Remora - Rpi Software Stepping Using External Microcontroller via SPI

It is all in Beta. You are free to update your own branch.

gtt38 wrote:

The library looks old (stm32plus) and i'm using this repo :
github.com/mhelmarc/Remora-STM32
and this library :
github.com/mhelmarc/stm32plus/tree/musings

 
You're going to have to wait for Scott's port to Mbed-Os .
It might be a while, he just mentioned his new board is on it's way.

The library is as old as your mcu but it's pretty complete.
I have diverge from making a PRU equivalent of Remora.
The library is template heavy, configuration can not be done
at runtime, well you could if you try to do something like what
I did with the GPIOs, but it won't make sense.  It defeat the purpose
of using a library if you're going to rewrite most of it.

well let's do it, what do you have so far and where can i add to it?

@scotta
Hello, thanks for all your work.

I am not from a 3d printing background, and I read
"I've had no need to push the frequency up as possible speed ~200mm/sec for a
3D printer setup is more than adequate."

What is the typical 3D printing pitch, gearing, max rpm, stepsize?
I am sure if i google that i will get a lot of differing answers,
but you have a vision i would like to understand.

The STM port sounds good, as the MKS and SKR boards seem unobtainable.

Thanks TomP

edit
oh ( tomp fiddles with calculator )...
i suppose its a 4mm pitch with 1/4 microsteps and 40khz pulse rate, so 5um stepsize
so the only thing left to ask is
what accelerationis typical? I know its machine dependant but at some low value it may bother printing.

thx tomp

@cakeslob @mhel
did you ever get Xmotion to work?
If possible, please tell how
a non-x framebuffer solution removes a load from cpu.
I failed to get it to work, many times
thx
tomp

I actually haven't touch it yet, I just had a looked at it.
a few months ago. It's using LVGL gui toolkit, I had a
chance to use that toolkit when I made a simple
coin operated wifi for my nephew, but that's all.
Maybe you're better off asking here: forum.linuxcnc.org/41-guis/35225-new-gui...dded-systems?start=0 that's where I found it.