pyusb-users — PyUSB users mailing list discussion

[pyusb-users] Issue finding backend when exe created with pyinstaller 3.1.1

[Jay N. <ja...@ne...>]

I have been having issues getting my program to run as an exe using packager
pyinstaller version 3.1.1. There is a version 3.2 but it has other issues so
I cannot use it. My program checks the status of the Zebra KR403 printer and
my program works fine in my Python 2.7.9 environment, PYUsb 1.0.0, on
Windows 7,  but when I create the exe it does not work. Pyinstaller 2.1
works ok but my other parts of my program have been updated and I cannot use
it any longer, the list of problems there is too long. 

 

This is how I set up the backend in my code in my python environment:

 

import usb

import usb.core

import usb.util

import usb.backend.libusb10 as libusb10

import sys

import requests

dev = usb.core.find(idVendor= int(VID), idProduct= int(PID),
backend=libusb10.get_backend()) 

 

After creating my exe, when I run it from the command prompt I get the
following:

 

Traceback (most recent call last):

  File "<string>", line 184, in <module>

  File "usb\core.py", line 846, in find

ValueError: No backend available

ZebraKR403PaperStatus2.2 returned -1

 

I understand that this could be an issue with pyinstaller and I will report
the same issue there. Does anyone else have this issue or have a solution?

 

Thanks in advance:

 

Jay

 

 

 

 

 

Re: [pyusb-users] [Released] PyUSB 1.0.0 (stable)

[Jacques-D. P. <Jac...@bl...>]

Gratulations for the achievment!
And all the hard work behind...

Best Regards,
Jacques-D.

On 01. 05. 16 01:09, Wander Lairson Costa wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi there,
>
> I am proud to announce that the stable version is finally out! Many
> thanks to all of you who has contributed to this milestone.
>
> - --
> Best Regards,
> Wander Lairson Costa
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1
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> iQEcBAEBAgAGBQJXJTsuAAoJEAhMVYRULhV0vCMH/R9iBMISphJVi4JDx1bjydeP
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> =jPxu
> -----END PGP SIGNATURE-----
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>

Re: [pyusb-users] [Released] PyUSB 1.0.0 (stable)

[Er. J. V. <jay...@gm...>]

Great.

On Sun, May 1, 2016 at 4:39 AM, Wander Lairson Costa <
wan...@gm...> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi there,
>
> I am proud to announce that the stable version is finally out! Many
> thanks to all of you who has contributed to this milestone.
>
> - --
> Best Regards,
> Wander Lairson Costa
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1
>
> iQEcBAEBAgAGBQJXJTsuAAoJEAhMVYRULhV0vCMH/R9iBMISphJVi4JDx1bjydeP
> KlaFRRTzHHhJ3nybPNVEbdW/wSZYymY+Mj3rCA8xowVXaGF37ozG/ghIKPQBO8gx
> FjlwzK02gbX5KI41UMMjKs++6Iq5megzYYaA3NEPf92bg17a2bSDLrMeecSreOjd
> UoA0Hr692YPAx5aKpX1y3Jvj3PUlCE6qhRY8wnIVtpiG6co5tAt8n5Cras+wsbHo
> x3kx6t3iX4t+qeqed6k4FMiGmZ205uiv+FaySu2CAwTLgEsCKMdym4xA6f08bwb9
> DX1mMlqSfJdVnhndsBuf7ZGx6v8aUZ5Q9hIZSdJjCI+N4FCKzeDYyZNcPyQQgts=
> =jPxu
> -----END PGP SIGNATURE-----
>
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications
> Manager
> Applications Manager provides deep performance insights into multiple
> tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>



-- 

Thanks,
Regards,

*Er. Jay Vora*
M : 91 - 9879354457.
(Not miles, just an email away...)
Twitter <http://twitter.com/#%21/jaynvora> Facebook
<http://www.facebook.com/jaynvora> LinkedIn
<http://www.linkedin.com/in/jaynvora> Blogger <http://jayvora.blogspot.com>
"No Seconds to be Wasted for Formalities, I have a lot to Execute !" - Jay
Vora

[pyusb-users] [Released] PyUSB 1.0.0 (stable)

[Wander L. C. <wan...@gm...>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi there,

I am proud to announce that the stable version is finally out! Many
thanks to all of you who has contributed to this milestone.

