Add experimental support for the AVR32 UC3A4 microcontrollers.

Add support for the inbuilt unique serial numbers in the UC3A3 and UC3A4 models.

LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h

@@ -87,9 +87,9 @@
 			//@}
 			
 			#if (!defined(NO_INTERNAL_SERIAL) && \
-			     (defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__) || \
-			      defined(__AVR_ATmega32U6__) || defined(__AVR_AT90USB646__)  || defined(__AVR_AT90USB1286__) ||  \
-			      defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U2__)  || defined(__AVR_ATmega8U2__)))
+			     (defined(USB_SERIES_7_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_4_AVR) || \
+			      (defined(USB_SERIES_2_AVR) && (!defined(__AVR_AT90USB82__) || defined(__AVR_AT90USB162__))) || \
+				  defined(__DOXYGEN__)))
 				/** String descriptor index for the device's unique serial number string descriptor within the device.
 				 *  This unique serial number is used by the host to associate resources to the device (such as drivers or COM port
 				 *  number allocations) to a device regardless of the port it is plugged in to on the host. Some microcontrollers contain
@@ -190,7 +190,7 @@
 				return (UDADDR & (1 << ADDEN));
 			}
 		
-			static inline uint8_t USB_Device_GetSerialString(wchar_t* UnicodeString, const uint8_t MaxLen)
+			static inline uint8_t USB_Device_GetSerialString(uint16_t* UnicodeString, const uint8_t MaxLen)
 			{
 				uint8_t SerialCharNum = 0;
 
@@ -213,8 +213,8 @@
 
 						SerialByte &= 0x0F;
 
-						UnicodeString[SerialCharNum] = (SerialByte >= 10) ?
-						                               (('A' - 10) + SerialByte) : ('0' + SerialByte);
+						UnicodeString[SerialCharNum] = cpu_to_le16((SerialByte >= 10) ?
+						                                           (('A' - 10) + SerialByte) : ('0' + SerialByte));
 					}
 				}
 				

LUFA/Drivers/USB/Core/DeviceStandardReq.c

@@ -204,12 +204,12 @@ static void USB_Device_GetInternalSerialDescriptor(void)
 	struct
 	{
 		USB_Descriptor_Header_t Header;
-		wchar_t                 UnicodeString[20];
+		uint16_t                UnicodeString[20];
 	} SignatureDescriptor;
 
 	SignatureDescriptor.Header.Type = DTYPE_String;
-	SignatureDescriptor.Header.Size = USB_Device_GetSerialString(SignatureDescriptor.UnicodeString,
-	                                                             sizeof(SignatureDescriptor.UnicodeString));
+	SignatureDescriptor.Header.Size = USB_STRING_LEN(USB_Device_GetSerialString(SignatureDescriptor.UnicodeString,
+	                                                 sizeof(SignatureDescriptor.UnicodeString) / sizeof(SignatureDescriptor.UnicodeString[0])));
 
 	Endpoint_ClearSETUP();
 

LUFA/Drivers/USB/Core/StdDescriptors.h

@@ -645,15 +645,15 @@
 				uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t
 				                          *   or a value given by the specific class.
 				                          */
-				int16_t bString[]; /**< String data, as unicode characters (alternatively, string language IDs).
-				                    *   If normal ASCII characters are to be used, they must be added as an array
-				                    *   of characters rather than a normal C string so that they are widened to
-				                    *   Unicode size.
-				                    *
-				                    *   Under GCC, strings prefixed with the "L" character (before the opening string
-				                    *   quotation mark) are considered to be Unicode strings, and may be used instead
-				                    *   of an explicit array of ASCII characters.
-				                    */
+				uint16_t bString[]; /**< String data, as unicode characters (alternatively, string language IDs).
+				                     *   If normal ASCII characters are to be used, they must be added as an array
+				                     *   of characters rather than a normal C string so that they are widened to
+				                     *   Unicode size.
+				                     *
+				                     *   Under GCC, strings prefixed with the "L" character (before the opening string
+				                     *   quotation mark) are considered to be Unicode strings, and may be used instead
+				                     *   of an explicit array of ASCII characters.
+				                     */
 			} ATTR_PACKED USB_StdDescriptor_String_t;
 
 	/* Private Interface - For use in library only: */

LUFA/Drivers/USB/Core/UC3/Device_UC3.h

@@ -77,16 +77,22 @@
 			#define USB_DEVICE_OPT_FULLSPEED               (0 << 0)
 			//@}
 			
