X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/afe6ae14023c7040befe73e49d00077d3425c564..05fcf7e2a79bebb978d4aeaef26b12f70c6826f8:/LUFA/Drivers/USB/Class/CDC.h

diff --git a/LUFA/Drivers/USB/Class/CDC.h b/LUFA/Drivers/USB/Class/CDC.h
index 9cd3bcdea..2014a220b 100644
--- a/LUFA/Drivers/USB/Class/CDC.h
+++ b/LUFA/Drivers/USB/Class/CDC.h
@@ -29,7 +29,7 @@
 */
 
 /** \ingroup Group_USBClassDrivers
- *  @defgroup Group_USBClassCDC CDC Device Class Driver - LUFA/Drivers/Class/CDC.h
+ *  @defgroup Group_USBClassCDC CDC Class Driver - LUFA/Drivers/Class/CDC.h
  *
  *  \section Sec_Dependencies Module Source Dependencies
  *  The following files must be built with any user project that uses this module:
@@ -37,8 +37,12 @@
  *    - LUFA/Drivers/USB/Class/Host/CDC.c
  *
  *  \section Module Description
- *  Functions, macros, variables, enums and types related to the management of USB CDC Class interfaces
- *  within a USB device, for the implementation of CDC-ACM virtual serial ports.
+ *  CDC Class Driver module. This module contains an internal implementation of the USB CDC-ACM class Virtual Serial
+ *  Ports, for both Device and Host USB modes. User applications can use this class driver instead of implementing the
+ *  CDC 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 CDC Class.
  *
  *  @{
  */
@@ -49,6 +53,10 @@
 	/* 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/CDC.h"
 		#endif