@@ -372,7 +387,4 @@ void ShowDiskReadError(char* CommandString, bool FailedAtSCSILayer, uint8_t Erro
 
 	/* Indicate device error via the status LEDs */
 	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-
-	/* Wait until USB device disconnected */
-	while (USB_IsConnected);
 }

Demos/Host/LowLevel/MouseHost/MouseHost.c

@@ -209,7 +209,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -223,7 +223,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -253,7 +253,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 

Demos/Host/LowLevel/MouseHostWithParser/MouseHostWithParser.c

@@ -149,7 +149,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 		
@@ -163,7 +163,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -182,7 +182,7 @@ void Mouse_HID_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;			
 			}
 

Demos/Host/LowLevel/StillImageHost/StillImageHost.c

@@ -149,7 +149,7 @@ void StillImage_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -162,7 +162,7 @@ void StillImage_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 				
@@ -195,6 +195,8 @@ void StillImage_Task(void)
 			if ((ErrorCode = SImage_RecieveBlockHeader()) != PIPE_RWSTREAM_NoError)
 			{
 				ShowCommandError(ErrorCode, false);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -246,6 +248,8 @@ void StillImage_Task(void)
 			if ((ErrorCode = SImage_RecieveBlockHeader()) != PIPE_RWSTREAM_NoError)
 			{
 				ShowCommandError(ErrorCode, false);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -253,6 +257,8 @@ void StillImage_Task(void)
 			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
 			{
 				ShowCommandError(PIMA_ReceivedBlock.Code, true);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -274,6 +280,8 @@ void StillImage_Task(void)
 			if ((ErrorCode = SImage_RecieveBlockHeader()) != PIPE_RWSTREAM_NoError)
 			{
 				ShowCommandError(ErrorCode, false);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 			
@@ -281,6 +289,8 @@ void StillImage_Task(void)
 			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
 			{
 				ShowCommandError(PIMA_ReceivedBlock.Code, true);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -302,6 +312,8 @@ void StillImage_Task(void)
 			if ((ErrorCode = SImage_RecieveBlockHeader()) != PIPE_RWSTREAM_NoError)
 			{
 				ShowCommandError(ErrorCode, false);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -309,6 +321,8 @@ void StillImage_Task(void)
 			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
 			{
 				ShowCommandError(PIMA_ReceivedBlock.Code, true);
+				
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -363,7 +377,4 @@ void ShowCommandError(uint8_t ErrorCode, bool ResponseCodeError)
 			
 	/* Indicate error via status LEDs */
 	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-				
-	/* Wait until USB device disconnected */
-	while (USB_IsConnected);
 }

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

@@ -203,12 +203,12 @@ void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo)
 		case HOST_STATE_Addressed:
 			if ((ErrorCode = CDC_Host_ProcessConfigDescriptor(CDCInterfaceInfo)) != CDC_ENUMERROR_NoError)
 			{
-				USB_HostState = HOST_STATE_Unattached;
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 			}
 
 			if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 			{
-				USB_HostState = HOST_STATE_Unattached;
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 			}
 				
 			USB_HostState = HOST_STATE_Configured;

LUFA/Drivers/USB/LowLevel/Host.c

@@ -66,6 +66,7 @@ void USB_Host_ProcessNextHostState(void)
 			USB_HostState = HOST_STATE_Attached_WaitForDeviceSettle;
 			break;
 		case HOST_STATE_Attached_WaitForDeviceSettle:
+			#if HOST_DEVICE_SETTLE_DELAY_MS > 0
 			_delay_ms(1);
 
 			if (!(WaitMSRemaining--))
@@ -78,6 +79,9 @@ void USB_Host_ProcessNextHostState(void)
 				
 				USB_HostState = HOST_STATE_Attached_WaitForConnect;
 			}
+			#else
+			USB_HostState = HOST_STATE_Attached_WaitForConnect;			
+			#endif
 			
 			break;
 		case HOST_STATE_Attached_WaitForConnect:		

