From c4f3f67537c65c446cdc8ecf3a46a7a7a32211de Mon Sep 17 00:00:00 2001
From: Scott Lahteine <thinkyhead@users.noreply.github.com>
Date: Sun, 25 Oct 2020 04:19:51 -0500
Subject: [PATCH] Followup for BTN_ENC_EN

---
 Marlin/src/lcd/marlinui.cpp | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Marlin/src/lcd/marlinui.cpp b/Marlin/src/lcd/marlinui.cpp
index 9c456c25c9..0a87965721 100644
--- a/Marlin/src/lcd/marlinui.cpp
+++ b/Marlin/src/lcd/marlinui.cpp
@@ -808,6 +808,14 @@ millis_t next_lcd_update_ms;
   millis_t MarlinUI::return_to_status_ms = 0;
 #endif
 
+inline bool can_encode() {
+  #if BUTTON_EXISTS(ENC_EN)
+    return !BUTTON_PRESSED(ENC_EN);  // Update position only when ENC_EN is HIGH
+  #else
+    return true;
+  #endif
+}
+
 void MarlinUI::update() {
 
   static uint16_t max_display_update_time = 0;
@@ -961,9 +969,7 @@ void MarlinUI::update() {
 
           #endif // ENCODER_RATE_MULTIPLIER
 
-          // Update position only when ENC_EN is HIGH
-          if (TERN1(BTN_ENC_EN, !BUTTON_PRESSED(ENC_EN)))
-            encoderPosition += (encoderDiff * encoderMultiplier) / epps;
+          if (can_encode()) encoderPosition += (encoderDiff * encoderMultiplier) / epps;
 
           encoderDiff = 0;
         }
@@ -1182,8 +1188,7 @@ void MarlinUI::update() {
             if (BUTTON_PRESSED(EN2)) newbutton |= EN_B;
           #endif
           #if BUTTON_EXISTS(ENC)
-            // Update button only when ENC_EN is HIGH
-            if (TERN1(BTN_ENC_EN, !BUTTON_PRESSED(ENC_EN)) && BUTTON_PRESSED(ENC)) newbutton |= EN_C;
+            if (can_encode() && BUTTON_PRESSED(ENC)) newbutton |= EN_C;
           #endif
           #if BUTTON_EXISTS(BACK)
             if (BUTTON_PRESSED(BACK)) newbutton |= EN_D;