-			/** String descriptor index for the device's unique serial number string descriptor within the device.
-			 *  This unique serial number is used by the host to associate resources to the device (such as drivers or COM port
-			 *  number allocations) to a device regardless of the port it is plugged in to on the host. Some microcontrollers contain
-			 *  a unique serial number internally, and setting the device descriptors serial number string index to this value
-			 *  will cause it to use the internal serial number.
-			 *
-			 *  On unsupported devices, this will evaluate to \ref NO_DESCRIPTOR and so will force the host to create a pseudo-serial
-			 *  number for the device.
-			 */
-			#define USE_INTERNAL_SERIAL                    NO_DESCRIPTOR
+			#if (!defined(NO_INTERNAL_SERIAL) && \
+			     (defined(USB_SERIES_UC3A3_AVR) || defined(USB_SERIES_UC3A4_AVR) || \
+				  defined(__DOXYGEN__)))
+				/** String descriptor index for the device's unique serial number string descriptor within the device.
+				 *  This unique serial number is used by the host to associate resources to the device (such as drivers or COM port
+				 *  number allocations) to a device regardless of the port it is plugged in to on the host. Some microcontrollers contain
+				 *  a unique serial number internally, and setting the device descriptors serial number string index to this value
+				 *  will cause it to use the internal serial number.
+				 *
+				 *  On unsupported devices, this will evaluate to \ref NO_DESCRIPTOR and so will force the host to create a pseudo-serial
+				 *  number for the device.
+				 */
+				#define USE_INTERNAL_SERIAL           0xDC
+			#else
+				#define USE_INTERNAL_SERIAL           NO_DESCRIPTOR
+			#endif	
 			
 		/* Function Prototypes: */
 			/** Sends a Remote Wakeup request to the host. This signals to the host that the device should
@@ -171,6 +177,37 @@
 			{
 				return AVR32_USBB.UDCON.adden;
 			}
+
+			static inline uint8_t USB_Device_GetSerialString(uint16_t* UnicodeString, const uint8_t MaxLen)
+			{
+				uint8_t SerialCharNum = 0;
+
+				ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
+				{
+					uint32_t* SigReadAddress = 0x80800204;
+
+					for (SerialCharNum = 0; SerialCharNum < MIN(MaxLen, 30); SerialCharNum++)
+					{
+						if (SerialCharNum == MaxLen)
+						  break;
+
+						uint8_t SerialByte = *SigReadAddress;
+
+						if (SerialCharNum & 0x01)
+						{
+							SerialByte >>= 4;
+							SigReadAddress++;
+						}
+
+						SerialByte &= 0x0F;
+
+						UnicodeString[SerialCharNum] = cpu_to_le16((SerialByte >= 10) ?
+						                                           (('A' - 10) + SerialByte) : ('0' + SerialByte));
+					}
+				}
+				
+				return SerialCharNum;
+			}
 	#endif
 
 #endif

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

@@ -294,7 +294,7 @@
 	/* Private Interface - For use in library only: */
 	#if !defined(__DOXYGEN__)
 		/* Macros: */			
-			#if defined(USB_SERIES_UC3A3_AVR)
+			#if (defined(USB_SERIES_UC3A3_AVR) || defined(USB_SERIES_UC3A4_AVR))
 				#define USB_CLOCK_REQUIRED_FREQ  12000000UL
 			#else
 				#define USB_CLOCK_REQUIRED_FREQ  48000000UL

LUFA/Drivers/USB/Core/USBMode.h

@@ -153,6 +153,12 @@
 				#define USB_SERIES_UC3A3_AVR
 				#define USB_CAN_BE_DEVICE
 				#define USB_CAN_BE_HOST
+			#elif (defined(__AVR32_UC3A4256__) || defined(__AVR32_UC3A4256S__) || \
+			       defined(__AVR32_UC3A4128__) || defined(__AVR32_UC3A4128S__) || \
+			       defined(__AVR32_UC3A464__)  || defined(__AVR32_UC3A464S__))
+				#define USB_SERIES_UC3A4_AVR
+				#define USB_CAN_BE_DEVICE
+				#define USB_CAN_BE_HOST
 			#elif (defined(__AVR32_UC3B0512__) || defined(__AVR32_UC3B0256__) || \
 			       defined(__AVR32_UC3B0128__) || defined(__AVR32_UC3B064__))
 				#define USB_SERIES_UC3B0_AVR

LUFA/ManPages/DeviceSupport.txt

@@ -15,18 +15,24 @@
  *   - AT32UC3A164 (USB Host and Device)
  *   - AT32UC3A364 (USB Host and Device)
  *   - AT32UC3A364S (USB Host and Device)
+ *   - AT32UC3A464 (USB Host and Device)
+ *   - AT32UC3A464S (USB Host and Device)
  *   - AT32UC3B064 (USB Host and Device)
  *   - AT32UC3B164 (USB Host and Device)
  *   - AT32UC3A0128 (USB Host and Device)
  *   - AT32UC3A1128 (USB Host and Device)
  *   - AT32UC3A3128 (USB Host and Device)
  *   - AT32UC3A3128S (USB Host and Device)
+ *   - AT32UC3A4128 (USB Host and Device)
+ *   - AT32UC3A4128S (USB Host and Device)
  *   - AT32UC3B0128 (USB Host and Device)
  *   - AT32UC3B1128 (USB Host and Device)
  *   - AT32UC3A0256 (USB Host and Device)
  *   - AT32UC3A1256 (USB Host and Device)
  *   - AT32UC3A3256 (USB Host and Device)
  *   - AT32UC3A3256S (USB Host and Device)
+ *   - AT32UC3A4256 (USB Host and Device)
+ *   - AT32UC3A4256S (USB Host and Device)
  *   - AT32UC3B0256 (USB Host and Device)
  *   - AT32UC3B1256 (USB Host and Device)
  *   - AT32UC3A0512 (USB Host and Device)