From 46c8775542c0ba474c7b2bca7d03beef21b9d4ef Mon Sep 17 00:00:00 2001
From: Victor Oliveira <rhapsodyv@gmail.com>
Date: Wed, 30 Sep 2020 22:14:19 -0300
Subject: [PATCH] Fix Buzzer (pin) init for uninitialized FastIO (#19559)

---
 Marlin/src/MarlinCore.cpp | 5 +++++
 Marlin/src/libs/buzzer.h  | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/MarlinCore.cpp b/Marlin/src/MarlinCore.cpp
index 8a425510c0..672858d05a 100644
--- a/Marlin/src/MarlinCore.cpp
+++ b/Marlin/src/MarlinCore.cpp
@@ -1048,6 +1048,11 @@ void setup() {
   SERIAL_ECHO_MSG("Compiled: " __DATE__);
   SERIAL_ECHO_MSG(STR_FREE_MEMORY, freeMemory(), STR_PLANNER_BUFFER_BYTES, (int)sizeof(block_t) * (BLOCK_BUFFER_SIZE));
 
+  // Init buzzer pin(s)
+  #if USE_BEEPER
+    SETUP_RUN(buzzer.init());
+  #endif
+
   // Set up LEDs early
   #if HAS_COLOR_LEDS
     SETUP_RUN(leds.setup());
diff --git a/Marlin/src/libs/buzzer.h b/Marlin/src/libs/buzzer.h
index 022d94deaf..e901660c87 100644
--- a/Marlin/src/libs/buzzer.h
+++ b/Marlin/src/libs/buzzer.h
@@ -84,9 +84,9 @@
 
     public:
       /**
-       * @brief Class constructor
+       * @brief Init Buzzer
        */
-      Buzzer() {
+      static inline void init() {
         SET_OUTPUT(BEEPER_PIN);
         reset();
       }