Clean up of the altered XPLAINBridge project.

Projects/AVRISP-MKII/Descriptors.c

@@ -156,6 +156,9 @@ USB_Descriptor_String_t PROGMEM ProductString =
 	.UnicodeString          = L"LUFA AVRISP MkII Clone"
 };
 
+/** Serial number string. This is a Unicode string containing the device's unique serial number, expressed as a
+ *  series of uppercase hexadecimal digits.
+ */
 USB_Descriptor_String_t PROGMEM SerialString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},

Projects/XPLAINBridge/Doxygen.conf

@@ -25,7 +25,7 @@ DOXYFILE_ENCODING      = UTF-8
 # The PROJECT_NAME tag is a single word (or a sequence of words surrounded
 # by quotes) that should identify the project.
 
-PROJECT_NAME           = "LUFA Library - XPLAIN Serial Bridge Device Demo"
+PROJECT_NAME           = "LUFA Library - XPLAIN Serial Bridge/PDI Programmer Device Demo"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number.
 # This could be handy for archiving the generated documentation or

Projects/XPLAINBridge/USARTDescriptors.c

@@ -226,6 +226,9 @@ USB_Descriptor_String_t PROGMEM USART_ProductString =
 	.UnicodeString          = L"LUFA XPLAIN Bridge"
 };
 
+/** Descriptior retrieval function for the USART Bridge descriptors. This function is in turn called by the GetDescriptor
+ *  callback function in the main source file, to retrieve the device's descriptors when in USART bridge mode.
+ */
 uint16_t USART_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
 {
 	const uint8_t  DescriptorType   = (wValue >> 8);

Projects/XPLAINBridge/XPLAINBridge.h

@@ -69,7 +69,10 @@
 		/** LED mask for the library LED driver, to indicate that the USB interface is busy. */
 		#define LEDMASK_BUSY             LEDS_LED1
 
+		/** Firmware mode define for the USART Bridge mode. */
 		#define MODE_USART_BRIDGE        false
+
+		/** Firmware mode define for the AVRISP Programmer mode. */
 		#define MODE_PDI_PROGRAMMER      true		
 
 	/* External Variables: */

Projects/XPLAINBridge/XPLAINBridge.txt

@@ -4,7 +4,7 @@
  *  documentation pages. It is not a project source file.
  */
  
-/** \mainpage XPLAIN UART Bridge Project
+/** \mainpage XPLAIN UART Bridge/PDI Programmer Project
  *
  *  \section SSec_Compat Project Compatibility:
  *
@@ -20,37 +20,48 @@
  *   <tr>
  *    <td><b>USB Mode:</b></td>
  *    <td>Device</td>
+ *    <td>Device</td>
  *   </tr>
  *   <tr>
  *    <td><b>USB Class:</b></td>
- *    <td>Communications Device Class (CDC)</td>
+ *    <td>1) Communications Device Class (CDC)</td>
+ *    <td>2) Vendor Specific Class</td>
  *   </tr>
  *   <tr> 
  *    <td><b>USB Subclass:</b></td>
- *    <td>Abstract Control Model (ACM)</td>
+ *    <td>1) Abstract Control Model (ACM)</td>
+ *    <td>2) N/A</td>
  *   </tr>
  *   <tr>
  *    <td><b>Relevant Standards:</b></td>
- *    <td>USBIF CDC Class Standard</td>
+ *    <td>1) USBIF CDC Class Standard</td>
+ *    <td>2) Atmel AVRISP MKII Protocol Specification</td>
  *   </tr>
  *   <tr>
  *    <td><b>Usable Speeds:</b></td>
  *    <td>Full Speed Mode</td>
+ *    <td>Full Speed Mode</td>
  *   </tr>
  *  </table>
  *
  *  \section SSec_Description Project Description: 
  *
- *  This is a virtual serial port to soft-UART converter, for use on the Atmel XPLAIN boards. This project replaces the firmware
- *  preloaded onto the XPLAIN's onboard AT90USB1287 microcontroller to act as a a UART-to-USB bridge between the device and the
- *  host. When inserted, the device will enumerate as a regular COM port on the host, which can then be opened and data exchanged
- *  between the XMEGA and Host as if the XMEGA was connected directly to the host's serial port.
+ *  This project serves a dual purpose. When loaded into the USB AVR on the XPLAIN board, it will act as either a USB to Serial
+ *  converter for the XPLAIN's hardware USART (at a speed of 9600 baud), or a PDI programmer for the XMEGA. This project replaces
+ *  the firmware preloaded onto the XPLAIN's onboard AT90USB1287 microcontroller.
+ *
+ *  When inserted, the JTAG port's TDI pin is read. If the pin is left high, the device will enumerate as a regular COM port on
+ *  the host, which can then be opened and data exchanged between the XMEGA and Host as if the XMEGA was connected directly to
+ *  the host's serial port. If the pin is pulled low, the device will enumerate as an AVRISP-MKII to the host, so that the XMEGA
+ *  can be reprogrammed by AVRStudio or other compatible software such as avrdude.
  *
  *  After running this project for the first time on a new computer, you will need to supply the .INF file located in this project
  *  project's directory as the device's driver when running under Windows. This will enable Windows to use its inbuilt CDC drivers,
  *  negating the need for custom drivers for the device. Other Operating Systems should automatically use their own inbuilt CDC-ACM
  *  drivers.
  *
+ *  This project relies on files from the LUFA AVRISP-MKII project.
+ *
  *  \section SSec_Options Project Options
  *
  *  The following defines can be found in this project, which can control the project behaviour when defined, or changed in value.