From 1815ab1ef7d448bf1abc926d4cdd1084c577bbf7 Mon Sep 17 00:00:00 2001
From: Michael Moon <triffid.hunter@gmail.com>
Date: Fri, 4 Feb 2011 11:04:15 +1100
Subject: [PATCH] make it even harder to unintentionally include fuse
 definitions

---
 fuses.h | 60 +++++++++++++++++++++++++++++----------------------------
 1 file changed, 31 insertions(+), 29 deletions(-)

diff --git a/fuses.h b/fuses.h
index dc7191e..ce5bf6a 100644
--- a/fuses.h
+++ b/fuses.h
@@ -1,29 +1,31 @@
-#ifdef FUSES
-	#if defined (__AVR_ATmega168__)
-	FUSES = {
-		.low = FUSE_CKSEL3 & FUSE_SUT0,
-		.high = FUSE_SPIEN,
-		.extended = FUSE_BOOTSZ1 & FUSE_BOOTSZ0,
-	};
-	#elif defined (__AVR_ATmega328P__)
-	FUSES = {
-		.low = FUSE_CKSEL3 & FUSE_SUT0,
-		.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
-		.extended = EFUSE_DEFAULT,
-	};
-	#elif defined (__AVR_ATmega644__) || defined (__AVR_ATmega644P__)
-	FUSES = {
-		.low = FUSE_CKSEL3 & FUSE_SUT0,
-		.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
-		.extended = EFUSE_DEFAULT,
-	};
-	#elif defined (__AVR_ATmega1280__)
-	FUSES = {
-		.low = FUSE_CKSEL3 & FUSE_SUT0,
-		.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
-		.extended = EFUSE_DEFAULT,
-	};
-	#else
-		#warning No fuse definitions for this chip in fuses.h!
-	#endif
-#endif	/* FUSES */
+#ifndef	_FUSES_H
+	#ifdef _INCLUDE_FUSES
+		#if defined (__AVR_ATmega168__)
+		FUSES = {
+			.low = FUSE_CKSEL3 & FUSE_SUT0,
+			.high = FUSE_SPIEN,
+			.extended = FUSE_BOOTSZ1 & FUSE_BOOTSZ0,
+		};
+		#elif defined (__AVR_ATmega328P__)
+		FUSES = {
+			.low = FUSE_CKSEL3 & FUSE_SUT0,
+			.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+			.extended = EFUSE_DEFAULT,
+		};
+		#elif defined (__AVR_ATmega644__) || defined (__AVR_ATmega644P__)
+		FUSES = {
+			.low = FUSE_CKSEL3 & FUSE_SUT0,
+			.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+			.extended = EFUSE_DEFAULT,
+		};
+		#elif defined (__AVR_ATmega1280__)
+		FUSES = {
+			.low = FUSE_CKSEL3 & FUSE_SUT0,
+			.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+			.extended = EFUSE_DEFAULT,
+		};
+		#else
+			#warning No fuse definitions for this chip in fuses.h!
+		#endif
+	#endif	/* _INCLUDE_FUSES */
+#endif	/* _FUSES_H */