Fixed logic hole breaking USB operations on a USB controller with only one supported USB mode and no USB_DEVICE_ONLY or USB_HOST_ONLY configuration token set.

LUFA/DoxygenPages/ChangeLog.txt

@@ -25,6 +25,8 @@
   *  - Core:
   *   - Fixed inverted LEDs_GetLEDs() function implementation for the Benito, Minimus and Arduino UNO boards
   *   - Fixed missing Win-32bit compatibility sections in the LUFA INF driver files (thanks to Christan Beharrell)
+  *   - Fixed logic hole breaking USB operations on a USB controller with only one supported USB mode and no USB_DEVICE_ONLY or USB_HOST_ONLY
+  *     configuration token set
   *  - Library Applications:
   *   - Fixed broken RESET_TOGGLES_LIBUSB_COMPAT compile time option in the AVRISP-MKII project
   *   - Fixed incompatibility in the CDC class bootloader on some systems (thanks to Sylvain Munaut)

LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.c

@@ -35,7 +35,7 @@
 #define  __INCLUDE_FROM_USB_CONTROLLER_C
 #include "../USBController.h"
 
-#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
+#if defined(USB_CAN_BE_BOTH)
 volatile uint8_t USB_CurrentMode = USB_MODE_None;
 #endif
 

LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h

@@ -211,8 +211,10 @@
 			 *  Calling this function when the USB interface is already initialized will cause a complete USB
 			 *  interface reset and re-enumeration.
 			 *
-			 *  \param[in] Mode     This is a mask indicating what mode the USB interface is to be initialized to, a value
+			 *  \param[in] Mode     Mask indicating what mode the USB interface is to be initialized to, a value
 			 *                      from the \ref USB_Modes_t enum.
+			 *                      \note This parameter does not exist on devices with only one supported USB
+			 *                            mode (device or host).
 			 *
 			 *  \param[in] Options  Mask indicating the options which should be used when initializing the USB
 			 *                      interface to control the USB interface's behavior. This should be comprised of
@@ -267,7 +269,7 @@
 			void USB_ResetInterface(void);
 
 		/* Global Variables: */
-			#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
+			#if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__)
 				/** Indicates the mode that the USB interface is currently initialized to, a value from the
 				 *  \ref USB_Modes_t enum.
 				 *
@@ -282,9 +284,9 @@
 				 *        USB interface is not initialized.
 				 */
 				extern volatile uint8_t USB_CurrentMode;
-			#elif defined(USB_HOST_ONLY)
+			#elif defined(USB_CAN_BE_HOST)
 				#define USB_CurrentMode USB_MODE_Host
-			#elif defined(USB_DEVICE_ONLY)
+			#elif defined(USB_CAN_BE_DEVICE)
 				#define USB_CurrentMode USB_MODE_Device
 			#endif
 

LUFA/Drivers/USB/Core/Events.h

@@ -156,6 +156,12 @@
 			 *  This event is time-critical; exceeding OS-specific delays within this event handler (typically of around
 			 *  1 second) when a transaction is waiting to be processed by the device will prevent break communications
 			 *  and cause the host to reset the USB bus.
+			 *
+			 *  \note This event only exists on microcontrollers that supports USB host mode.
+			 *        \n\n
+			 *
+			 *  \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
+			 *        \ref Group_USBManagement documentation).
 			 */
 			void EVENT_USB_Host_DeviceEnumerationComplete(void);
 

LUFA/Drivers/USB/Core/UC3/USBController_UC3.c

@@ -35,7 +35,7 @@
 #define  __INCLUDE_FROM_USB_CONTROLLER_C
 #include "../USBController.h"
 
-#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
+#if defined(USB_CAN_BE_BOTH)
 volatile uint8_t USB_CurrentMode = USB_MODE_None;
 #endif
 

LUFA/Drivers/USB/Core/UC3/USBController_UC3.h

@@ -178,8 +178,10 @@
 			 *  Calling this function when the USB interface is already initialized will cause a complete USB
 			 *  interface reset and re-enumeration.
 			 *
-			 *  \param[in] Mode     This is a mask indicating what mode the USB interface is to be initialized to, a value
+			 *  \param[in] Mode     Mask indicating what mode the USB interface is to be initialized to, a value
 			 *                      from the \ref USB_Modes_t enum.
+			 *                      \note This parameter does not exist on devices with only one supported USB
+			 *                            mode (device or host).
 			 *
 			 *  \param[in] Options  Mask indicating the options which should be used when initializing the USB
 			 *                      interface to control the USB interface's behavior. This should be comprised of
@@ -230,7 +232,7 @@
 			void USB_ResetInterface(void);
 
 		/* Global Variables: */
-			#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
+			#if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__)
 				/** Indicates the mode that the USB interface is currently initialized to, a value from the
 				 *  \ref USB_Modes_t enum.
 				 *
@@ -245,9 +247,9 @@
 				 *        USB interface is not initialized.
 				 */
 				extern volatile uint8_t USB_CurrentMode;
-			#elif defined(USB_HOST_ONLY)
+			#elif defined(USB_CAN_BE_HOST)
 				#define USB_CurrentMode USB_MODE_Host
-			#elif defined(USB_DEVICE_ONLY)
+			#elif defined(USB_CAN_BE_DEVICE)
 				#define USB_CurrentMode USB_MODE_Device
 			#endif
 

