X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d1e52660368d34d693131f6aff3c8fd8584162e5..b462f2d457ec2f0cfa22a1c3db198cb22f6809a1:/LUFA/Drivers/USB/USB.h

diff --git a/LUFA/Drivers/USB/USB.h b/LUFA/Drivers/USB/USB.h
index 3c8f06237..9abd275cc 100644
--- a/LUFA/Drivers/USB/USB.h
+++ b/LUFA/Drivers/USB/USB.h
@@ -54,14 +54,23 @@
  *  Functions, macros, variables, enums and types related to the management of USB communications.
  */
 
+/** \ingroup Group_USB
+ *  @defgroup Group_USBClassDrivers USB Class Drivers
+ *
+ *  Drivers for both host and device mode of the standard USB classes, for rapid application development.
+ *  Class drivers give a framework which sits on top of the low level library API, allowing for standard
+ *  USB classes to be implemented in a project with minimal user code. These drivers can be used in
+ *  conjunction with the library low level APIs to implement interfaces both via the class drivers and via
+ *  the standard library APIs.
+ *
+ *  Multiple device mode class drivers can be used within a project, including multiple instances of the
+ *  same class driver.
+ */
+ 
 #ifndef __USB_H__
 #define __USB_H__
 
-	/* Preprocessor Checks: */
-		#if (!(defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__)) && defined(USB_HOST_ONLY))
-			#error USB_HOST_ONLY is not available for the currently selected USB AVR model.
-		#endif
-		
+	/* Preprocessor Checks: */		
 		#if (!(defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) ||  \
 		       defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) ||  \
 			   defined(__AVR_AT90USB162__)  || defined(__AVR_AT90USB82__)  ||  \