From: R. Steve McKown <rsmckown@gmail.com>
Date: Wed, 1 Sep 2010 02:36:44 +0000 (-0600)
Subject: Volatile keyword tricks GCC into not optimizing out busy wait loop.
X-Git-Tag: release/2.1.1-4.4~12
X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=tinyos-2.x.git;a=commitdiff_plain;h=121ddd3843c9a283e25a016eddbbe5e60e063f8c

Volatile keyword tricks GCC into not optimizing out busy wait loop.
---

diff --git a/tos/platforms/tmicore/MoteClockP.nc b/tos/platforms/tmicore/MoteClockP.nc
index ca169f27..a9a97684 100644
--- a/tos/platforms/tmicore/MoteClockP.nc
+++ b/tos/platforms/tmicore/MoteClockP.nc
@@ -41,7 +41,7 @@ module MoteClockP {
 implementation {
   command error_t Init.init()
   {
-    uint16_t i;
+    volatile uint16_t i;
 
 #if defined (CALDCO_8MHZ_) && !defined(__DisableCalData)
     if (CALBC1_8MHZ != 0xff || CALDCO_8MHZ != 0xff) {