From f5f09f147c557e9c08329d6ae097844f3c11d020 Mon Sep 17 00:00:00 2001
From: Alex Voinea <voinea.dragos.alexandru@gmail.com>
Date: Sat, 13 May 2023 22:03:34 +0200
Subject: [PATCH] Add a limit to how many times G80 can fail

Flash: +80
SRAM: +1
---
 Firmware/Marlin_main.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index d15ab8a8f..34de07b70 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -2970,7 +2970,11 @@ static void gcode_G80()
     current_position[Z_AXIS] = MESH_HOME_Z_SEARCH;
     plan_buffer_line_curposXYZE(Z_LIFT_FEEDRATE);
     st_synchronize();
+    static uint8_t g80_fail_cnt = 0;
     if (mesh_point != MESH_NUM_X_POINTS * MESH_NUM_Y_POINTS) {
+        if (g80_fail_cnt++ >= 2) {
+            kill(_i("Mesh bed leveling failed. Please run Z calibration"));
+        }
         Sound_MakeSound(e_SOUND_TYPE_StandardAlert);
         bool bState;
         do   {                             // repeat until Z-leveling o.k.
@@ -3005,6 +3009,8 @@ static void gcode_G80()
         repeatcommand_front();             // re-run (i.e. of "G80")
         return;
     }
+    g80_fail_cnt = 0; // no fail was detected. Reset the error counter.
+
     clean_up_after_endstop_move(l_feedmultiply);
 
 #ifndef PINDA_THERMISTOR