From 2a718c4d704b39424c80a941c3f06551e99ee4e2 Mon Sep 17 00:00:00 2001
From: Mark Watkins <jedimark@users.sourceforge.net>
Date: Tue, 20 Dec 2011 11:09:11 +1000
Subject: [PATCH] Oximetry fix to pulse rate high bit

---
 oximetry.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/oximetry.cpp b/oximetry.cpp
index b70952af..2b6ca6a3 100644
--- a/oximetry.cpp
+++ b/oximetry.cpp
@@ -453,7 +453,7 @@ void CMS50Serial::import_process()
     bool first=true;
     while (i<(size-3)) {
         a=data.at(i++); // low bits are supposedly the high bits of the heart rate
-        pl=(data.at(i++) & 0x7f) | ((a & 3) << 7);
+        pl=((data.at(i++) & 0x7f) | ((a & 1) << 7)) & 0xff;
         o2=data.at(i++);
         if (pl!=0) {
             if (lastpl!=pl) {