- --
Best Regards,
Wander Lairson Costa

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

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=jPxu
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Re: [pyusb-users] Barcode Scanner

[John T. <jt...@gn...>]

Steve,

Thanks so much for the info and the link all I can say is wow. The 
scanner is indeed a Honeywell Xenon Model 1900. And I'm using LinuxMint 
17.3 as the OS. I will go down the pyserial path. So much to learn and 
so little time.

Thanks
JT

On 4/24/2016 2:33 PM, Steven Michalske wrote:
> John,
>
> Not knowing your exact barcode scanner is a real hindrance.
> One good piece of information you forgot to provide was what exactly you were interfacing to.
> USB barcode scanner is too generic,  you need read http://catb.org/esr/faqs/smart-questions.html
>
> That being said the VID is from Honeywell, so here is on of their manuals for a 2d barcode reader.
> See page 2-4 of http://www.honeywellaidc.com/CatalogDocuments/Xenon-UG.pdf
> Clearly it states that to enable the USB CDC mode you scan that barcode.
>
> To enable USB-CDC mode of the barcode scanner.
> Windows needs a driver, but mac and linux will use the generic USB-CDC driver.
>
> Now you will connect with pySerial and communicate with your barcode scanner as a serial device.
>
> Happy hacking,
> Steve
>
>> On Apr 24, 2016, at 7:22 AM, Dietmar Schwertberger <mai...@sc...> wrote:
>>
>> On 24.04.2016 14:34, John Thornton wrote:
>>> I've established communications with it and added a udev rule and added
>>> myself to the scanner group so I could talk to the scanner. And the
>>> results so far are:
>> A long way to go...
>>
>>> On 4/24/2016 6:06 AM, Dietmar Schwertberger wrote:
>>>> button and they send keystrokes.
>>>> You should have info from the manufacturer of your scanner. Maybe he has
>>>> implemented CDC (aka Virtual COM Port).
>> For Windows, Honeywell offers a USB Serial Driver.
>> So you may try CDC as well, either as serial port or via pyusb.
>>
>> Regards,
>>
>> Dietmar
>>
>> ------------------------------------------------------------------------------
>> Find and fix application performance issues faster with Applications Manager
>> Applications Manager provides deep performance insights into multiple tiers of
>> your business applications. It resolves application problems quickly and
>> reduces your MTTR. Get your free trial!
>> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
>> _______________________________________________
>> pyusb-users mailing list
>> pyu...@li...
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] Barcode Scanner

[Steven M. <smi...@gm...>]

John,

Not knowing your exact barcode scanner is a real hindrance.
One good piece of information you forgot to provide was what exactly you were interfacing to.
USB barcode scanner is too generic,  you need read http://catb.org/esr/faqs/smart-questions.html

That being said the VID is from Honeywell, so here is on of their manuals for a 2d barcode reader.
See page 2-4 of http://www.honeywellaidc.com/CatalogDocuments/Xenon-UG.pdf
Clearly it states that to enable the USB CDC mode you scan that barcode.

To enable USB-CDC mode of the barcode scanner.
Windows needs a driver, but mac and linux will use the generic USB-CDC driver.

Now you will connect with pySerial and communicate with your barcode scanner as a serial device.

Happy hacking,
Steve

> On Apr 24, 2016, at 7:22 AM, Dietmar Schwertberger <mai...@sc...> wrote:
> 
> On 24.04.2016 14:34, John Thornton wrote:
>> I've established communications with it and added a udev rule and added
>> myself to the scanner group so I could talk to the scanner. And the
>> results so far are:
> A long way to go...
> 
>> On 4/24/2016 6:06 AM, Dietmar Schwertberger wrote:
>>> button and they send keystrokes.
>>> You should have info from the manufacturer of your scanner. Maybe he has
>>> implemented CDC (aka Virtual COM Port).
> For Windows, Honeywell offers a USB Serial Driver.
> So you may try CDC as well, either as serial port or via pyusb.
> 
> Regards,
> 
> Dietmar
> 
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] Barcode Scanner

[Dietmar S. <mai...@sc...>]

On 24.04.2016 14:34, John Thornton wrote:
> I've established communications with it and added a udev rule and added
> myself to the scanner group so I could talk to the scanner. And the
> results so far are:
A long way to go...

