From ba0488d69ab7eea0c32d58c871024f59cd163e3b Mon Sep 17 00:00:00 2001
From: Sandeep Mistry <s.mistry@arduino.cc>
Date: Thu, 21 Jan 2016 14:13:09 -0500
Subject: [PATCH] Disable pull-ups on pinMode OUTPUT
---
cores/arduino/wiring_digital.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/cores/arduino/wiring_digital.c b/cores/arduino/wiring_digital.c
index 38d5d23e..966d72bd 100644
--- a/cores/arduino/wiring_digital.c
+++ b/cores/arduino/wiring_digital.c
@@ -61,6 +61,9 @@ void pinMode( uint32_t ulPin, uint32_t ulMode )
// enable input, to support reading back values
PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].bit.INEN = 1 ;
+ // disable pullups
+ PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].bit.PULLEN = 0 ;
+
// Set pin to output mode
PORT->Group[g_APinDescription[ulPin].ulPort].DIRSET.reg = (uint32_t)(1<<g_APinDescription[ulPin].ulPin) ;
break ;
--
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