From c400c54b86d8f55850518dac12f748e62f795db4 Mon Sep 17 00:00:00 2001
From: Jason Smith <jason.inet@gmail.com>
Date: Fri, 4 Dec 2020 22:02:58 -0800
Subject: [PATCH] Suspend Servos for STM32+NeoPixel (#19963)

---
 Marlin/src/HAL/STM32/HAL.h             |  3 +++
 Marlin/src/HAL/STM32/eeprom_flash.cpp  | 17 ++++-------------
 Marlin/src/feature/leds/neopixel.h     |  3 +++
 Marlin/src/inc/Conditionals_post.h     |  3 +++
 buildroot/tests/BIGTREE_GTR_V1_0-tests |  3 ++-
 5 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/Marlin/src/HAL/STM32/HAL.h b/Marlin/src/HAL/STM32/HAL.h
index 16dc7a4539..9842cdaae4 100644
--- a/Marlin/src/HAL/STM32/HAL.h
+++ b/Marlin/src/HAL/STM32/HAL.h
@@ -29,6 +29,7 @@
 #include "../shared/math_32bit.h"
 #include "../shared/HAL_SPI.h"
 #include "fastio.h"
+#include "Servo.h"
 #include "watchdog.h"
 #include "MarlinSerial.h"
 
@@ -110,6 +111,8 @@
 typedef int16_t pin_t;
 
 #define HAL_SERVO_LIB libServo
+#define PAUSE_SERVO_OUTPUT() libServo::pause_all_servos()
+#define RESUME_SERVO_OUTPUT() libServo::resume_all_servos()
 
 // ------------------------
 // Public Variables
diff --git a/Marlin/src/HAL/STM32/eeprom_flash.cpp b/Marlin/src/HAL/STM32/eeprom_flash.cpp
index 702e42e561..8cd62879a5 100644
--- a/Marlin/src/HAL/STM32/eeprom_flash.cpp
+++ b/Marlin/src/HAL/STM32/eeprom_flash.cpp
@@ -28,15 +28,6 @@
 
 #include "../shared/eeprom_api.h"
 
-#if HAS_SERVOS
-  #include "Servo.h"
-  #define PAUSE_SERVO_OUTPUT() libServo::pause_all_servos()
-  #define RESUME_SERVO_OUTPUT() libServo::resume_all_servos()
-#else
-  #define PAUSE_SERVO_OUTPUT()
-  #define RESUME_SERVO_OUTPUT()
-#endif
-
 /**
  * The STM32 HAL supports chips that deal with "pages" and some with "sectors" and some that
  * even have multiple "banks" of flash.
@@ -172,11 +163,11 @@ bool PersistentStore::access_finish() {
         current_slot = EEPROM_SLOTS - 1;
         UNLOCK_FLASH();
 
-        PAUSE_SERVO_OUTPUT();
+        TERN_(HAS_PAUSE_SERVO_OUTPUT, PAUSE_SERVO_OUTPUT());
         DISABLE_ISRS();
         status = HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError);
         ENABLE_ISRS();
-        RESUME_SERVO_OUTPUT();
+        TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT());
         if (status != HAL_OK) {
           DEBUG_ECHOLNPAIR("HAL_FLASHEx_Erase=", status);
           DEBUG_ECHOLNPAIR("GetError=", HAL_FLASH_GetError());
@@ -227,11 +218,11 @@ bool PersistentStore::access_finish() {
       // Interrupts during this time can have unpredictable results, such as killing Servo
       // output. Servo output still glitches with interrupts disabled, but recovers after the
       // erase.
-      PAUSE_SERVO_OUTPUT();
+      TERN_(HAS_PAUSE_SERVO_OUTPUT, PAUSE_SERVO_OUTPUT());
       DISABLE_ISRS();
       eeprom_buffer_flush();
       ENABLE_ISRS();
-      RESUME_SERVO_OUTPUT();
+      TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT());
 
       eeprom_data_written = false;
     #endif
diff --git a/Marlin/src/feature/leds/neopixel.h b/Marlin/src/feature/leds/neopixel.h
index d7354207fc..acf2e7f54d 100644
--- a/Marlin/src/feature/leds/neopixel.h
+++ b/Marlin/src/feature/leds/neopixel.h
@@ -105,6 +105,8 @@ public:
   }
 
   static inline void show() {
+    // Some platforms cannot maintain PWM output when NeoPixel disables interrupts for long durations.
+    TERN_(HAS_PAUSE_SERVO_OUTPUT, PAUSE_SERVO_OUTPUT());
     adaneo1.show();
     #if PIN_EXISTS(NEOPIXEL2)
       #if CONJOINED_NEOPIXEL
@@ -115,6 +117,7 @@ public:
         adaneo1.setPin(NEOPIXEL_PIN);
       #endif
     #endif
+    TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT());
   }
 
   #if 0
diff --git a/Marlin/src/inc/Conditionals_post.h b/Marlin/src/inc/Conditionals_post.h
index dfecd57749..092dc818b8 100644
--- a/Marlin/src/inc/Conditionals_post.h
+++ b/Marlin/src/inc/Conditionals_post.h
@@ -1997,6 +1997,9 @@
 #if NUM_SERVOS > 0
   #define HAS_SERVOS 1
 #endif
+#if HAS_SERVOS && defined(PAUSE_SERVO_OUTPUT) && defined(RESUME_SERVO_OUTPUT)
+  #define HAS_PAUSE_SERVO_OUTPUT 1
+#endif
 
 // Sensors
 #if PIN_EXISTS(FILWIDTH)
diff --git a/buildroot/tests/BIGTREE_GTR_V1_0-tests b/buildroot/tests/BIGTREE_GTR_V1_0-tests
index ef245143a8..adc850db03 100644
--- a/buildroot/tests/BIGTREE_GTR_V1_0-tests
+++ b/buildroot/tests/BIGTREE_GTR_V1_0-tests
@@ -23,7 +23,8 @@ opt_set E1_AUTO_FAN_PIN PC11
 opt_set E2_AUTO_FAN_PIN PC12
 opt_set X_DRIVER_TYPE TMC2208
 opt_set Y_DRIVER_TYPE TMC2130
-opt_enable REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
+opt_set NEOPIXEL_PIN PF13
+opt_enable REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER BLTOUCH NEOPIXEL_LED Z_SAFE_HOMING
 opt_enable FILAMENT_RUNOUT_SENSOR NOZZLE_PARK_FEATURE ADVANCED_PAUSE_FEATURE
 opt_set FIL_RUNOUT_PIN 3
 opt_set FIL_RUNOUT2_PIN 4