> On 4/24/2016 6:06 AM, Dietmar Schwertberger wrote:
>> button and they send keystrokes.
>> You should have info from the manufacturer of your scanner. Maybe he has
>> implemented CDC (aka Virtual COM Port).
For Windows, Honeywell offers a USB Serial Driver.
So you may try CDC as well, either as serial port or via pyusb.

Regards,

Dietmar

Re: [pyusb-users] Barcode Scanner

[John T. <jt...@gn...>]

In this case it is a hand scanner to test the code with as the second 
project is an operator will scan a bar code and auto load the G code 
file into the CNC software.

I've established communications with it and added a udev rule and added 
myself to the scanner group so I could talk to the scanner. And the 
results so far are:

$ python
Python 2.7.6 (default, Jun 22 2015, 18:00:18)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import usb.core
>>> dev = usb.core.find(idVendor=0x0c2e, idProduct=0x0901)
>>> dev.is_kernel_driver_active(0)
True
>>>

JT

On 4/24/2016 6:06 AM, Dietmar Schwertberger wrote:
> On 24.04.2016 13:00, John Thornton wrote:
>> The basic process is a part with a data sheet comes down the conveyor
>> and when the part is in position the data sheet is scanned. The info
>> from the data sheet is used by the controlling program to select the
>> correct part program and other things.
> But then it's not one of the standard handscanners where you press a
> button and they send keystrokes.
> You should have info from the manufacturer of your scanner. Maybe he has
> implemented CDC (aka Virtual COM Port).
>
> Regards,
>
> Dietmar
>
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] Barcode Scanner

[Dietmar S. <mai...@sc...>]

On 24.04.2016 13:00, John Thornton wrote:
> The basic process is a part with a data sheet comes down the conveyor
> and when the part is in position the data sheet is scanned. The info
> from the data sheet is used by the controlling program to select the
> correct part program and other things.
But then it's not one of the standard handscanners where you press a 
button and they send keystrokes.
You should have info from the manufacturer of your scanner. Maybe he has 
implemented CDC (aka Virtual COM Port).

Regards,

Dietmar

Re: [pyusb-users] Barcode Scanner

[John T. <jt...@gn...>]

The basic process is a part with a data sheet comes down the conveyor 
and when the part is in position the data sheet is scanned. The info 
from the data sheet is used by the controlling program to select the 
correct part program and other things.

JT

On 4/23/2016 10:38 AM, Tom Sanders wrote:
> Most barcode scanners work like keyboards: they simulate keypresses.
> IMO using pyusb is propably overkill. I would go for the standard keyboard input routines.
>
> Cheers
> Tom
>
>
>> I'm trying to scan a barcode into a python program. Are there any
>> tutorials on doing this with pyusb? Or any hints on where to start.
>>
>> So far I've loaded pyusb 1.x and can get a list of the USB busses and
>> I've found out how to use pydoc to get the docs.
>>
>> JT
>>
>> ------------------------------------------------------------------------------
>> Find and fix application performance issues faster with Applications Manager
>> Applications Manager provides deep performance insights into multiple tiers of
>> your business applications. It resolves application problems quickly and
>> reduces your MTTR. Get your free trial!
>> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
>> _______________________________________________
>> pyusb-users mailing list
>> pyu...@li...
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] Barcode Scanner

[John T. <jt...@gn...>]

The problem with that is I have to scan a G code file name into LinuxCNC 
without any operator. So it has to be automatic.

JT

On 4/23/2016 10:38 AM, Tom Sanders wrote:
> Most barcode scanners work like keyboards: they simulate keypresses.
> IMO using pyusb is propably overkill. I would go for the standard keyboard input routines.
>
> Cheers
> Tom
>
>
>> I'm trying to scan a barcode into a python program. Are there any
>> tutorials on doing this with pyusb? Or any hints on where to start.
>>
>> So far I've loaded pyusb 1.x and can get a list of the USB busses and
>> I've found out how to use pydoc to get the docs.
>>
>> JT
>>
>> ------------------------------------------------------------------------------
>> Find and fix application performance issues faster with Applications Manager
>> Applications Manager provides deep performance insights into multiple tiers of
>> your business applications. It resolves application problems quickly and
>> reduces your MTTR. Get your free trial!
>> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
>> _______________________________________________
>> pyusb-users mailing list
>> pyu...@li...
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] Barcode Scanner

[Tom S. <t.s...@dg...>]

Most barcode scanners work like keyboards: they simulate keypresses.
IMO using pyusb is propably overkill. I would go for the standard keyboard input routines.

