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/usb/CVS/Root	Mon Sep 04 12:05:05 2017 +0000
@@ -0,0 +1,1 @@
+:local:E:/CVSRep