From 559dc4bb5d3f156cf3b9c50c45aaeb842426466e Mon Sep 17 00:00:00 2001
From: Andrzej Kapolka <drzej.k@gmail.com>
Date: Wed, 10 Jul 2013 15:07:39 -0700
Subject: [PATCH] Flush the queue so that we don't get any funny data on the
 initial read.

---
 interface/src/SerialInterface.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/interface/src/SerialInterface.cpp b/interface/src/SerialInterface.cpp
index 1fb5ef8985..733ba0386f 100644
--- a/interface/src/SerialInterface.cpp
+++ b/interface/src/SerialInterface.cpp
@@ -99,6 +99,9 @@ void SerialInterface::initializePort(char* portname) {
         int currentFlags = fcntl(_serialDescriptor, F_GETFL);
         fcntl(_serialDescriptor, F_SETFL, currentFlags & ~O_NONBLOCK);
         
+        // make sure there's nothing queued up to be read
+        tcflush(_serialDescriptor, TCIOFLUSH);
+        
         // this disables streaming so there's no garbage data on reads
         write(_serialDescriptor, "SD\n", 3);
         char result[4];