Cheers
Tom


> I'm trying to scan a barcode into a python program. Are there any
> tutorials on doing this with pyusb? Or any hints on where to start.
>
> So far I've loaded pyusb 1.x and can get a list of the USB busses and
> I've found out how to use pydoc to get the docs.
>
> JT
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>

[pyusb-users] Barcode Scanner

[John T. <jt...@gn...>]

I'm trying to scan a barcode into a python program. Are there any 
tutorials on doing this with pyusb? Or any hints on where to start.

So far I've loaded pyusb 1.x and can get a list of the USB busses and 
I've found out how to use pydoc to get the docs.

JT

Re: [pyusb-users] "Resource Busy" error message.

[burgie s. <mr...@gm...>]

Thanks for that, that was all I needed to work it out, looking at the help
for various commands

Adjusted the code as follows and it works great every time:

dev.reset()
if dev.is_kernel_driver_active(0) == True:
        dev.detach_kernel_driver(0)
dev.set_configuration()


Cheers
Clint


On Fri, Apr 8, 2016 at 10:48 AM, Alan Jhonn Aguiar Schwyn <
al...@ho...> wrote:

> This returns "true" ?
>
> dev.is_kernel_driver_active()
>
>
> ------------------------------
> Date: Fri, 8 Apr 2016 10:42:07 +1000
> From: mr...@gm...
> To: pyu...@li...
> Subject: [pyusb-users] "Resource Busy" error message.
>
>
> Hi All,
>
> First time poster here from Brisbane Australia :)
> I have only just started with using pyusb, so any advice would be greatly
> appreciated.
>
> My system -  64bit Arch Linux.
>
>
> I'm attempting to send commands to a Kuando Busylight (
> http://www.plenom.com/), using the example code here -
> https://github.com/walac/pyusb/blob/master/docs/tutorial.rst.  At this
> stage all I have changed in the source code is the vendor and product
> ids to match the Busylight.
>
> The device is being found without problems using Vendor and Product IDs:
> "dev = usb.core.find(idVendor=0x04d8, idProduct=0xf848)"
>
> The next line  "dev.set_configuration()" is raising a USBError.
>
>
> Result is the same in Python 2.7:
>
> Traceback (most recent call last):
>   File "./busylight.py", line 19, in <module>
>     dev.set_configuration()
>   File "/usr/lib/python2.7/site-packages/usb/core.py", line 799, in
> set_configuration
>     self._ctx.managed_set_configuration(self, configuration)
>   File "/usr/lib/python2.7/site-packages/usb/core.py", line 128, in
> managed_set_configuration
>     self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
>   File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line
> 730, in set_configuration
>     _check(self.lib.libusb_set_configuration(dev_handle.handle,
> config_value))
>   File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line
> 552, in _check
>     raise USBError(_strerror(ret), ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 16] Resource busy
>
>
> And also in Python 3.5:
>
> Traceback (most recent call last):
>   File "./busylight.py", line 19, in <module>
>     dev.set_configuration()
>   File "/usr/lib/python3.5/site-packages/usb/core.py", line 799, in
> set_configuration
>     self._ctx.managed_set_configuration(self, configuration)
>   File "/usr/lib/python3.5/site-packages/usb/core.py", line 128, in
> managed_set_configuration
>     self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
>   File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line
> 730, in set_configuration
>     _check(self.lib.libusb_set_configuration(dev_handle.handle,
> config_value))
>   File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line
> 552, in _check
>     raise USBError(_strerror(ret), ret, _libusb_errno[ret])
> usb.core.USBError: [Errno 16] Resource busy
>
>
> Thanks in advance.
>
>
> Cheers
> Clint
>
>
> ------------------------------------------------------------------------------
> _______________________________________________ pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
>
> ------------------------------------------------------------------------------
>
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
>

Re: [pyusb-users] "Resource Busy" error message.

[Alan J. A. S. <al...@ho...>]

This returns "true" ?
dev.is_kernel_driver_active()

Date: Fri, 8 Apr 2016 10:42:07 +1000
From: mr...@gm...
To: pyu...@li...
Subject: [pyusb-users] "Resource Busy" error message.

