X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/b9b03aadb219d06fbad9d110e508db93e45461af..abc7dce10c03bcbc9659e1a9643cec30c465867d:/Demos/Device/LowLevel/USBtoSerial/Descriptors.h

diff --git a/Demos/Device/LowLevel/USBtoSerial/Descriptors.h b/Demos/Device/LowLevel/USBtoSerial/Descriptors.h
index 41b44300a..a3d101e8b 100644
--- a/Demos/Device/LowLevel/USBtoSerial/Descriptors.h
+++ b/Demos/Device/LowLevel/USBtoSerial/Descriptors.h
@@ -41,13 +41,17 @@
 
 		#include <avr/pgmspace.h>
 
+		#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
+			#warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
+		#endif
+		
 	/* Macros: */
 		/** Macro to define a CDC class-specific functional descriptor. CDC functional descriptors have a
 		 *  uniform structure but variable sized data payloads, thus cannot be represented accurately by
 		 *  a single typedef struct. A macro is used instead so that functional descriptors can be created
 		 *  easily by specifying the size of the payload. This allows sizeof() to work correctly.
 		 *
-		 *  \param DataSize  Size in bytes of the CDC functional descriptor's data payload
+		 *  \param[in] DataSize  Size in bytes of the CDC functional descriptor's data payload
 		 */
 		#define CDC_FUNCTIONAL_DESCRIPTOR(DataSize)        \
 		     struct                                        \