1 files changed, 39 insertions, 0 deletions
diff --git a/Marlin/src/gcode/units/G20_G21.cpp b/Marlin/src/gcode/units/G20_G21.cpp
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+++ b/Marlin/src/gcode/units/G20_G21.cpp
@@ -0,0 +1,39 @@
+/**
+ * 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 ENABLED(INCH_MODE_SUPPORT)
+
+#include "../gcode.h"
+
+/**
+ * G20: Set input mode to inches
+ */
+void GcodeSuite::G20() { parser.set_input_linear_units(LINEARUNIT_INCH); }
+
+/**
+ * G21: Set input mode to millimeters
+ */
+void GcodeSuite::G21() { parser.set_input_linear_units(LINEARUNIT_MM); }
+
+#endif // INCH_MODE_SUPPORT