Hi All,
First time poster here from Brisbane Australia :)I have only just started with using pyusb, so any advice would be greatly appreciated.
My system -  64bit Arch Linux.

I'm attempting to send commands to a Kuando Busylight (http://www.plenom.com/), using the example code here - https://github.com/walac/pyusb/blob/master/docs/tutorial.rst.  At this stage all I have changed in the source code is the vendor and product ids to match the Busylight.
The device is being found without problems using Vendor and Product IDs:"dev = usb.core.find(idVendor=0x04d8, idProduct=0xf848)"
The next line  "dev.set_configuration()" is raising a USBError.

Result is the same in Python 2.7:

Traceback (most recent call last):
  File "./busylight.py", line 19, in <module>
    dev.set_configuration()
  File "/usr/lib/python2.7/site-packages/usb/core.py", line 799, in set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "/usr/lib/python2.7/site-packages/usb/core.py", line 128, in managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line 730, in set_configuration
    _check(self.lib.libusb_set_configuration(dev_handle.handle, config_value))
  File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line 552, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy


And also in Python 3.5:
Traceback (most recent call last):
  File "./busylight.py", line 19, in <module>
    dev.set_configuration()
  File "/usr/lib/python3.5/site-packages/usb/core.py", line 799, in set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "/usr/lib/python3.5/site-packages/usb/core.py", line 128, in managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line 730, in set_configuration
    _check(self.lib.libusb_set_configuration(dev_handle.handle, config_value))
  File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line 552, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy

Thanks in advance.

Cheers
Clint


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[pyusb-users] "Resource Busy" error message.

[burgie s. <mr...@gm...>]

Hi All,

First time poster here from Brisbane Australia :)
I have only just started with using pyusb, so any advice would be greatly
appreciated.

My system -  64bit Arch Linux.


I'm attempting to send commands to a Kuando Busylight (
http://www.plenom.com/), using the example code here -
https://github.com/walac/pyusb/blob/master/docs/tutorial.rst.  At this
stage all I have changed in the source code is the vendor and product
ids to match the Busylight.

The device is being found without problems using Vendor and Product IDs:
"dev = usb.core.find(idVendor=0x04d8, idProduct=0xf848)"

The next line  "dev.set_configuration()" is raising a USBError.


Result is the same in Python 2.7:

Traceback (most recent call last):
  File "./busylight.py", line 19, in <module>
    dev.set_configuration()
  File "/usr/lib/python2.7/site-packages/usb/core.py", line 799, in
set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "/usr/lib/python2.7/site-packages/usb/core.py", line 128, in
managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line 730,
in set_configuration
    _check(self.lib.libusb_set_configuration(dev_handle.handle,
config_value))
  File "/usr/lib/python2.7/site-packages/usb/backend/libusb1.py", line 552,
in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy


And also in Python 3.5:

Traceback (most recent call last):
  File "./busylight.py", line 19, in <module>
    dev.set_configuration()
  File "/usr/lib/python3.5/site-packages/usb/core.py", line 799, in
set_configuration
    self._ctx.managed_set_configuration(self, configuration)
  File "/usr/lib/python3.5/site-packages/usb/core.py", line 128, in
managed_set_configuration
    self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
  File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line 730,
in set_configuration
    _check(self.lib.libusb_set_configuration(dev_handle.handle,
config_value))
  File "/usr/lib/python3.5/site-packages/usb/backend/libusb1.py", line 552,
in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy


Thanks in advance.


Cheers
Clint

[pyusb-users] PyUSB and Python4Android

[Mark M. <mar...@gm...>]

Hi All,

I plan to use Kivy with a USB-connected device on Android, and I am
researching the various options available to me.  I have a C-based solution
with Python wrapper that works using libusb + libftdi right now (on
Windows/Linux), but my initial impression is that this is not going to work
on Android as libusb is not the default driver.  However, I noticed there
is a recipe in Python4Android here:
https://github.com/kivy/python-for-android/tree/master/pythonforandroid/recipes/pyusb

This seems to indicate that pyusb, and maybe even libusb is usable somehow
on Android from Python?  Does anyone know anything about this?  And can
anyone confirm if this will work (or not work)?

