GCodeFirmware

A modular and adaptable firmware for CNC routers.

This project was designed by Andrew Gerber and Erik Neilson for the course ECE 3710 Microcontroller Hardware and Software taught by Dr. Jonathan Phillips at Utah State University fall semester 2021.

The full report can be found at https://github.com/gerberprototyping/GCodeFirmware/wiki

A video presentation is available at https://www.youtube.com/watch?v=GPX9U4xJiTs&t=1s

G-Code Commands

Command	Description	Usage	Arguments
G0 & G1	Linear movement	G0 [X<n>] [Y<n>] [Z<n>] [F<n>]	XYZ values and feedrate
G28	Home	G28 [X] [Y] [Z]	Select which axis to home (default: all)
G90	Absolute positioning mode (default)	G90	no arguments
G91	Relative positioning mode	G91	no arguments
G92	Set workspace origin	G92 [X<n>] [Y<n>] [Z<n>]	Machine coordinate for workspace origin (default: current location)
G92.1	Use native machine coordinates	G92.1	no arguments
M111	Set debug level	M111 D<n>	D0 : echo off; D1 : echo on (default)

ToDo

• Z homing
• System stalls when using cnc-link
• Z probing
• G92 wait to change origin until previous moves are complete
• Check G28 and G82 with no arguments
• cnc-link
  • terminal mode
  • abort command

Command	Description
G4	Dwell
G29	Bed leveling (3-Point)
G30	Z-Probe at current XY location
G53	Move in machine coordinates
M0 & M1	Stop and wait for user
M3 & M4	Tool on
M5	Tool off
M6	Tool change
M10	Vacuum on
M11	Vacuum off
M17	Enable steppers
M18 & M84	Disable steppers
M31	Report print time
M75	Start job timer
M76	Pause job timer
M77	Stop job timer
M78	Job stats
M80	Power on (ATX)
M81	Power off (ATX)
M112	Emergency Stop
M114	Get current position
M117	Display message
M119	End stop states
M211	Report software end stops
M300	Play tone
M355	Light On/Off
M400	Wait for current moves to finish
M410	Quick stop
M420	Get/set bed leveling

This implementation is for the Nucleo-L476RG.