M16 - Expected Printer Check (#14924)

Marlin/src/gcode/gcode.cpp

@@ -342,6 +342,10 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 12: M12(); break;                                    // M12: Synchronize and optionally force a CLC set
       #endif
 
+      #if ENABLED(EXPECTED_PRINTER_CHECK)
+        case 16: M16(); break;                                    // M16: Expected printer check
+      #endif
+
       case 17: M17(); break;                                      // M17: Enable all stepper motors
 
       #if ENABLED(SDSUPPORT)

Marlin/src/gcode/gcode.h

@@ -83,6 +83,7 @@
  * M8   - Turn flood coolant ON. (Requires COOLANT_CONTROL)
  * M9   - Turn coolant OFF. (Requires COOLANT_CONTROL)
  * M12  - Set up closed loop control system. (Requires EXTERNAL_CLOSED_LOOP_CONTROLLER)
+ * M16  - Expected printer check. (Requires EXPECTED_PRINTER_CHECK)
  * M17  - Enable/Power all stepper motors
  * M18  - Disable all stepper motors; same as M84
  * M20  - List SD card. (Requires SDSUPPORT)
@@ -472,6 +473,10 @@ private:
     static void M12();
   #endif
 
+  #if ENABLED(EXPECTED_PRINTER_CHECK)
+    static void M16();
+  #endif
+
   static void M17();
 
   static void M18_M84();

Marlin/src/gcode/host/M16.cpp

@@ -0,0 +1,40 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(EXPECTED_PRINTER_CHECK)
+
+#include "../gcode.h"
+#include "../../Marlin.h"
+
+/**
+ * M16: Expected Printer Check
+ */
+void GcodeSuite::M16() {
+
+  if (strcmp_P(parser.string_arg, PSTR(MACHINE_NAME)))
+    kill(PSTR(MSG_EXPECTED_PRINTER));
+
+}
+
+#endif

Marlin/src/gcode/parser.cpp

@@ -225,6 +225,9 @@ void GCodeParser::parse(char *p) {
       case 810: case 811: case 812: case 813: case 814:
       case 815: case 816: case 817: case 818: case 819:
     #endif
+    #if ENABLED(EXPECTED_PRINTER_CHECK)
+      case 16:
+    #endif
     case 23: case 28: case 30: case 117: case 118: case 928: string_arg = p; return;
     default: break;
   }