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Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
- smv
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07 Aug 2025 06:52 #332989
by smv
Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC was created by smv
Hi everyone!
I’ve recently been working on integrating g-code++ (a lightweight g-code interpreter inspired by the rs274ngc NIST g-code specification) into the LinuxCNC ecosystem. Before I submit a pull request, I’d like to get some community feedback so as to ensure that it fits well and is aligned with the project's direction.
Link to my original repo: github.com/s-mv/gcode-plus-plus
Link to the LinuxCNC fork: github.com/s-mv/linuxcnc/tree/s-mv/sterp (s-mv/sterp branch)
Demo video: What I’ve Done
Best regards,
s-mv (Shreerang Vaidya)
Link to my original repo: github.com/s-mv/gcode-plus-plus
Link to the LinuxCNC fork: github.com/s-mv/linuxcnc/tree/s-mv/sterp (s-mv/sterp branch)
Demo video: What I’ve Done
- Integrated g-code++ into the LinuxCNC environment.
- Verified it works for 3-axis machines on LinuxCNC.
- Documented the integration process and architecture.
- Set up an ANTLR4-based parser for g-code interpretation.
- Control flow: Support for
loops,
while
loops,for
statements, imports,if
, andcontinue
break.
- g-code compatibility: Supports standard G-codes like G0, G1, G2, G3, G20, G21, G54, M3, M4, etc.
Best regards,
s-mv (Shreerang Vaidya)
The following user(s) said Thank You: tommylight
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- andypugh
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08 Aug 2025 18:56 #333055
by andypugh
Replied by andypugh on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
Does this exist as an alternative plug-in interpreter for LinuxCNC?
LinuxCNC already supports this, though the only alternative that currently exists is called canterp and just passes canonincal commands straight through.
I don't know how much traction you will get with a new G-code dialect, not even well-supported alternatives to G-code like STEP-NC have made much of a dent.
If it's a plug-in interpreter for existing LinuxCNC then I would support it's inclusion in principle.
Are you committed to supporting it for the next 20 years or so?
LinuxCNC already supports this, though the only alternative that currently exists is called canterp and just passes canonincal commands straight through.
I don't know how much traction you will get with a new G-code dialect, not even well-supported alternatives to G-code like STEP-NC have made much of a dent.
If it's a plug-in interpreter for existing LinuxCNC then I would support it's inclusion in principle.
Are you committed to supporting it for the next 20 years or so?
The following user(s) said Thank You: smv
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- pippin88
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09 Aug 2025 01:18 #333088
by pippin88
Replied by pippin88 on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
Please tell us the advantages of gcode++
The following user(s) said Thank You: smv
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- smv
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12 Aug 2025 14:18 #333278
by smv
Replied by smv on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
Right now gcode++ extends g-code by introducing for loops, while/do-while loops, as well as imports (currently working on test cases for the same for the latest LinuxCNC release).
The inclusion of these control structures and import statements could greatly improve readability and code reusability.
It also ships with an in-house REPL for dry-running programs that can be used outside of LinuxCNC and has richer logging - I intend to add a simple debugger to it possibly in the future.
The inclusion of these control structures and import statements could greatly improve readability and code reusability.
It also ships with an in-house REPL for dry-running programs that can be used outside of LinuxCNC and has richer logging - I intend to add a simple debugger to it possibly in the future.
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- smv
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12 Aug 2025 14:40 #333279
by smv
Replied by smv on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
Thanks a lot for reaching out!
Yes, in the current fork, it lives under src/emc/sterp as a plug-in interpreter.
In fact, I modeled it after studying how canterp works.
I understand that it might not gain much traction.
I'd love to maintain and extend the project as long as life permits me! Currently, I’m just an undergraduate, so I can’t promise a fixed 20-year roadmap just yet, but I've built sterp/gcode++ with maintainability in mind.
I might also extend it in the near future and add more preliminary unit tests.
Yes, in the current fork, it lives under src/emc/sterp as a plug-in interpreter.
In fact, I modeled it after studying how canterp works.
I understand that it might not gain much traction.
I'd love to maintain and extend the project as long as life permits me! Currently, I’m just an undergraduate, so I can’t promise a fixed 20-year roadmap just yet, but I've built sterp/gcode++ with maintainability in mind.
I might also extend it in the near future and add more preliminary unit tests.
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- andypugh
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19 Aug 2025 12:41 #333671
by andypugh
linuxcnc.org/docs/stable/html/gcode/o-code.html
Replied by andypugh on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
You know that LinuxCNC G-code already has do/while loops?Right now gcode++ extends g-code by introducing for loops, while/do-while loops, as well as imports (currently working on test cases for the same for the latest LinuxCNC release).
linuxcnc.org/docs/stable/html/gcode/o-code.html
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- cmorley
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20 Aug 2025 03:28 #333710
by cmorley
Replied by cmorley on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
What do you mean "imports" ?
I would think that a more modern approach to parsing could be a good thing to get more people interested in working on the code.
Chris
I would think that a more modern approach to parsing could be a good thing to get more people interested in working on the code.
Chris
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- Grotius
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21 Aug 2025 08:27 - 21 Aug 2025 09:06 #333751
by Grotius
Replied by Grotius on topic Request for Community Feedback on g-code++ (sterp) Integration with LinuxCNC
In the source i see you how you handle expressions.
I shoukd use a lib like: mu parser to handle expressions.
This also handles and updates gcode variables for you.
It wont run (nested) while loops. This while loop algo you can design yourself.
in future i love to see gcode dialect parsing,
given a json config file.
Then hopely the interpreter is also able to read fanuc and kuka robot language and produce the motion outputs for it. An extended version off straight_feed xyz...
would look like straigt_feed j1 j2 ....
Mu parser example
I shoukd use a lib like: mu parser to handle expressions.
This also handles and updates gcode variables for you.
It wont run (nested) while loops. This while loop algo you can design yourself.
in future i love to see gcode dialect parsing,
given a json config file.
Then hopely the interpreter is also able to read fanuc and kuka robot language and produce the motion outputs for it. An extended version off straight_feed xyz...
would look like straigt_feed j1 j2 ....
Mu parser example
Last edit: 21 Aug 2025 09:06 by Grotius.
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