From 777d189cc5cd2f40b696877be1fa6edfa35ce43d Mon Sep 17 00:00:00 2001
From: Neil McKechnie <neilmck999@gmail.com>
Date: Tue, 24 Aug 2021 22:15:50 +0100
Subject: [PATCH] Enable pullups for Arduino input pins as a default

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

diff --git a/IODevice.cpp b/IODevice.cpp
index f151923..e7b9dbd 100644
--- a/IODevice.cpp
+++ b/IODevice.cpp
@@ -292,7 +292,7 @@ ArduinoPins::ArduinoPins(VPIN firstVpin, int nPins) {
   _pinPullups = (uint8_t *)calloc(2, arrayLen);
   _pinModes = (&_pinPullups[0]) + arrayLen;
   for (int i=0; i<arrayLen; i++) {
-    _pinPullups[i] = -1;
+    _pinPullups[i] = 0xff;  // default to pullup on, for inputs
     _pinModes[i] = 0;
   }
 }