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Pin8 of the servo driver is like written in pinout a inhibit pin. So this should be connected to the mesa enable+ pin and enable- pin to GND. The Manual i ve attached says Pin 8 can sink about 200mA but this has nothing to do with how much it draws. So the 50mA of the enable switch should be fine right?

I did type
sudo lspci -v
did i?
-
The port is there and working, but there is no info on capabilities as you did not use sudo.
The port address to type into the wizard is 0xe000

Here is the relevant section of the response to lspci -v
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

01:00.0 Serial controller: Nanjing Qinheng Microelectronics Co., Ltd. CH384 Dual Port Serial and Parallel Port Adapter (rev 10) (prog-if 05 [16850])
    Subsystem: Nanjing Qinheng Microelectronics Co., Ltd. CH384 Dual Port Serial and Parallel Port Adapter
    Flags: fast devsel, IRQ 16, IOMMU group 2
    I/O ports at e000
    Memory at df308000 (32-bit, prefetchable) [size=32K]
    I/O ports at e100
    Expansion ROM at df300000 [disabled] [size=32K]
    Capabilities: <access denied>
    Kernel driver in use: wchpciserial+
    Kernel modules: parport_serial, wch, wch_pre

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Thanks,
Marty

That's nice, how is the latency? It might help to isolate the last 4 cores (isolcpus=2-5)if just isolating the last core is not good enough (isolcpus=5)

For spi, open /boot/armbianEnv.txt and edit the following:
overlay_prefix=rockchip-rk3399
overlays=spi-spidev

royka wrote:

You can try this rt kernel for the rk3399:
drive.google.com/drive/folders/12VfNmKC3...feCnnzYX?usp=sharing

For the spi rt patch I'll see if I'm able to do something. For sure it won't be as complete as the "original" patch but maybe it'll be good enough.
Have you already been able to use the spidev driver at all?
 

This worked and it made it real-time.
However its spi driver couldnt be enabled. I mean I've enabled it from armbina-config but in /dev/ directory, the spidev doesnt show up.

What would be the best 3d printer board to use with remora spi and raspberry pi 5 please? For k40 style co2 laser, so I dont need too many motors.

Of topic , bare with me , posting quote , that _ _ _ _ _? _ _ _  in editor ,i'll get it somehow ,
did struggle too posting two links in one post .
And the  manual editing in source code mode?  some i dont get yet ..
should find it on Kanena forum help ,  
As long as it does login post & reply !!!
Cheers
 

Moin
Ich habe ein Problem mit meiner Karte, sobald ich 5v anlege blinken kurz die Leds auf und das wars.
vor einem halben Jahr bin ich umgezogen und bis dahin lief alles ohne Probleme. Heute habe ich endlich mal Zeit gefunden mich um die Fräse zu kümmern und wollte sie einschalten, ohne erfolg...
Mit einem zweiten Netzteil habe ich genau dasselbe Bild. Die umliegenden Wiederstände haben alle ein wert, leider weiß ich nicht was sie haben müssen um zu sagen ob einer durchgebrannt ist.
 

PCW post=315038 userid=481
This should be close:

Thanks , did not expect that so quickly !!
may you already started to work on it the 2 years ago ,anyhow ,
more bow on support , 
Does seem very close if not exactly it .
Let's see what olds sl bulky bobs get to with this  .

Picture a whole bunch of penguins clapping or at least one .
  Regards
PJ

In a terminal
sudo lspci -v
See if there is a parallel port and at what address.