My other alternative is to use the native Java D2XX library from FTDI and
wrap that it Python using pyjnius.  I'm just trying to get a feel for what
is the least amount of work (or the best overall solution) at the moment.

Thanks,
Mark.

Re: [pyusb-users] Yet another user with backend problems ...

[Till H. <ti...@ha...>]

Hi,

i am too sorry. Having searched half the evening a few seconds after asking my 
question i found the "Specifying libraries by hand" section in the manual. 

And indeed this:

    >>> import usb.core
    >>> import usb.backend.libusb1
    >>>
    >>> backend = usb.backend.libusb1.get_backend(find_library=lambda x: "/
usr/lib/libusb-1.0.so")
    >>> dev     = usb.core.find(..., backend=backend)

Solves my problem!!

Sorry for asking too early!

Till

On Sunday, March 20, 2016 12:10:49 PM Till Harbaum wrote:
> Hi,
> 
> i am trying to use pyusb on a buildroot based embedded setup running on a ti
> sitara. But i struggle to get it to recognize a backend:
> 
> # python
> Python 2.7.11 (default, Mar 19 2016, 14:18:04)
> [GCC 5.2.1 20151005] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
> >>> import os
> >>> os.environ['PYUSB_DEBUG'] = 'debug'
> >>> import usb.core
> >>> usb.core.find()
> 
> 2016-03-19 22:11:46,002 ERROR:usb.libloader:'Libusb 1' could not be found
> 2016-03-19 22:11:46,013 ERROR:usb.backend.libusb1:Error loading libusb 1.0
> backend
> 2016-03-19 22:11:46,079 ERROR:usb.libloader:'OpenUSB library' could not be
> found
> 2016-03-19 22:11:46,089 ERROR:usb.backend.openusb:Error loading OpenUSB
> backend
> 2016-03-19 22:11:46,258 ERROR:usb.libloader:'Libusb 0' could not be found
> 2016-03-19 22:11:46,268 ERROR:usb.backend.libusb0:Error loading libusb 0.1
> backend
> 
> The shared libs are there:
> # ls -la /usr/lib/libusb*
> lrwxrwxrwx    1 root     root            19 Mar 19 14:51 /usr/lib/
> libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
> -rwxr-xr-x    1 root     root         10872 Mar 19 15:17 /usr/lib/
> libusb-0.1.so.4.4.4
> lrwxrwxrwx    1 root     root            19 Mar 19 14:20 /usr/lib/
> libusb-1.0.so -> libusb-1.0.so.0.1.0
> lrwxrwxrwx    1 root     root            19 Mar 19 14:20 /usr/lib/
> libusb-1.0.so.0 -> libusb-1.0.so.0.1.0
> -rwxr-xr-x    1 root     root         57400 Mar 19 15:17 /usr/lib/
> libusb-1.0.so.0.1.0
> lrwxrwxrwx    1 root     root            19 Mar 19 14:51 /usr/lib/libusb.so
> -> libusb-0.1.so.4.4.4
> 
> Now i am missing the bridge between pyusb and those shared libs.
> 
> How can i debug further? I tried stracing the whole setup but i don't see it
> even trying to open any library. How exaclty is pyusb trying to open those
> libraries. Under which paths and which names is it supposed to search?
> 
> Thanks,
>   Till

-- 
Dr. Till Harbaum <ti...@ha...>

[pyusb-users] Yet another user with backend problems ...

[Till H. <ti...@ha...>]

Hi,

i am trying to use pyusb on a buildroot based embedded setup running on a ti 
sitara. But i struggle to get it to recognize a backend:

# python
Python 2.7.11 (default, Mar 19 2016, 14:18:04) 
[GCC 5.2.1 20151005] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.environ['PYUSB_DEBUG'] = 'debug'
>>> import usb.core
>>> usb.core.find()
2016-03-19 22:11:46,002 ERROR:usb.libloader:'Libusb 1' could not be found
2016-03-19 22:11:46,013 ERROR:usb.backend.libusb1:Error loading libusb 1.0 
backend
2016-03-19 22:11:46,079 ERROR:usb.libloader:'OpenUSB library' could not be 
found
2016-03-19 22:11:46,089 ERROR:usb.backend.openusb:Error loading OpenUSB 
backend
2016-03-19 22:11:46,258 ERROR:usb.libloader:'Libusb 0' could not be found
2016-03-19 22:11:46,268 ERROR:usb.backend.libusb0:Error loading libusb 0.1 
backend

