Move M999 to cpp

Marlin/src/gcode/control/M999.cpp

@@ -0,0 +1,47 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 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 "../gcode.h"
+
+#include "../../lcd/ultralcd.h" // for lcd_reset_alert_level
+#include "../../Marlin.h"       // for Running
+#include "../queue.h"           // for flush_and_request_resend
+
+/**
+ * M999: Restart after being stopped
+ *
+ * Default behaviour is to flush the serial buffer and request
+ * a resend to the host starting on the last N line received.
+ *
+ * Sending "M999 S1" will resume printing without flushing the
+ * existing command buffer.
+ *
+ */
+void GcodeSuite::M999() {
+  Running = true;
+  lcd_reset_alert_level();
+
+  if (parser.boolval('S')) return;
+
+  // gcode_LastN = Stopped_gcode_LastN;
+  flush_and_request_resend();
+}