grbl
github.com/Schildkroet/GRBL-Advanced
github.com/usbcnc/grbl
github.com/dungjk/grbl-stm32
Marlin
github.com/MarlinFirmware/Marlin
github.com/Rejdok/STM32-Marlin-Port (old?)
github.com/MakerLabMe/Marlin_STM32 (old?)
Super Gerbil, the STM32 based Gcode controller
STM32 grbl
GRBL STM32duino?
G-Code
Marlin G-code Index
G Codes
G0 vs G1 Gcode
ST
STEVAL-3DP001V1: Reference design for FDM 3D printing
UM2067 User manual: Getting started with the 3D printer board
STEVAL-3DP001V1: Plug-n-play solution for 3D printers
YouTube
Basic Movements with G-Code
3d Printers G-Code Explored and Explained with Examples
Creating a custom GCODE command – Extending Marlin Firmware
Original AVR
github.com/grbl/grbl
github.com/gnea/grbl/wiki
ARM discussion #67