LUFA/Drivers/USB/Core/USBMode.h

@@ -244,34 +244,28 @@
 				#define USB_CAN_BE_DEVICE
 			#endif
 
-			#if (defined(USB_CAN_BE_DEVICE) && defined(USB_CAN_BE_HOST))
+			#if (defined(USB_HOST_ONLY) && defined(USB_DEVICE_ONLY))
-				#define USB_CAN_BE_BOTH
+				#error USB_HOST_ONLY and USB_DEVICE_ONLY are mutually exclusive.
-			#endif
+			#elif defined(USB_HOST_ONLY)
-
-			#if defined(USB_HOST_ONLY)
 				#if !defined(USB_CAN_BE_HOST)
 					#error USB_HOST_ONLY is not available for the currently selected microcontroller model.
 				#else
 					#undef USB_CAN_BE_DEVICE
-					#undef USB_CAN_BE_BOTH
 				#endif
-			#endif
+			#elif defined(USB_DEVICE_ONLY)
-
-			#if defined(USB_DEVICE_ONLY)
 				#if !defined(USB_CAN_BE_DEVICE)
 					#error USB_DEVICE_ONLY is not available for the currently selected microcontroller model.
 				#else
 					#undef USB_CAN_BE_HOST
-					#undef USB_CAN_BE_BOTH
 				#endif
 			#endif
 
-			#if (defined(USB_HOST_ONLY) && defined(USB_DEVICE_ONLY))
+			#if (defined(USB_CAN_BE_DEVICE) && defined(USB_CAN_BE_HOST))
-				#error USB_HOST_ONLY and USB_DEVICE_ONLY are mutually exclusive.
+				#define USB_CAN_BE_BOTH
 			#endif
 
 			#if (!defined(USB_CAN_BE_DEVICE) && !defined(USB_CAN_BE_HOST))
-				#error The currently selected device or architecture is not supported under the USB component of the library.
+				#error The currently selected device, USB mode or architecture is not supported.
 			#endif
 	#endif
 

LUFA/Drivers/USB/Core/USBTask.c

@@ -45,17 +45,15 @@ volatile uint8_t     USB_DeviceState;
 
 void USB_USBTask(void)
 {
-	#if defined(USB_HOST_ONLY)
+	#if defined(USB_CAN_BE_BOTH)
-		USB_HostTask();
-	#elif defined(USB_DEVICE_ONLY)
-		USB_DeviceTask();
-	#else
 		if (USB_CurrentMode == USB_MODE_Device)
 		  USB_DeviceTask();
-		#if defined(USB_CAN_BE_HOST)
 		else if (USB_CurrentMode == USB_MODE_Host)
 		  USB_HostTask();
-		#endif
+	#elif defined(USB_CAN_BE_HOST)
+		USB_HostTask();
+	#elif defined(USB_CAN_BE_DEVICE)
+		USB_DeviceTask();
 	#endif
 }
 

LUFA/Drivers/USB/Core/XMEGA/USBController_XMEGA.c

@@ -35,7 +35,7 @@
 #define  __INCLUDE_FROM_USB_CONTROLLER_C
 #include "../USBController.h"
 
-#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
+#if defined(USB_CAN_BE_BOTH)
 volatile uint8_t USB_CurrentMode = USB_MODE_None;
 #endif
 
@@ -43,7 +43,7 @@ volatile uint8_t USB_CurrentMode = USB_MODE_None;
 volatile uint8_t USB_Options;
 #endif
 
-/* Ugly workaround to ensure an aligned table, since __BIGGEST_ALIGNMENT__ == 1 for 8-bit AVR-GCC */
+/* Ugly workaround to ensure an aligned table, since __BIGGEST_ALIGNMENT__ == 1 for the 8-bit AVR-GCC toolchain */
 uint8_t USB_EndpointTable[sizeof(USB_EndpointTable_t) + 1];
 
 void USB_Init(
@@ -66,8 +66,6 @@ void USB_Init(
 	USB_Options = Options;
 	#endif
 
-	USB_IsInitialized = true;
-
 	uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
 	GlobalInterruptDisable();
 
@@ -89,6 +87,12 @@ void USB_Init(
 
 	SetGlobalInterruptMask(CurrentGlobalInt);
 
+	#if defined(USB_CAN_BE_BOTH)
+	USB_CurrentMode = Mode;
+	#endif
+	
+	USB_IsInitialized = true;
+	
 	USB_ResetInterface();
 }
 

LUFA/Drivers/USB/Core/XMEGA/USBController_XMEGA.h

@@ -70,7 +70,6 @@
 
 		/* External Variables: */
 			extern uint8_t USB_EndpointTable[];
-
 	#endif
 
 	/* Includes: */
@@ -176,8 +175,10 @@
 			 *  Calling this function when the USB interface is already initialized will cause a complete USB
 			 *  interface reset and re-enumeration.
 			 *
-			 *  \param[in] Mode     This is a mask indicating what mode the USB interface is to be initialized to, a value
+			 *  \param[in] Mode     Mask indicating what mode the USB interface is to be initialized to, a value
 			 *                      from the \ref USB_Modes_t enum.
+			 *                      \note This parameter does not exist on devices with only one supported USB
+			 *                            mode (device or host).
 			 *
 			 *  \param[in] Options  Mask indicating the options which should be used when initializing the USB
 			 *                      interface to control the USB interface's behavior. This should be comprised of
@@ -232,7 +233,7 @@
 			void USB_ResetInterface(void);
 
 		/* Global Variables: */
-			#if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
+			#if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__)
 				/** Indicates the mode that the USB interface is currently initialized to, a value from the
 				 *  \ref USB_Modes_t enum.
 				 *
@@ -247,7 +248,9 @@
 				 *        USB interface is not initialized.
 				 */
 				extern volatile uint8_t USB_CurrentMode;
-			#elif defined(USB_DEVICE_ONLY)
+			#elif defined(USB_CAN_BE_HOST)
+				#define USB_CurrentMode USB_MODE_Host
+			#elif defined(USB_CAN_BE_DEVICE)
 				#define USB_CurrentMode USB_MODE_Device
 			#endif