Add Anycubic 0.0.2 debug feature

Marlin/src/gcode/anycubic_tft_debug/M9999.cpp

@@ -0,0 +1,40 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if BOTH(ANYCUBIC_TFT_DEBUG, KNUTWURST_DGUS2_TFT)
+
+#include "../../lcd/anycubic_touchscreen.h"
+#include "../gcode.h"
+
+void GcodeSuite::M9999() {
+    size_t len = strlen(parser.string_arg);
+    if (len > 2 && parser.string_arg[0] == 34) {
+        char cmd[30];
+        strncpy(cmd, parser.string_arg + 1, min(len - 2, 30));
+        cmd[len - 2] = 0;
+        AnycubicTouchscreen.Command(cmd);
+    }
+}
+
+#endif

Marlin/src/gcode/feature/pause/M600.cpp

@@ -76,7 +76,7 @@ void GcodeSuite::M600() {
         if (AnycubicTouchscreen.ai3m_pause_state < 2) {
           AnycubicTouchscreen.ai3m_pause_state = 2;
           #ifdef ANYCUBIC_TFT_DEBUG
-            SERIAL_ECHOPAIR(" DEBUG: M600 - AI3M Pause State set to: ", AnycubicTouchscreen.ai3m_pause_state);
+            SERIAL_ECHOPGM(" DEBUG: M600 - AI3M Pause State set to: ", AnycubicTouchscreen.ai3m_pause_state);
             SERIAL_EOL();
           #endif
         }

Marlin/src/gcode/gcode.cpp

@@ -1040,6 +1040,10 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 7219: M7219(); break;                                // M7219: Set LEDs, columns, and rows
       #endif
 
+      #if BOTH(ANYCUBIC_TFT_DEBUG, KNUTWURST_DGUS2_TFT)
+         case 9999: M9999(); break;
+      #endif
+
       default: parser.unknown_command_warning(); break;
     }
     break;

Marlin/src/gcode/gcode.h

@@ -1187,6 +1187,10 @@ private:
     static void M710_report(const bool forReplay=true);
   #endif
 
+  #if BOTH(ANYCUBIC_TFT_DEBUG, KNUTWURST_DGUS2_TFT)
+     static void M9999();
+  #endif
+
   static void T(const int8_t tool_index);
 
 };