Fixed USBtoSerial and XPLAINBridge demos discarding data from the PC if the send buffer becomes full.

LUFA/Drivers/USB/HighLevel/EndpointStream.h

@@ -51,7 +51,6 @@
 #define __ENDPOINT_STREAM_H__
 
 	/* Includes: */
-		#include <avr/io.h>
 		#include <avr/pgmspace.h>
 		#include <avr/eeprom.h>
 		#include <stdbool.h>

LUFA/Drivers/USB/HighLevel/PipeStream.h

@@ -51,7 +51,6 @@
 #define __PIPE_STREAM_H__
 
 	/* Includes: */
-		#include <avr/io.h>
 		#include <avr/pgmspace.h>
 		#include <avr/eeprom.h>
 		#include <stdbool.h>

LUFA/ManPages/ChangeLog.txt

@@ -93,6 +93,7 @@
   *  - Fixed random enumeration failure while in device mode due to interrupts causing the Set Address request to exceed maximum timings
   *  - Fixed MIDI_Host_Flush() not aborting early when the specified MIDI host interface was not configured
   *  - Fixed MIDI class driver send routines silently discarding packets if the endpoint or pipe is busy (thanks to Robin Green)
+  *  - Fixed USBtoSerial and XPLAINBridge demos discarding data from the PC if the send buffer becomes full
   *
   *  \section Sec_ChangeLog100807 Version 100807
   *  <b>New:</b>

LUFA/ManPages/LibraryResources.txt

@@ -20,6 +20,7 @@
  *
  *  \section Sec_InDevelopment Latest In-Development Source Code
  *  Issue Tracker: http://www.lufa-lib.org/tracker \n
+ *  Bazaar Access: http://www.lufa-lib.org/bzr \n
  *  SVN Access: http://www.lufa-lib.org/svn \n
  *  Git Access: http://www.lufa-lib.org/git \n
  *  Mercurial Access: http://www.lufa-lib.org/hg \n

Projects/USBtoSerial/USBtoSerial.c

@@ -81,15 +81,21 @@ int main(void)
 
 	for (;;)
 	{
-		/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
+		/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+		if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
+		{
 			int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
-		if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUSART_Buffer)))
+
+			/* Read bytes from the USB OUT endpoint into the USART transmit buffer */
+			if (!(ReceivedByte < 0))
 			  RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
+		}
 		
 		/* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */
 		RingBuff_Count_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
 		if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
 		{
+			/* Clear flush timer expiry flag */
 			TIFR0 |= (1 << TOV0);
 
 			/* Read bytes from the USART receive buffer into the USB IN endpoint */

Projects/XPLAINBridge/XPLAINBridge.c

@@ -119,15 +119,21 @@ void UARTBridge_Task(void)
 	if (USB_DeviceState != DEVICE_STATE_Configured)
 	  return;
 
-	/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+	/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+	if (!(RingBuffer_IsFull(&USBtoUART_Buffer)))
+	{
 		int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
-	if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
+
+		/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+		if (!(ReceivedByte < 0))
 		  RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
+	}
 	
 	/* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
 	RingBuff_Count_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
 	if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
 	{
+		/* Clear flush timer expiry flag */
 		TIFR0 |= (1 << TOV0);
 
 		/* Read bytes from the UART receive buffer into the USB IN endpoint */