raspigcd2

The G-CODE interpreter for Raspberry Pi 3 (it works on older versions, but untested)

Recent experiments:

Short description

This is the CLI and library G-CODE interpreter that supports acceleration and deceleration, intelligent G-CODE execution for given machine and smooth movements without RT kernel. It accepts subset of G-CODE. Mainly

G0
G1
M3
M5
M17
M18

It also support:

physical buttons
execution pause and resume (with break on the given distance)
configuration in json file
experimental Bezier curve aproximation of path
selection of impulse generation strategy
stable impulses

Execution of gcode

You can execute the gcode using the following command (example)

gcd -c config_file.json -f program.gcd

You can turn off optimization of gcode by adding --raw option. It will treat the gcode without any additional processing, so impossible turns can be performed. In this mode, only G1 and M codes are supported.

Build

Quick start:

mkdir build
cd build
cmake ..
make -j 2 gcd
sudo ./gcd -c ../v4.json -f your_gcode_file.gcd

More info: doc/BUILD.md

Dependency - Catch2

You should install library for tests:

git clone https://github.com/catchorg/Catch2.git
cd Catch2
cmake -Bbuild -H. -DBUILD_TESTING=OFF
sudo cmake --build build/ --target install

Connection

The example connection schematic for stepstics. The configuration file is v3.json. Schematic is as follows:

Coding style

STL style with custom types named with _t as the postfix

Units

Most of units are in SI standard. The velocity and distance, when not marked differently, is presented in mm/s and mm.

General interpretation of Gcodes

M codes marks separate sections of gcode G codes are processed as a whole

This means that this kind of gcode program:

M3
M17
G1Z-1
G1X10
M5
G0Z10
G0X0
G0Z0
M18

will execute as following parts interpreted as separate executions of motor thread:

M3
M17
G1Z-1, G1X10
M5
G0Z10, G0X0, G0Z0
M18

Licensing

AGPL

If you are interested in different (non-exclusive) license, please contact me (author).

Contributing

(this section will be cleared soon)

You can send pull requests and issues. The credits will be yours and the version with merged changes will be on the same license (AGPL). As a contributor you can ask me (pantadeusz) for different license for the code (I don't promise I will give it). I will have the right to license the code with contribution differently (like the RedHat does) for commercial purposes - for example - with custom features.

vumario / raspigcd