From 7bb1721f35224b792c2cedcc73969b41c3d7c3f2 Mon Sep 17 00:00:00 2001
From: Thomas Moore <tcm0116@gmail.com>
Date: Fri, 24 Nov 2017 22:34:39 -0600
Subject: [PATCH] Fix _BV already defined warnings for Teensy

---
 Marlin/src/HAL/HAL_TEENSY35_36/HAL_Teensy.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Marlin/src/HAL/HAL_TEENSY35_36/HAL_Teensy.h b/Marlin/src/HAL/HAL_TEENSY35_36/HAL_Teensy.h
index f4de615a6d..b5dfb60802 100644
--- a/Marlin/src/HAL/HAL_TEENSY35_36/HAL_Teensy.h
+++ b/Marlin/src/HAL/HAL_TEENSY35_36/HAL_Teensy.h
@@ -30,6 +30,9 @@
 // Includes
 // --------------------------------------------------------------------------
 
+// _BV is re-defined in Arduino.h
+#undef _BV
+
 #include <Arduino.h>
 
 // Redefine sq macro defined by teensy3/wiring.h
-- 
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