Added LED flashing to the CDC and DFU class bootloaders to indicate when they are running.

Bootloaders/CDC/BootloaderCDC.c

@@ -66,6 +66,9 @@ int main(void)
 	/* Setup hardware required for the bootloader */
 	SetupHardware();
 
+	/* Turn on first LED on the board to indicate that the bootloader has started */
+	LEDs_SetAllLEDs(LEDS_LED1);
+
 	/* Enable global interrupts so that the USB stack can function */
 	sei();
 
@@ -100,6 +103,17 @@ void SetupHardware(void)
 
 	/* Initialize USB Subsystem */
 	USB_Init();
+	LEDs_Init();
+	
+	/* Bootloader active LED toggle timer initialization */
+	TIMSK1 = (1 << TOIE1);
+	TCCR1B = ((1 << CS11) | (1 << CS10));	
+}
+
+/** ISR to periodically toggle the LEDs on the board to indicate that the bootloader is active. */
+ISR(TIMER1_OVF_vect, ISR_BLOCK)
+{
+	LEDs_ToggleLEDs(LEDS_LED1 | LEDS_LED2);
 }
 
 /** Event handler for the USB_ConfigurationChanged event. This configures the device's endpoints ready

Bootloaders/CDC/BootloaderCDC.h

@@ -48,6 +48,7 @@
 		#include "Descriptors.h"
 
 		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/Board/LEDs.h>
 
 	/* Macros: */
 		/** Version major of the CDC bootloader. */

Bootloaders/DFU/BootloaderDFU.c

@@ -119,6 +119,9 @@ int main(void)
 	MCUCR &= ~(1 << JTD);	
 	#endif
 
+	/* Turn on first LED on the board to indicate that the bootloader has started */
+	LEDs_SetAllLEDs(LEDS_LED1);
+
 	/* Enable global interrupts so that the USB stack can function */
 	sei();
 
@@ -149,6 +152,11 @@ void SetupHardware(void)
 
 	/* Initialize the USB subsystem */
 	USB_Init();
+	LEDs_Init();
+	
+	/* Bootloader active LED toggle timer initialization */
+	TIMSK1 = (1 << TOIE1);
+	TCCR1B = ((1 << CS11) | (1 << CS10));
 }
 
 /** Resets all configured hardware required for the bootloader back to their original states. */
@@ -162,6 +170,12 @@ void ResetHardware(void)
 	MCUCR = 0;
 }
 
+/** ISR to periodically toggle the LEDs on the board to indicate that the bootloader is active. */
+ISR(TIMER1_OVF_vect, ISR_BLOCK)
+{
+	LEDs_ToggleLEDs(LEDS_LED1 | LEDS_LED2);
+}
+
 /** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
  *  the device from the USB host before passing along unhandled control requests to the library for processing
  *  internally.

Bootloaders/DFU/BootloaderDFU.h

@@ -50,6 +50,7 @@
 		#include "Descriptors.h"
 
 		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/Board/LEDs.h>
 
 	/* Macros: */
 		/** Configuration define. Define this token to true to case the bootloader to reject all memory commands

LUFA/ManPages/ChangeLog.txt

@@ -33,6 +33,7 @@
   *   - Added new KeyboardMouseMultiReport Device ClassDriver demo
   *   - Added new VirtualSerialMassStorage Device ClassDriver demo
   *   - Added HID class bootloader, compatible with a modified version of the command line Teensy loader from PJRC.com
+  *   - Added LED flashing to the CDC and DFU class bootloaders to indicate when they are running
   *
   *  <b>Changed:</b>
   *  - Core: