From 7d59a758dacae6e576b41daf4c98fbf673afcf00 Mon Sep 17 00:00:00 2001
From: Michal Moskal <michal@moskal.me>
Date: Mon, 9 Mar 2020 20:37:44 -0700
Subject: [PATCH] Make sure all pins are in reset state on teardown

---
 src/boards.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/boards.c b/src/boards.c
index 3b03081..33ca2fe 100644
--- a/src/boards.c
+++ b/src/boards.c
@@ -115,6 +115,13 @@ void board_teardown(void)
 
   // Stop LF clock
   NRF_CLOCK->TASKS_LFCLKSTOP = 1UL;
+
+  // make sure all pins are back in reset state
+  for (int i = 0; i < 32; ++i)
+  {
+    NRF_P0->PIN_CNF[i] = 2;
+    NRF_P1->PIN_CNF[i] = 2;
+  }
 }
 
 static uint32_t _systick_count = 0;