On 11/20/2017 04:09 AM, Chris Albertson wrote:
I just found this other project. It is a g-code interpreter that runs
on RPi3 boards and other ARMs like that.
What is interesting is that it is written in 100% python and they get
very good real time step generation using the standard non-real time
kernel. Yes python step generation and standard Linux
How?
The method is so simple I'm mad at myself for not thinking of it. They
use an ARM DMA channel to copy bits to GPIO. If you set up bits in
RAM correctly the DMA copies them using hardware with zero software
overhead, the bits are clocked with the system crystal clock. Nearly
zero jitter. The method is portable across any ARM A type.
DMA seem an obvious solution. I think the idea could be adapted to MK.
This appears to be new, code put in git hub 2017
https://github.com/Nikolay-Kha/PyCNC
Clever indeed. It would be neat to see a HAL comp using that scheme.
Also, after having spent WAY too much time with interp and task, I've
often wished for a new start. A pure python interpreter would be nice,
especially if written for easy addition of new and subclassing of old G
codes.
John
--
website: http://www.machinekit.io blog: http://blog.machinekit.io github:
https://github.com/machinekit
---
You received this message because you are subscribed to the Google Groups "Machinekit" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
Visit this group at https://groups.google.com/group/machinekit.
For more options, visit https://groups.google.com/d/optout.
