I'm trying to port GRBL 1.1 to the STM32F746 chip. Tell me the solution, thanks.

Revision:
0:9dcf85d9b2f3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/grbl/jog.h	Mon Sep 04 12:05:05 2017 +0000
@@ -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