Arduino GCode Interpreter for Adafruits Motor Shield Version 2

Based on GcodeCNCDemo by Dan Royer at MarginallyClever. You can find his great works on https://github.com/MarginallyClever/ and https://www.marginallyclever.com

What i have done:

• Remove the compatibility with Adafruids Motor Shield Version 1
• Split the functions into files.
• Add a new G-Command (G28 - do homing)
• Add support for limit switches (X-Home, X-End, Y-Home, Y-End)
• steps/[mm | in] translator
• send actual position to PC-Software (see https://github.com/hirnwunde/hwCNC)
• Soft limit switch (don't leave your defined working space)

• add support for manual movement of X & Y (four buttons, maybe a fifth for fast move)
• add servo for Z
• add button for homing (must be pressed 3sec)
• add option for more HardwareEndSwitches (0 = no switches, 1 = Home- and End-Switches, 2 = only Home-Switches, 3 = only End-Switches)

You can send commands to GCodeAFMotorV2 over Serial or with PC-Software hwCNC (see https://github.com/hirnwunde/hwCNC)