Import grbl v1.1h
diff --git a/grbl/jog.h b/grbl/jog.h
new file mode 100644
index 0000000..c726246
--- /dev/null
+++ b/grbl/jog.h
@@ -0,0 +1,32 @@
+/*
+ jog.h - Jogging methods
+ Part of Grbl
+
+ Copyright (c) 2016 Sungeun K. Jeon for Gnea Research LLC
+
+ Grbl 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.
+
+ Grbl 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 Grbl. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef jog_h
+#define jog_h
+
+#include "gcode.h"
+
+// System motion line numbers must be zero.
+#define JOG_LINE_NUMBER 0
+
+// Sets up valid jog motion received from g-code parser, checks for soft-limits, and executes the jog.
+uint8_t jog_execute(plan_line_data_t *pl_data, parser_block_t *gc_block);
+
+#endif