From 6cfc5c23cc3c430d4f160c87418ad6906341d7b8 Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Tue, 21 Oct 2014 12:57:41 +0200
Subject: [avr] Made SPI.begin() and SPI.end() synchronized (Andrew Kroll)

---
 libraries/SPI/SPI.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'libraries/SPI/SPI.h')

diff --git a/libraries/SPI/SPI.h b/libraries/SPI/SPI.h
index 24ebc12..c8d4ce3 100644
--- a/libraries/SPI/SPI.h
+++ b/libraries/SPI/SPI.h
@@ -2,6 +2,7 @@
  * Copyright (c) 2010 by Cristian Maglie <c.maglie@bug.st>
  * Copyright (c) 2014 by Paul Stoffregen <paul@pjrc.com> (Transaction API)
  * Copyright (c) 2014 by Matthijs Kooijman <matthijs@stdin.nl> (SPISettings AVR)
+ * Copyright (c) 2014 by Andrew J. Kroll <xxxajk@gmail.com> (atomicity fixes)
  * SPI Master library for arduino.
  *
  * This file is free software; you can redistribute it and/or modify
@@ -281,6 +282,7 @@ public:
   inline static void detachInterrupt() { SPCR &= ~_BV(SPIE); }
 
 private:
+  static uint8_t initialized;
   static uint8_t interruptMode; // 0=none, 1=mask, 2=global
   static uint8_t interruptMask; // which interrupts to mask
   static uint8_t interruptSave; // temp storage, to restore state
-- 
cgit v1.2.3-18-g5258