From 0ea849e7ff5989a9b8317c0b27665ea8c7eda5f3 Mon Sep 17 00:00:00 2001
From: Sissors <erik_olieman@hotmail.com>
Date: Fri, 10 Oct 2014 21:25:09 +0200
Subject: [PATCH] [API] Timer-start behavior (bug)fix

Only start the timer when it is not running currently. In old behavior
the current slice-time was discarded, now multiple starts have no
effect.
---
 libraries/mbed/common/Timer.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libraries/mbed/common/Timer.cpp b/libraries/mbed/common/Timer.cpp
index d4ed133125..e00eaaf543 100644
--- a/libraries/mbed/common/Timer.cpp
+++ b/libraries/mbed/common/Timer.cpp
@@ -23,8 +23,10 @@ Timer::Timer() : _running(), _start(), _time() {
 }
 
 void Timer::start() {
-    _start = us_ticker_read();
-    _running = 1;
+    if (!_running) {
+        _start = us_ticker_read();
+        _running = 1;
+    }
 }
 
 void Timer::stop() {