From df546ca369d297b66a7914f4f36fd9906f3ab753 Mon Sep 17 00:00:00 2001
From: Jonas Zeunert <zeunert@rhrk.uni-kl.de>
Date: Thu, 20 Sep 2018 20:58:58 +0200
Subject: [PATCH] fixed logic error

---
 FlippR-Driver/src/utilities/GPIOInterface.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/FlippR-Driver/src/utilities/GPIOInterface.cpp b/FlippR-Driver/src/utilities/GPIOInterface.cpp
index f4e2d34..298a5d4 100644
--- a/FlippR-Driver/src/utilities/GPIOInterface.cpp
+++ b/FlippR-Driver/src/utilities/GPIOInterface.cpp
@@ -27,7 +27,7 @@ void GPIOInterface::write_pin(char address, char data)
 
 bool GPIOInterface::read_pin(char address)
 {
-  return PULLDOWN && digitalRead(address);
+  return PULLDOWN == digitalRead(address);
 }
 
 void GPIOInterface::initialize_output_pin(char address)