From f7e797bfde7d58a970f13a8e809c6a333311baca Mon Sep 17 00:00:00 2001
From: ellensp <530024+ellensp@users.noreply.github.com>
Date: Wed, 19 Apr 2023 21:06:47 +1200
Subject: [PATCH] restore extruding without hotend

---
 Marlin/src/gcode/gcode.cpp          | 2 +-
 Marlin/src/gcode/gcode.h            | 2 +-
 Marlin/src/gcode/temp/M104_M109.cpp | 4 ++--
 Marlin/src/inc/Conditionals_LCD.h   | 6 +++++-
 Marlin/src/inc/Conditionals_adv.h   | 6 ++++++
 Marlin/src/inc/SanityCheck.h        | 8 ++++----
 6 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/Marlin/src/gcode/gcode.cpp b/Marlin/src/gcode/gcode.cpp
index 0711d39204f2..9d1014e8bfb6 100644
--- a/Marlin/src/gcode/gcode.cpp
+++ b/Marlin/src/gcode/gcode.cpp
@@ -581,7 +581,7 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 102: M102(); break;                                  // M102: Configure Bed Distance Sensor
       #endif
 
-      #if HAS_EXTRUDERS
+      #if HAS_HOTEND
         case 104: M104(); break;                                  // M104: Set hot end temperature
         case 109: M109(); break;                                  // M109: Wait for hotend temperature to reach target
       #endif
diff --git a/Marlin/src/gcode/gcode.h b/Marlin/src/gcode/gcode.h
index 8493d7f2911d..d49c544623ba 100644
--- a/Marlin/src/gcode/gcode.h
+++ b/Marlin/src/gcode/gcode.h
@@ -716,7 +716,7 @@ class GcodeSuite {
     static void M102_report(const bool forReplay=true);
   #endif
 
-  #if HAS_EXTRUDERS
+  #if HAS_HOTEND
     static void M104_M109(const bool isM109);
     FORCE_INLINE static void M104() { M104_M109(false); }
     FORCE_INLINE static void M109() { M104_M109(true); }
diff --git a/Marlin/src/gcode/temp/M104_M109.cpp b/Marlin/src/gcode/temp/M104_M109.cpp
index 331ceeb61db1..3a4f61bbea6f 100644
--- a/Marlin/src/gcode/temp/M104_M109.cpp
+++ b/Marlin/src/gcode/temp/M104_M109.cpp
@@ -28,7 +28,7 @@
 
 #include "../../inc/MarlinConfigPre.h"
 
-#if HAS_EXTRUDERS
+#if HAS_HOTEND
 
 #include "../gcode.h"
 #include "../../module/temperature.h"
@@ -135,4 +135,4 @@ void GcodeSuite::M104_M109(const bool isM109) {
     (void)thermalManager.wait_for_hotend(target_extruder, no_wait_for_cooling);
 }
 
-#endif // EXTRUDERS
+#endif // HOTEND
diff --git a/Marlin/src/inc/Conditionals_LCD.h b/Marlin/src/inc/Conditionals_LCD.h
index 60bc65356004..898a75e235e1 100644
--- a/Marlin/src/inc/Conditionals_LCD.h
+++ b/Marlin/src/inc/Conditionals_LCD.h
@@ -694,7 +694,11 @@
 #endif
 
 #ifndef HOTENDS
-  #define HOTENDS EXTRUDERS
+  #if TEMP_SENSOR_0 == 0
+    #define HOTENDS 0
+  #else
+    #define HOTENDS EXTRUDERS
+  #endif
 #endif
 #ifndef E_STEPPERS
   #define E_STEPPERS EXTRUDERS
diff --git a/Marlin/src/inc/Conditionals_adv.h b/Marlin/src/inc/Conditionals_adv.h
index 3a3daa84acf4..880a8698b3e2 100644
--- a/Marlin/src/inc/Conditionals_adv.h
+++ b/Marlin/src/inc/Conditionals_adv.h
@@ -334,6 +334,12 @@
 #else
   #undef HEATER_0_MINTEMP
   #undef HEATER_0_MAXTEMP
+  #undef THERMAL_PROTECTION_HOTENDS
+  #undef THERMAL_PROTECTION_PERIOD
+  #undef WATCH_TEMP_PERIOD
+  #undef PREVENT_COLD_EXTRUSION
+  #undef PIDTEMP
+  #undef AUTOTEMP
 #endif
 
 #if TEMP_SENSOR_IS_MAX_TC(1)
diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 8a3e0a6cda21..daeed6a9c004 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -2629,9 +2629,9 @@ static_assert(X_MAX_LENGTH >= X_BED_SIZE, "Movement bounds (X_MIN_POS, X_MAX_POS
  * Test Sensor & Heater pin combos.
  * Pins and Sensor IDs must be set for each heater
  */
-#if HAS_EXTRUDERS && !ANY_PIN(TEMP_0, TEMP_0_CS)
+#if HAS_HOTEND && !ANY_PIN(TEMP_0, TEMP_0_CS)
   #error "TEMP_0_PIN or TEMP_0_CS_PIN not defined for this board."
-#elif HAS_EXTRUDERS && !HAS_HEATER_0
+#elif HAS_HOTEND && !HAS_HEATER_0
   #error "HEATER_0_PIN not defined for this board."
 #elif TEMP_SENSOR_IS_MAX_TC(0) && !PIN_EXISTS(TEMP_0_CS)
   #error "TEMP_SENSOR_0 MAX thermocouple requires TEMP_0_CS_PIN."
@@ -2834,8 +2834,8 @@ static_assert(X_MAX_LENGTH >= X_BED_SIZE, "Movement bounds (X_MIN_POS, X_MAX_POS
     #error "E0_STEP_PIN or E0_DIR_PIN not defined for this board."
   #elif ( !(defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__)) && (!PINS_EXIST(E0_STEP, E0_DIR) || !HAS_E0_ENABLE))
     #error "E0_STEP_PIN, E0_DIR_PIN, or E0_ENABLE_PIN not defined for this board."
-  #elif EXTRUDERS && TEMP_SENSOR_0 == 0
-    #error "TEMP_SENSOR_0 is required if there are any extruders."
+  #elif HOTENDS && TEMP_SENSOR_0 == 0
+    #error "TEMP_SENSOR_0 is required if there are any hotends."
   #endif
 #endif