Comments (10)
rene-aguirre
commented on September 26, 2024
@idanstark42 HID class devices are "hard" configured by the USB descriptors.
This is a hardware configuration and capabilities restriction.
One way to work around this, would be to have an adaptor intermediate device, which still sounds to much and specific for a given device. If this is your device (or you have the choice to modify the firmware), I'd rather suggest to change its USB descriptors and operations. Still not straightforward for most people though.
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rene-aguirre
commented on September 26, 2024
@idanstark42 HID class devices are "hard" configured by the USB descriptors.
This is a hardware configuration and capabilities restriction.
One way to work around this, would be to have an adaptor intermediate device, which still sounds to much and specific for a given device. If this is your device (or you have the choice to modify the firmware), I'd rather suggest to change its USB descriptors and operations. Still not straightforward for most people though.
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idanstark42
commented on September 26, 2024
Hi! Thank you for replying. I found the device, thank you! I changed the
used driver through *device manager *from winusb to usbhid, and now the
system finds it. Thank you for your help!
…On Fri, Apr 14, 2017 at 8:27 PM, René Aguirre ***@***.***> wrote:
@idanstark42 <https://github.com/idanstark42> HID class devices are
"hard" configured by the USB descriptors.
This is a hardware configuration and capabilities restriction.
One way to work around this, would be to have an adaptor intermediate
device, which still sounds to much and specific for a given device. If this
is your device (or you have the choice to modify the firmware), I'd rather
suggest to change its USB descriptors and operations. Still not
straightforward for most people though.
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rene-aguirre
commented on September 26, 2024
@idanstark42 interesting... Why do you think this happened? Did you manually install your device initially or had any "filter driver" dealing with it?
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idanstark42
commented on September 26, 2024
Maybe. I did play a bit too much probably with the drivers, trying to use
libusb to make it work.
…On Sat, Apr 15, 2017 at 9:21 AM, René Aguirre ***@***.***> wrote:
@idanstark42 <https://github.com/idanstark42> interesting... Why do you
think this happened? Did you manually install your device initially or had
any "filter driver" dealing with it?
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idanstark42
commented on September 26, 2024
Hi, I was wandering if you could help me out with another problem I have.
My device is a PS/2 mouse but it seems to only return to butttonUsage items
in the first report, and then not giving any other reports.
Also I looked at the report in debugger and it shows
that _HidReport__raw_report_size=2 but _HidReport__raw_data=None.
Do you know why this could happen?
thank you a lot
Idan
…On Sat, Apr 15, 2017 at 12:50 PM, idan stark ***@***.***> wrote:
Maybe. I did play a bit too much probably with the drivers, trying to use
libusb to make it work.
On Sat, Apr 15, 2017 at 9:21 AM, René Aguirre ***@***.***>
wrote:
> @idanstark42 <https://github.com/idanstark42> interesting... Why do you
> think this happened? Did you manually install your device initially or had
> any "filter driver" dealing with it?
>
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub
> <#44 (comment)>,
> or mute the thread
> <https://github.com/notifications/unsubscribe-auth/ASbn2tQ4H_jSy_u96xXnaBlHxBhln3AEks5rwGHxgaJpZM4M9GTl>
> .
>
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rene-aguirre
commented on September 26, 2024
That looks like a valid descriptor.
In this case you only have a single input report, so your device is instructing the HID parser to skip any report Id.
This is kind of a common descriptor structure for very simple devices, likely these are implemented in very resource constrained small SoC silicon devices.
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idanstark42
commented on September 26, 2024
I see. Do you have any idea about the reports not comming in? Here's is my
code:
from pywinusb import hid
from time import sleep
device = hid.HidDeviceFilter(vendor_id=0x13ba,
product_id=0x0018).get_devices()[0]
def sample_handler(raw):
print("data: {0}".format(raw))
try:
device.open()
device.set_raw_data_handler(sample_handler)
while True:
sleep(0.1)
finally:
print("closing")
device.close()
It's pretty straight forward, and yet the sample_handler is never called.
Thanks again for your help!
Idan
…On Sun, Apr 16, 2017 at 9:16 PM, René Aguirre ***@***.***> wrote:
That looks like a valid descriptor.
In this case you only have a single input report, so your device is
instructing the HID parser to skip any report Id.
This is kind of a common descriptor structure for very simple devices,
likely these are implemented in very resource constrained small SoC silicon
devices.
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rene-aguirre
commented on September 26, 2024
There is a big restriction for trying to use HID input devices with PyWinUSB: Windows would "own" the device, so it's just not possible to share access.
If you can actually find your device is because it might expose non input devices usage pages (e.g. LED usage items) and only output or feature reports are available.
Makes sense?
Anyway, this is not a dead end if you still want to capture your device input. Here is where a USB comes handy, but honestly for this you'd might be better off with libusb et. al. kind of libraries.
PyWinUSB "just works", no need for special drivers or config, for regular non input devices, but for keyboards, mice and some game input devices you might actually do it better using other Windows API access calls or events, which actually some are kind of standard events.
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idanstark42
commented on September 26, 2024
Ok, thank you.
I think I got it.
I did use libusb before, and got an empty report there, but I will try
again.
Thank you so much for helping, this is really not taken for granted.
Idan
…On Sun, Apr 16, 2017 at 10:58 PM, René Aguirre ***@***.***> wrote:
There is a big restriction for trying to use HID input devices with
PyWinUSB: Windows would "own" the device, so it's just not possible to
share access.
If you can actually find your device is because it might expose non input
devices usage pages (e.g. LED usage items) and only output or feature
reports are available.
Makes sense?
Anyway, this is not a dead end if you still want to capture your device
input. Here is where a USB comes handy, but honestly for this you'd might
be better off with libusb et. al. kind of libraries.
PyWinUSB "just works", no need for special drivers or config, for regular
non input devices, but for keyboards, mice and some game input devices you
might actually do it better using other Windows API access calls or events,
which actually some are kind of standard events.
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Related Issues (20)
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- WinError 2 HOT 1
- Can I use this library to emulate HID mouse drivers without additional hardware? HOT 1
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- core.py collections callable error
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