From ff7891c0977834f26b29a9edc1a547679a1f4f1e Mon Sep 17 00:00:00 2001
From: Pete Johanson <peter@peterjohanson.com>
Date: Mon, 15 Feb 2021 22:04:19 -0500
Subject: [PATCH] fix(display): Check for display in idle handler.

* Closes #679
---
 app/src/display/main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app/src/display/main.c b/app/src/display/main.c
index 55dd1ce2..b8b4bf5b 100644
--- a/app/src/display/main.c
+++ b/app/src/display/main.c
@@ -38,12 +38,20 @@ void display_timer_cb() { k_work_submit(&display_tick_work); }
 K_TIMER_DEFINE(display_timer, display_timer_cb, NULL);
 
 static void start_display_updates() {
+    if (display == NULL) {
+        return;
+    }
+
     display_blanking_off(display);
 
     k_timer_start(&display_timer, K_MSEC(10), K_MSEC(10));
 }
 
 static void stop_display_updates() {
+    if (display == NULL) {
+        return;
+    }
+
     display_blanking_on(display);
 
     k_timer_stop(&display_timer);