LinuxCNC + Orange Pi (allwincnc)

mwidlok wrote: Thanks MX_Master.
Anyway while I understand (more or less) how the driver + arisc firmware works I am completely missing place where the arisc firmware is loaded to the processor. Could You please explain it a bit? I think that I might be able to help with some minor bugs if You want.

A simple u-boot script (for H3) uploads the firmware to the target SRAM address and starts the ARISC core via special register

github.com/allwincnc/installer/blob/mast...bian/fw/h3/fixup.cmd

This trick works only for H3. The H5 needs a kernel module to upload and start the ARISC core. And none of these tricks works for H6 H6 needs another secure method of memory editing

3D printer board leverages Allwinner A64’s AR100 core for real-time control
www.cnx-software.com/2021/06/05/3d-print...r-real-time-control/

github.com/intelligent-agent/Recore

github.com/intelligent-agent/Refactor

wiki.iagent.no/wiki/Recore

www.iagent.no/2021/06/04/recore-is-finally-printing/

We can "fix" their project to run LinuxCNC on the A64

I have a hard time accepting that they spent two years just to run Octoprint and Klipper on this vs LCNC. Why?

Doogie wrote: Did you guys see the Recore project which uses an Allwinner A64? I just learned about it and found out that the Allwinner A64 has an onboard micro controller, an AR100(OpenRISC) cpu which the Recore people put Klipper on for doing stepgen. Klipper is only for 3D printers though. If we got Remora onto that AR100/OpenRISC processor then LinuxCNC is your uncle for everything from CNC, 3D printers and laser cutters. Welp, Scott Alford just reminded me that MBed is only for ARM chips and Remora is built on MBedOS so porting it to the OpenRISC/AR100 wouldn't be an easy task. Darn, the versatility of full LinuxCNC on Remora(or Mesa) is the bomb.

This project (allwincnc) can be used on A64 boards too. A64 it's a H3 with tiny changes But I never tested it on A64 (has no such boards). The firmware (allwincnc, AR100, OpenRISC, ARISC) is already fully optimized for the fast realtime tasks, no need to port anything.

MX_Master wrote:

mwidlok wrote: What is the status of "encoder" module for H3?

I'll try to fix all errors as soon as possible

All the general bugs were fixed. Tested with simple 80PPR encoder. mwidlok, you can continue.

Any other people can join the testing Driver docs are here - allwincnc.github.io/docs.html . Simple HAL file to test a single encoder is here - github.com/allwincnc/linuxcnc/blob/maste...isc-encoder-test.hal

I see the encoders talked about a lot, this is really only for servo systems right? If im running a stepper or closed-loop servo looped only with the drive then encoder inputs are irrelevant correct? or is the stepper signal feedback through an encoder to verify stepper count?

Cncninja wrote: I see the encoders talked about a lot, this is really only for servo systems right? If im running a stepper or closed-loop servo looped only with the drive then encoder inputs are irrelevant correct? or is the stepper signal feedback through an encoder to verify stepper count?

High resolution encoders and linear encoders uses for the DIY high accuracy realtime position feedback (closed loop). Medium resolution encoders uses in mechanical handles. Small resolution encoders uses in some control panels to increase/decrease spindle RPM, cutting speed, etc.