From e7247ebf69590af87a26d1cff52d4725b41e25cf Mon Sep 17 00:00:00 2001
From: ellensp <530024+ellensp@users.noreply.github.com>
Date: Mon, 12 Dec 2022 19:35:02 +1300
Subject: [PATCH] add BOARD_K8400 BLTOUCH special case

---
 Marlin/src/inc/Conditionals_LCD.h | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/Marlin/src/inc/Conditionals_LCD.h b/Marlin/src/inc/Conditionals_LCD.h
index c1b43d2fc0c6..89f16cf55817 100644
--- a/Marlin/src/inc/Conditionals_LCD.h
+++ b/Marlin/src/inc/Conditionals_LCD.h
@@ -1073,13 +1073,25 @@
   #endif
 
   // Always disable probe pin inverting for BLTouch
-  #if Z_MIN_PROBE_ENDSTOP_INVERTING
-    #error "BLTOUCH requires Z_MIN_PROBE_ENDSTOP_INVERTING set to false. Please update your Configuration.h file."
+  #if !MB(K8400)
+    #if Z_MIN_PROBE_ENDSTOP_INVERTING
+      #error "BLTOUCH requires Z_MIN_PROBE_ENDSTOP_INVERTING set to false. Please update your Configuration.h file."
+    #endif
+  #elif // Special case for BOARD_K8400
+    #if !Z_MIN_PROBE_ENDSTOP_INVERTING
+      #error "BLTOUCH requires Z_MIN_PROBE_ENDSTOP_INVERTING set to true. Please update your Configuration.h file."
+    #endif
   #endif
 
   #if ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN)
-    #if Z_MIN_ENDSTOP_INVERTING
-      #error "BLTOUCH requires Z_MIN_ENDSTOP_INVERTING set to false. Please update your Configuration.h file."
+    #if !MB(K8400)
+      #if Z_MIN_ENDSTOP_INVERTING
+        #error "BLTOUCH requires Z_MIN_ENDSTOP_INVERTING set to false. Please update your Configuration.h file."
+      #endif
+    #else // Special case for BOARD_K8400, Endstops are electronically inverted
+      #if !Z_MIN_ENDSTOP_INVERTING
+        #error "BLTOUCH requires Z_MIN_ENDSTOP_INVERTING set to true. Please update your Configuration.h file."
+      #endif
     #endif
   #endif
 #endif