X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/afe6ae14023c7040befe73e49d00077d3425c564..702bec892da743c5b2d57b6a3fa2404d4d17e928:/LUFA/Drivers/USB/Class/MIDI.h

diff --git a/LUFA/Drivers/USB/Class/MIDI.h b/LUFA/Drivers/USB/Class/MIDI.h
index 8b68480d3..d0f9eec0f 100644
--- a/LUFA/Drivers/USB/Class/MIDI.h
+++ b/LUFA/Drivers/USB/Class/MIDI.h
@@ -29,7 +29,7 @@
 */
 
 /** \ingroup Group_USBClassDrivers
- *  @defgroup Group_USBClassMIDI MIDI Device Class Driver - LUFA/Drivers/Class/MIDI.h
+ *  @defgroup Group_USBClassMIDI MIDI Class Driver - LUFA/Drivers/Class/MIDI.h
  *
  *  \section Sec_Dependencies Module Source Dependencies
  *  The following files must be built with any user project that uses this module:
@@ -37,9 +37,15 @@
  *    - LUFA/Drivers/USB/Class/Host/MIDI.c
  *
  *  \section Module Description
- *  Functions, macros, variables, enums and types related to the management of USB MIDI Class interfaces
- *  within a USB device. Note that the MIDI class is actually a special case of the regular Audio class,
- *  thus this module depends on structure definitions from the \ref Group_USBClassAudioDevice class driver module.
+ *  MIDI Class Driver module. This module contains an internal implementation of the USB MIDI Class, for both Device
+ *  and Host USB modes. User applications can use this class driver instead of implementing the MIDI class manually
+ *  via the low-level LUFA APIs.
+ *
+ *  This module is designed to simplify the user code by exposing only the required interface needed to interface with
+ *  Hosts or Devices using the USB MIDI Class.
+ *
+ *  \note The USB MIDI class is actually a special case of the regular Audio class, thus this module depends on
+ *        structure definitions from the \ref Group_USBClassAudioDevice class driver module.
  *
  *  @{
  */
@@ -50,10 +56,14 @@
 	/* Includes: */
 		#include "../HighLevel/USBMode.h"
 
+		#if defined(NO_STREAM_CALLBACKS)
+			#error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
+		#endif
+
 		#if defined(USB_CAN_BE_DEVICE)
 			#include "Device/MIDI.h"
 		#endif
-		
+
 		#if defined(USB_CAN_BE_HOST)
 			#include "Host/MIDI.h"
 		#endif