X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/0b6d5467bc70ba36ff71a186da9cf4d0742612a6..46aea9d4ce0948f2340bfddc1c5a1bcc889e8840:/Projects/AVRISP-MKII/Lib/V2Protocol.h

diff --git a/Projects/AVRISP-MKII/Lib/V2Protocol.h b/Projects/AVRISP-MKII/Lib/V2Protocol.h
index 8e9e6ff38..33ef431cd 100644
--- a/Projects/AVRISP-MKII/Lib/V2Protocol.h
+++ b/Projects/AVRISP-MKII/Lib/V2Protocol.h
@@ -58,9 +58,18 @@
 			#endif
 		#endif
 
-		#if defined(USB_SERIES_4_AVR) && ((VTARGET_ADC_CHANNEL == 2) || (VTARGET_ADC_CHANNEL == 3))
+		#if defined(USB_SERIES_4_AVR) && ((VTARGET_ADC_CHANNEL == 2) || (VTARGET_ADC_CHANNEL == 3)) && !defined(NO_VTARGET_DETECT)
 			#error The U4 AVR chips do not contain ADC channels 2 or 3. Please change VTARGET_ADC_CHANNEL or define NO_VTARGET_DETECT in the makefile.
 		#endif
+		
+		#if defined(VTARGET_USE_INTERNAL_REF)
+			#undef  VTARGET_REF_VOLTS
+			#define VTARGET_REF_VOLTS 2.56
+			
+			#define VTARGET_REF_MASK ADC_REFERENCE_INT2560MV
+		#else
+			#define VTARGET_REF_MASK ADC_REFERENCE_AVCC
+		#endif
 
 	/* Macros: */
 		/** Programmer ID string, returned to the host during the CMD_SIGN_ON command processing. */