LUFA/Drivers/USB/LowLevel/Host.h

@@ -221,20 +221,103 @@
 			 */
 			enum USB_Host_States_t
 			{
-				HOST_STATE_WaitForDevice                = 0,  /**< Internally implemented by the library. */
+				HOST_STATE_WaitForDeviceRemoval         = 0,  /**< Internally implemented by the library. This state can be
-				HOST_STATE_Unattached                   = 1,  /**< Internally implemented by the library. */
+				                                               *   used by the library to wait until the attached device is
-				HOST_STATE_Attached                     = 2,  /**< Internally implemented by the library. */
+				                                               *   removed by the user - useful for when an error occurs or
-				HOST_STATE_Attached_WaitForDeviceSettle = 3,  /**< Internally implemented by the library. */
+				                                               *   further communication with the device is not needed. This
-				HOST_STATE_Attached_WaitForConnect      = 4,  /**< Internally implemented by the library. */
+				                                               *   allows for other code to run while the state machine is
-				HOST_STATE_Attached_DoReset             = 5,  /**< Internally implemented by the library. */
+				                                               *   effectively disabled.
-				HOST_STATE_Powered                      = 6,  /**< Internally implemented by the library. */
+				                                               */
-				HOST_STATE_Default                      = 7,  /**< Internally implemented by the library. */
+				HOST_STATE_WaitForDevice                = 1,  /**< Internally implemented by the library. This state indicates
-				HOST_STATE_Default_PostReset            = 8,  /**< Internally implemented by the library. */
+				                                               *   that the stack is waiting for an interval to elapse before
-				HOST_STATE_Default_PostAddressSet       = 9,  /**< Internally implemented by the library. */
+				                                               *   continuing with the next step of the device enumeration
-				HOST_STATE_Addressed                    = 10, /**< May be implemented by the user project. */
+				                                               *   process.
-				HOST_STATE_Configured                   = 11, /**< May be implemented by the user project. */
+				                                               *
-				HOST_STATE_Ready                        = 12, /**< May be implemented by the user project. */
+				                                               *   \note Do not manually change to this state in the user code.
-				HOST_STATE_Suspended                    = 13, /**< May be implemented by the user project. */
+				                                               */
+				HOST_STATE_Unattached                   = 2,  /**< Internally implemented by the library. This state indicates
+				                                               *   that the host state machine is waiting for a device to be
+				                                               *   attached so that it can start the enumeration process.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Attached                     = 3,  /**< Internally implemented by the library. This state indicates
+				                                               *   that a device has been attached, and the library's internals
+				                                               *   are being configured to begin the enumeration process.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Attached_WaitForDeviceSettle = 4,  /**< Internally implemented by the library. This state indicates
+				                                               *   that the stack is waiting for the initial settling period to
+				                                               *   elapse before beginning the enumeration process.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Attached_WaitForConnect      = 5,  /**< Internally implemented by the library. This state indicates
+				                                               *   that the stack is waiting for a connection event from the USB
+				                                               *   controller to indicate a valid USB device has been attached to
+				                                               *   the bus and is ready to be enumerated.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Attached_DoReset             = 6,  /**< Internally implemented by the library. This state indicates
+				                                               *   that a valid USB device has been attached, and that it is
+				                                               *   will now be reset to ensure it is ready for enumeration.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Powered                      = 7,  /**< Internally implemented by the library. This state indicates
+				                                               *   that the attached device is currently powered and reset, and
+				                                               *   that the control pipe is now being configured by the stack.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Default                      = 8,  /**< Internally implemented by the library. This state indicates
+				                                               *   that the stack is currently retrieving the control endpoint's
+				                                               *   size from the device, so that the control pipe can be altered
+				                                               *   to match.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Default_PostReset            = 9,  /**< Internally implemented by the library. This state indicates that
+				                                               *   the control pipe is being reconfigured to match the retrieved
+				                                               *   control endpoint size from the device, and the device's USB bus
+				                                               *   address is being set.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Default_PostAddressSet       = 10, /**< Internally implemented by the library. This state indicates that
+				                                               *   the device's address has now been set, and the stack is has now
+				                                               *   completed the device enumeration process. This state causes the
+				                                               *   stack to change the current USB device address to that set for
+				                                               *   the connected device, before progressing to the user-implemented
+				                                               *   HOST_STATE_Addressed state for further communications.
+				                                               *   
+				                                               *   \note Do not manually change to this state in the user code.
+				                                               */
+				HOST_STATE_Addressed                    = 11, /**< May be implemented by the user project. This state should
+				                                               *   set the device configuration before progressing to the
+				                                               *   HOST_STATE_Configured state. Other processing (such as the
+				                                               *   retrieval and processing of the device descriptor) should also
+				                                               *   be placed in this state.
+				                                               */
+				HOST_STATE_Configured                   = 12, /**< May be implemented by the user project. This state should
+				                                               *   implement any extra device configuration (such as the setting of
+				                                               *   class-specific parameters) before normal communication is begun
+				                                               *   in the HOST_STATE_Ready state.
+				                                               */
+				HOST_STATE_Ready                        = 13, /**< May be implemented by the user project. This state should
+				                                               *   contain the main communications with the attached device. From this
+				                                               *   this state the host state machine should be changed to either
+				                                               *   HOST_STATE_Suspended (after the bus is manually suspended using the
+				                                               *   USB_Host_SuspendBus() macro) or HOST_STATE_WaitForDeviceRemoval as
+				                                               *   needed.
+				                                               */
+				HOST_STATE_Suspended                    = 15, /**< May be implemented by the user project. This state should be maintained
+				                                               *   while the bus is suspended, and changed to either the HOST_STATE_Ready
+				                                               *   (after resuming the bus with the USB_Host_ResumeBus() macro) or the
+				                                               *   HOST_STATE_WaitForDeviceRemoval states as needed.
+				                                               */
 			};
 			
