From 228cea866504bdd7cbca2e06b42f9de789eb791a Mon Sep 17 00:00:00 2001
From: Steve Marple <stevemarple@googlemail.com>
Date: Thu, 24 Jan 2013 20:28:53 +0000
Subject: [PATCH] Clear only the watchdog bit in MCUSR before resetting the
 watchdog.

Preserve other bits so that user application can find out reason for
reboot.
---
 xboot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xboot.c b/xboot.c
index ebedb66..3b79a58 100644
--- a/xboot.c
+++ b/xboot.c
@@ -309,7 +309,7 @@ int main(void)
         
 #ifndef __AVR_XMEGA__
         // ATMEGA must reset via watchdog, so turn it off
-        MCUSR = 0;
+	MCUSR &= ~(1 << WDRF);
         wdt_disable();
 #endif