USB logic analyzer problem

Reply: Hans Petter Selasky : "Re: USB logic analyzer problem"
Reply: Tomek CEDRO : "Re: USB logic analyzer problem"
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From: Milan Obuch <freebsd-usb_at_dino.sk>
Date: Wed, 21 Dec 2022 07:44:23 UTC

Hi,

recently I've got two simple USB logic analyzers (one with analog
channel as well), and I am trying to get them working under FreeBSD.
They are

ugen0.x: <vendor 0x08a9 product 0x0014> at usbus0
ugen0.y: <vendor 0x0925 product 0x3881> at usbus0

as seen on plugging in USB port (x, y varies on attempts). These should
be handled by sigrok and pulseview (science/sigrok* and
science/pulseview ports). While building and installing ports was
relatively easy, I did not managed them to work correctly.

Looking at sigrok wiki, both should work with fx2lafw driver, info at

https://sigrok.org/wiki/AZDelivery_Logic_Analyzer/Info
https://sigrok.org/wiki/Noname_LHT00SU1/Info

At first, I thought problem is access rights, as all devices are
created with mode crw-------, uid root. I did not succeed to change
this, trying devd and/or devfs, even manually chmod. As a simple test,
I started pulseview as root, still, no success - I can see my devices
listed and selectable for data acquisition, but trying to get data
yields

sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
sr: fx2lafw: resubmit_transfer: LIBUSB_ERROR_NO_DEVICE
Acquisition took 0.07 s

at best. So, data set is empty, nothing is captured.

I am out of ideas. Has anybody any experience with this kind of devices?
Any idea how to debug this issue?

Regards,
Milan