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  • Hakan
  • Hakan
03 Mar 2026 10:13 - 03 Mar 2026 10:15
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

With loops 100 I easily got a crash.
Unfortunately it dídn't recover. Same old libusb debug message.
hal   failed to wait for requested mode. waited 500ms
task: main loop took 0.018703 seconds
r = -4 when fail
Failed at 1
transmission failed, try to reconnect ...-4
transmission failed, try to reconnect ...-4
connection lost, cleaning up
libusb_handle_events_timeout_completed done 0
libusb_release_interface done -4
libusb_close done
process done

Done with process()
About to tear down usb
Trying again for 100th time
Started while looooop
After initWhb()
init  pausing 3s, waiting for device to be gone ....... done
init  usb context ... ok
init  not waiting for device XHC-WHB04B-6 vendorId=0x10ce productId=0xeb93, will continue in 0s .... ok
init  XHC-WHB04B-6 device found
init  detaching active kernel driver ... ok
init  claiming interface ... ok
Before mUsb.isDeviceOpen()
is Open
libusb: debug [libusb_unref_device] destroy device 3.8
Shutting down and cleaning up LinuxCNC...
Running HAL shutdown script
This is on the "new" N100 mini pc.
  • rodw
  • rodw's Avatar
03 Mar 2026 00:21
Replied by rodw on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Reading something today. Maybe try using smp affinity to lock the USB interrupt to  Core1 (away from core 0 housekeeping) and assuming > 2 cores. You can find the interrupt by
cat /proc/interrupts | grep -i usb

Then follow one of the many posts about cpu affinity for networking. Just remember you need to reset this on every boot.
  • Finngineering
  • Finngineering
02 Mar 2026 20:00
Replied by Finngineering on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Okay, so maybe we can conclude that somehow the hardware is not 100% suitable on your "real" setup?

If you still test on the N100, I believe you could force the setupAsyncTransfer error by putting the loops back to original values (or even higher), and jogging while a program is running.
  • Hakan
  • Hakan
02 Mar 2026 19:20
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Duplicated the setup to a N100 mini-PC.
Couldn't crash the xhc, didn't try for that long though.
So I unplugged the dongle. Put it back.
And it restarted and continued to work. Like magic.

It didn't fail at the usual setupAsyncTransfer, it was somewhere else.
 
  • Q-Man0815
  • Q-Man0815
02 Mar 2026 18:20 - 02 Mar 2026 18:41
Replied by Q-Man0815 on topic Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion

Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion

Category: Deutsch

Signals utilized for operating spindle and feed override. The feed rotary button can serve in
  • Continuous move x% from max velocity
  • Step move x mm
  • MPG override feed/spindle
  • The special position Lead.
    Continuous: In this mode jogging is performed at the selected feed rate. As long the jogwheel turns, the selected axis moves.
    Step: In this mode the machine moves steps  wheel_counts at the currently selected step size and the current set feed rate in machine units. If the commanded position is not reached the machine keeps moving even the jogwheel is not turning.

    Lead: Manipulates the spindle override.

    MPG: Manipulates the feedrate override.

    See here  xhc-whb04b-6  

              Signale, die zum Betätigen von Spindel und Vorschubübersteuerung verwendet werden. Der Vorschub-Drehknopf kann dienen als
  • Countinou: Bewegung x% von der maximalen Geschwindigkeit
  • Steps x mm
  • MPG-Vorschubübersteuerung
  • Die Sonderstellung Lead


         Continous: In diesem Modus wird das Joggen mit der gewählten Vorschubgeschwindigkeit durchgeführt. Wenn man                        das Jogwheel dreht, bewegt sich die ausgewählte Achse. 

          Step: In diesem Modus bewegt die Maschine mit den Schritten  wheel_counts bei der aktuell ausgewählten Schrittgröße                  und der aktuellen Soll Vorschubrate in Maschineneinheiten. Die Maschine bewegt sich so lange bis die Anzahl der Schritte                abgearbeitet ist, selbst dann wenn das Handrad nicht gedreht wird.
         Lead: Manipuliert die Spindelübersteuerung
         MPG: Manipuliert die Vorschubübersteuerung


              Siehe auch   xhc-whb04b-6

 
  • Hakan
  • Hakan
02 Mar 2026 14:35
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Exactly the same log message.
I also tested to unplug + plug back the dongle. Exactly the same log message.
Both ended up in the debug message in libusb.

It can of course be my hardware. It isn't to difficult to test with another test computer I have.
  • Hakan
  • Hakan
02 Mar 2026 13:24
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

I use the built-in :) libusb-1.0 in debian bookworm (12.13)
It says 
#define LIBUSB_API_VERSION 0x01000109
in the include file.

