Fix inverted bit-banged USART logic in the AVRISP project for PDI programming. Add a delay to the clock toggling in the AVRISP project to ensure that the programming speed does not exceed 10MHz under any conditions to satisfy the limits in the datasheet for all target voltages. Fix incorrect pin being used as the DATA in in PDI programming mode.

LUFA/Drivers/USB/LowLevel/Endpoint.h

@@ -338,7 +338,7 @@
 				 */
 				static inline void Endpoint_SetEndpointDirection(uint8_t DirectionMask);
 			#else
-				#if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) || defined(__DOXYGEN__)
+				#if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 					#define Endpoint_BytesInEndpoint()        UEBCX
 				#elif defined(USB_SERIES_4_AVR)
 					#define Endpoint_BytesInEndpoint()        (((uint16_t)UEBCHX << 8) | UEBCLX)				

LUFA/ManPages/ChangeLog.txt

@@ -56,6 +56,7 @@
   *  - Fixed TeensyHID bootloader not properly shutting down the USB interface to trigger a disconnection on the host before resetting
   *  - Fixed MassStorageHost Class driver demo not having USB_STREAM_TIMEOUT_MS compile time option set properly to prevent slow 
   *    devices from timing out the data pipes
+  *  - Fixed the definition of the Endpoint_BytesInEndpoint() macro for the U4 parts
   *
   *  \section Sec_ChangeLog091122 Version 091122
   *

Projects/AVRISP/Lib/PDIProtocol.c

@@ -110,9 +110,7 @@ static void PDIProtocol_EnterXPROGMode(void)
 	/* Must hold DATA line high for at least 90nS to enable PDI interface */
 	PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
 	asm volatile ("NOP"::);
-	#if (F_CPU > 8000000)
 	asm volatile ("NOP"::);
-	#endif
 	
 	/* Toggle CLOCK line 16 times within 100uS of the original 90nS timeout to keep PDI interface enabled */
 	for (uint8_t i = 0; i < 16; i++)
@@ -120,7 +118,7 @@ static void PDIProtocol_EnterXPROGMode(void)
 	
 	/* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
 	PDITarget_SendByte(PDI_CMD_KEY);	
-	for (uint8_t i = 0; i < 8; i++)
+	for (uint8_t i = 0; i < sizeof(PDI_NVMENABLE_KEY); i++)
 	  PDITarget_SendByte(PDI_NVMENABLE_KEY[i]);
 
 	/* Read out the STATUS register to check that NVM access was successfully enabled */

Projects/AVRISP/Lib/PDITarget.c

@@ -52,9 +52,9 @@ void PDITarget_SendByte(uint8_t Byte)
 	for (uint8_t i = 0; i < 8; i++)
 	{
 		if (Byte & 0x01)
-		  PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
-		else
 		  PDIDATA_LINE_PORT &= ~PDIDATA_LINE_MASK;
+		else
+		  PDIDATA_LINE_PORT |=  PDIDATA_LINE_MASK;
 		  
 		Byte >>= 1;
 

Projects/AVRISP/Lib/PDITarget.h

@@ -65,7 +65,7 @@
 			#define PDIDATA_LINE_PORT     PORTB
 			#define PDIDATA_LINE_DDR      DDRB
 			#define PDIDATA_LINE_PIN      PINB
-			#define PDIDATA_LINE_MASK     (1 << 2)
+			#define PDIDATA_LINE_MASK     (1 << 3)
 			
 			#define PDICLOCK_LINE_PORT    RESET_LINE_PORT
 			#define PDICLOCK_LINE_DDR     RESET_LINE_DDR
@@ -91,7 +91,9 @@
 		#define PDI_NVMENABLE_KEY     (uint8_t[]){0x12, 0x89, 0xAB, 0x45, 0xCD, 0xD8, 0x88, 0xFF}
 
 		#define TOGGLE_PDI_CLOCK      MACROS{ PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK; \
-		                                      PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK; }MACROE
+		                                      asm volatile ("NOP" ::);                  \
+		                                      PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK; \
+		                                      asm volatile ("NOP" ::);                  }MACROE
 		
 	/* Function Prototypes: */
 		void    PDITarget_SendByte(uint8_t Byte);

Projects/AVRISP/makefile

@@ -60,7 +60,7 @@
 
 
 # MCU name
-MCU = at90usb1287
+MCU = at90usb162
 
 
 # Target board (see library "Board Types" documentation, USER or blank for projects not requiring