The shared libs are there:
# ls -la /usr/lib/libusb*
lrwxrwxrwx    1 root     root            19 Mar 19 14:51 /usr/lib/
libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
-rwxr-xr-x    1 root     root         10872 Mar 19 15:17 /usr/lib/
libusb-0.1.so.4.4.4
lrwxrwxrwx    1 root     root            19 Mar 19 14:20 /usr/lib/
libusb-1.0.so -> libusb-1.0.so.0.1.0
lrwxrwxrwx    1 root     root            19 Mar 19 14:20 /usr/lib/
libusb-1.0.so.0 -> libusb-1.0.so.0.1.0
-rwxr-xr-x    1 root     root         57400 Mar 19 15:17 /usr/lib/
libusb-1.0.so.0.1.0
lrwxrwxrwx    1 root     root            19 Mar 19 14:51 /usr/lib/libusb.so -> 
libusb-0.1.so.4.4.4

Now i am missing the bridge between pyusb and those shared libs.

How can i debug further? I tried stracing the whole setup but i don't see it 
even trying to open any library. How exaclty is pyusb trying to open those 
libraries. Under which paths and which names is it supposed to search?

Thanks,
  Till

-- 
Dr. Till Harbaum <ti...@ha...>

Re: [pyusb-users] Using a different backend

[keith <ke...@th...>]

Thanks! I think pywinusb will be what I need. Thanks for the help!

keith

-----Original Message-----
From: Xiaofan Chen [mailto:xia...@gm...] 
Sent: Thursday, March 10, 2016 8:30 PM
To: pyu...@li...
Subject: Re: [pyusb-users] Using a different backend

On Fri, Mar 11, 2016 at 7:29 AM, keith <ke...@th...> wrote:
> I have a project I am working on that uses python to communicate with 
> a HID usb device (two way communication). It’s currently working fine 
> using pyUSB and the libUSB-win32. However the client wants to try and 
> avoid the step of installing the libUSB driver.
>
> Currently when you plugin the device it uses HidUsb (c6.1.76…) for the 
> default driver. I then have to replace the driver with libUSB using 
> zadig in order for pyusb to be able to access it.
>
> Is there a way to use the default driver (hid.dll I think) when using 
> pyusb instead of libusb? This is on Windows 7+. Python 3.5.
>
> Thanks for any help you can give or pointing me in the right 
> direction,

You should switch to libusb-1.0 backend of pyusb, libusb under Windows work with HID device with the need to switching driver to
libusb-win32 or WinUSb. But there are some limitations.

For generic HID device, it should work. You do need to have libusb-1.0.dll in the system.

The other potentially better choice is to use pywinusb if your application is only for Windows.

   https://pypi.python.org/pypi/pywinusb/
   https://github.com/rene-aguirre/pywinusb/wiki/Introduction

If you need cross-platform support for your Python application, then pyusb and pywinusb are not good choice for HID device.
In that case, you can look at HIDAPI and its Python binding.
You do need to have HIDAPI in the system.
  https://github.com/signal11/hidapi
  https://github.com/apmorton/pyhidapi
  https://github.com/gbishop/cython-hidapi


--
Xiaofan

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Re: [pyusb-users] Trying to write to OUT EP Bulk on Win10

[Xiaofan C. <xia...@gm...>]

On Wed, Mar 9, 2016 at 4:59 PM, Xiaofan Chen <xia...@gm...> wrote:
> On Wed, Mar 9, 2016 at 3:13 PM, Igor Bezenchuk <ig...@ho...> wrote:
>> I read at libusb maling list about usbdk which, from its description, should
>> allow to attach and detach device drivers under windows. Did you hear about
>> it? can it be combined with pyusb?
>
> Yes. It should be okay to work with pyusb.
>
> On the other hand, you need to install usbdk on the computer. There is
> no Inbox Windows driver which can do the things you want. And I consider
> usbdk to be a custom driver as well.
>

Further discussion here.
http://libusb.6.n5.nabble.com/libusb-Write-to-OUT-EP-bulk-device-random-Bulk-data-on-Windows-td5715683.html


-- 
Xiaofan

Re: [pyusb-users] Using a different backend

[Xiaofan C. <xia...@gm...>]