I was able to install libusb 1.28, compile xhc component with it and at least it starts.
I have a minimal milling job this afternoon. I'll see how it reacts.
  • Finngineering
  • Finngineering
02 Mar 2026 11:27
Replied by Finngineering on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

I made some changes in my firmware so I could generate a disconnect at will. Ten times in a row, I got libusb_submit_transfer to return non-zero in Usb::setupAsyncTransfer. And every time, the pendant reconnected to the xhc-whb04b-6 component without issue. In other words, I am unable to reproduce your issue, which more or less means I cannot help you directly. However, you mentioned that you had to change libusb_init_context() to libusb_init(). It appears libusb_init_context() was introduced in libusb 1.0.27:
libusb.sourceforge.io/api-1.0/group__lib...e12023b7399003c50470
Looking at my system, I have libusb 1.0.28-1. I think it would be well worth trying to upgrade libusb. Or if you don't want to do that, you could use LinuxCNC 2.9.8 as a "live cd" to see if that fixes the issue. This would actually be better, since it's possible that the issue could be in the Linux kernel itself.
  • Aciera
  • Aciera's Avatar
02 Mar 2026 06:49
Replied by Aciera on topic Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion

Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion

Category: Deutsch

What does the 'LEAD' function do?
  • Q-Man0815
  • Q-Man0815
01 Mar 2026 16:29 - 02 Mar 2026 06:37
Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion was created by Q-Man0815

Handrad XHC-WHB04b-6 braucht 9b für LEAD Funktion

Category: Deutsch

Hallo Linuxcnc Freunde,

habe festgestellt das bei dem Handrad XHC-WHB04b-6 die Lead Funktion nicht richtig funktioniert.
Habe an der Treiberdatei pendant.cc die Zeile 346 hinzugefügt. Die "oder" Funktion für die 9b oder 1c wurde ja schon mit einegbaut. Danke an alle dafür.

Bei mir funktioniert diese jetzt und lässt sich aktivieren.
Hoffe konnte ein bisschen weiter helfen. Leider muss dazu Linuxcnc neu erstellt werden mit dem make Befehl.

Habe versucht die Datei mit hoch zu laden, hat aber nicht funktioniert.

[edit]
 
  • Finngineering
  • Finngineering
01 Mar 2026 14:05
Replied by Finngineering on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

That was unexpected. For all the world, it looks like this get stuck in libusb somewhere. After the "is Open" debug text, the code does the following:
1. Function call XhcWhb04b6Component::enableReceiveAsyncTransfer()
2. From XhcWhb04b6Component::enableReceiveAsyncTransfer() call Usb::setupAsyncTransfer()
3. From Usb::setupAsyncTransfer() call libusb_submit_transfer()
4. From libusb_submit_transfer() call libusb_unref_device()
5. In libusb_unref_device() print "libusb: debug [libusb_unref_device] destroy device"
6. libusb_submit_transfer() never returns is my guess
Maybe some deadlock inside libusb. Whether that would be from some bug in libusb or because of some improper handling in the xhc-whb04b-6 component, I cannot say. At least at the moment. I'll look into it some more, but not right now.
  • Hakan
  • Hakan
01 Mar 2026 11:31 - 01 Mar 2026 11:33
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Got a crash today. Seems to be the usual way. At mode and screen switch.I have seen that libusb debug printout several times before.Attach are the log and also usb.cc and xhc-whb04b6.cc to be able to follow my printouts. 
  • Finngineering
  • Finngineering
01 Mar 2026 06:51
Replied by Finngineering on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Okay. Once you get a crash, post the output here and we can try to work it through together. Please ensure that you have some print statement in place of the commented out assert call, so if it fails there, we know about it. Something like:
if(r != 0) {
    std::cout << "Usb::setupAsyncTransfer failed with code: " << r << std::endl;
}
  • Hakan
  • Hakan
28 Feb 2026 20:20
Replied by Hakan on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

Still trying to learn exactly where in the code it fails.
It doesn't reconnect, that's for sure. If it had, it wouldn't have been an issue.
I overwrite the log and, alas, no saved useful log.
"Unfortunately" I didn't get a crash today when I worked with the machine.
I like the whb04b a lot.It's worth spending some time improving stability.

 
  • Finngineering
  • Finngineering
28 Feb 2026 17:28
Replied by Finngineering on topic XHC WHB04B development?

XHC WHB04B development?

Category: General LinuxCNC Questions

I was just in the garage using the mill with the pendant. And thought that maybe I should post a mood picture, so we don't forget why we put effort on improving the pendant software :)
 
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