 			/** Enum for the error codes for the \ref EVENT_USB_HostError() event.

LUFA/ManPages/ChangeLog.txt

@@ -21,6 +21,8 @@
   *    added NO_INTERNAL_SERIAL compile time option to turn off new serial number reading code
   *  - Added new DATAFLASH_CHIP_MASK() macro to the Dataflash driver, which returns the Dataflash select mask for the given chip index
   *  - Updated MassStorage device block write routines to use ping-pong Dataflash buffering to increase throughput by around 30%
+  *  - Added new HOST_STATE_WaitForDeviceRemoval host state machine state for non-blocking disabling of device communications until the
+  *    device has been removed (for use when an error occurs or communications with the device have completed)
   *  
   *  <b>Changed:</b>
   *  - Deprecated psuedo-scheduler and removed dynamic memory allocator from the library (first no longer needed and second unused)

LUFA/ManPages/CompileTimeTokens.txt

@@ -120,8 +120,8 @@
  *  <b>HOST_DEVICE_SETTLE_DELAY_MS</b> - ( \ref Group_Host ) \n
  *  Some devices require a delay of up to 5 seconds after they are connected to VBUS before the enumeration process can be started, or
  *  they will fail to enumerate correctly. By placing a delay before the enumeration process, it can be ensured that the bus has settled
- *  back to a known idle state before communications occur with the device. This token may be defined to a non-zero 16-bit value to set
+ *  back to a known idle state before communications occur with the device. This token may be defined to a 16-bit value to set the device
- *  the device settle period, specified in milliseconds. If not defined, the default value specified in Host.h is used instead.
+ *  settle period, specified in milliseconds. If not defined, the default value specified in Host.h is used instead.
  *
  *  <b>USE_STATIC_OPTIONS</b> - ( \ref Group_USBManagement ) \n
  *  By default, the USB_Init() function accepts dynamic options at runtime to alter the library behaviour, including whether the USB pad

LUFA/ManPages/FutureChanges.txt

@@ -19,9 +19,9 @@
   *     -# Re-enable Host mode Class driver builds after completion
   *     -# Update Host mode Class Driver demo .txt files
   *  - Add standardized descriptor names to device and host class driver structures
-  *  - Remove USE_NONSTANDARD_DESCRIPTOR_NAMES, make all typedefs unions to allow either naming scheme to be used
   *  - Add in INTERRUPT_CONTROL_PIPE to use HSOFI to trigger calls to the host state machine
   *  - Make Suspend host state suspend USB bus frames
+  *  - Split StillImageHost demo into lib directory
   *  - Add in Stream functions for PROGMEM, EEPROM -- move to templated system
   *  - Debug mode for pipe/endpoint calls
   *  - Test and document new FAST_STREAM_TRANSFERS compile time option

Projects/MissileLauncher/MissileLauncher.c

@@ -318,7 +318,7 @@ void HID_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}
 
@@ -329,7 +329,7 @@ void HID_Host_Task(void)
 				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 				
 				/* Wait until USB device disconnected */
-				while (USB_IsConnected);
+				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 				break;
 			}