On Fri, Mar 11, 2016 at 7:29 AM, keith <ke...@th...> wrote:
> I have a project I am working on that uses python to communicate with a HID
> usb device (two way communication). It’s currently working fine using pyUSB
> and the libUSB-win32. However the client wants to try and avoid the step of
> installing the libUSB driver.
>
> Currently when you plugin the device it uses HidUsb (c6.1.76…) for the
> default driver. I then have to replace the driver with libUSB using zadig in
> order for pyusb to be able to access it.
>
> Is there a way to use the default driver (hid.dll I think) when using pyusb
> instead of libusb? This is on Windows 7+. Python 3.5.
>
> Thanks for any help you can give or pointing me in the right direction,

You should switch to libusb-1.0 backend of pyusb, libusb under
Windows work with HID device with the need to switching driver to
libusb-win32 or WinUSb. But there are some limitations.

For generic HID device, it should work. You do need to have
libusb-1.0.dll in the system.

The other potentially better choice is to use pywinusb if your application
is only for Windows.

   https://pypi.python.org/pypi/pywinusb/
   https://github.com/rene-aguirre/pywinusb/wiki/Introduction

If you need cross-platform support for your Python application,
then pyusb and pywinusb are not good choice for HID device.
In that case, you can look at HIDAPI and its Python binding.
You do need to have HIDAPI in the system.
  https://github.com/signal11/hidapi
  https://github.com/apmorton/pyhidapi
  https://github.com/gbishop/cython-hidapi


-- 
Xiaofan

[pyusb-users] Using a different backend

[keith <ke...@th...>]

Hello,

 

I have a project I am working on that uses python to communicate with a HID
usb device (two way communication). It's currently working fine using pyUSB
and the libUSB-win32. However the client wants to try and avoid the step of
installing the libUSB driver. 

 

Currently when you plugin the device it uses HidUsb (c6.1.76.) for the
default driver. I then have to replace the driver with libUSB using zadig in
order for pyusb to be able to access it. 

 

Is there a way to use the default driver (hid.dll I think) when using pyusb
instead of libusb? This is on Windows 7+. Python 3.5.

 

Thanks for any help you can give or pointing me in the right direction,

 

Keith

 

Re: [pyusb-users] Trying to write to OUT EP Bulk on Win10

[Xiaofan C. <xia...@gm...>]

On Wed, Mar 9, 2016 at 3:13 PM, Igor Bezenchuk <ig...@ho...> wrote:
> I read at libusb maling list about usbdk which, from its description, should
> allow to attach and detach device drivers under windows. Did you hear about
> it? can it be combined with pyusb?

Yes. It should be okay to work with pyusb.

On the other hand, you need to install usbdk on the computer. There is
no Inbox Windows driver which can do the things you want. And I consider
usbdk to be a custom driver as well.

-- 
Xiaofan

Re: [pyusb-users] Trying to write to OUT EP Bulk on Win10

[Igor B. <ig...@ho...>]

I read at libusb maling list about usbdk which, from its description, should allow to attach and detach device drivers under windows. Did you hear about it? can it be combined with pyusb?

> Date: Wed, 9 Mar 2016 10:46:45 +0800
> From: xia...@gm...
> To: pyu...@li...
> Subject: Re: [pyusb-users] Trying to write to OUT EP Bulk on Win10
> 
> On Tue, Mar 8, 2016 at 10:33 PM, Igor Bezenchuk <ig...@ho...> wrote:
> > I am Interested in generating random bulk traffic with libusb and pyusb
> > through different bulk devices(i.e Flash drives etc...).
> >
> > pyusb does enumerate device and it's endpoints correctly but it fails to
> > write to them.
> > as I saw in other posts this issue is well known in windows, my question is
> > there any way to go around this to write to device's EP in Windows without
> > installing custom driver with Zadig?
> >
> 
> No way under Windows. There is no generic USB driver attaching to
> all USB device.
> 
> 
> -- 
> Xiaofan
> 
> ------------------------------------------------------------------------------
> Transform Data into Opportunity.
> Accelerate data analysis in your applications with
> Intel Data Analytics Acceleration Library.
> Click to learn more.
> http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140
> _______________________________________________
> pyusb-users mailing list
> pyu...@li...
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