From 15a964bb902d274cde3c397188f6d7c8f72521eb Mon Sep 17 00:00:00 2001
From: Kaspar Emanuel <kaspar.emanuel@gmail.com>
Date: Sun, 12 Mar 2017 17:46:00 +0000
Subject: [PATCH] Add infinite loop after wdt_enable call

Currently when using Leonardo and derivatives reseting the watchdog in the main sketch code will interfere with the bootloader reset.  This solution was proposed [by pjanco in the arduino.cc](http://forum.arduino.cc/index.php?topic=401628.msg2782592#msg2782592) forums.
---
 hardware/arduino/avr/cores/arduino/CDC.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hardware/arduino/avr/cores/arduino/CDC.cpp b/hardware/arduino/avr/cores/arduino/CDC.cpp
index 0a743e1ea95..b460edf8b04 100644
--- a/hardware/arduino/avr/cores/arduino/CDC.cpp
+++ b/hardware/arduino/avr/cores/arduino/CDC.cpp
@@ -128,6 +128,8 @@ bool CDC_Setup(USBSetup& setup)
 				// Store boot key
 				*(uint16_t *)magic_key_pos = MAGIC_KEY;
 				wdt_enable(WDTO_120MS);
+				// Go into infinite loop to avoid any watchdog resets or disable calls
+				while(1);
 			}
 			else
 			{