Re: [pyusb-users] USB topology

2016-05-17 Thread Nicolas Pinault 
Le 13/05/2016 à 17:36, Jeffrey Nichols a écrit :
> On 5/13/2016 10:39 AM, Nicolas Pinault wrote:
>> Le 13/05/2016 à 15:10, Jeffrey Nichols a écrit :
>> I already tried to use "port_numbers" but this field was always blank.
>> After updating libusb-1.0, this field is not blank anymore.
>>
>> What  I don't understand is that bus/port_number numbers are not unique.
>> On my system :
>>   IdVendor8086 IdProduct=1E26 bus=1 Address=1 port=0
>>   IdVendor8086 IdProduct=1E2D bus=2 Address=1 port=0
>> * IdVendor0204 IdProduct=6025 bus=1 Address=6 port=1 ports = (1, 6, 1)
>>   IdVendor0424 IdProduct=2513 bus=1 Address=2 port=6 ports = (1, 6)
>> + IdVendor046D IdProduct=C061 bus=2 Address=5 port=1 ports = (1, 1)
>>   IdVendor0529 IdProduct=0001 bus=1 Address=4 port=5 ports = (1, 5)
>>   IdVendor2CFF IdProduct=0002 bus=1 Address=5 port=2 ports = (1, 6, 2)
>>   IdVendor413C IdProduct=2107 bus=2 Address=2 port=2 ports = (1, 2)
>> + IdVendor8087 IdProduct=0024 bus=2 Address=4 port=1 ports = (1,)
>> * IdVendor8087 IdProduct=0024 bus=1 Address=3 port=1 ports = (1,)
>>   IdVendor8564 IdProduct=4000 bus=3 Address=20 port=8 ports = (8,)
>>   IdVendor8086 IdProduct=1E31 bus=3 Address=1 port=0
>>
>> The lines marked with a + or a * contains same bus/port_number numbers.
>> Only port_numbers field is different.
>> What does this mean ?
> When the bus is different, they're on totally different USB buses 
> (presumably this corresponds internally to USB root hubs, I'm not sure 
> of the technical details). That's always the first level of 
> differentiation.
>
Sure. It's so obvious I didn't mentioned it.
> The port always corresponds to the final number in the ports tuple. 
> It's the port number on the last hub in the hierarchy. It's not unique 
> enough to use to distinguish positions in the hierarchy (even when 
> combined with bus), and not terribly useful in my opinion.
That's what I discovered. Only port_numbers is useful.
>
> I use the tuple (bus, port_numbers) in my application to determine a 
> device's physical location, so when I tell a device to reboot into 
> bootloader mode I can find the new device in the same location (as a 
> device anywhere else could not be the one I'm looking for).
My use case is different but the idea is the same.

Nicolas

--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] USB topology

2016-05-13 Thread Nicolas Pinault 

Le 13/05/2016 à 16:39, Nicolas Pinault a écrit :

Le 13/05/2016 à 15:10, Jeffrey Nichols a écrit :

On 5/13/2016 9:03 AM, Nicolas Pinault wrote:

Le 12/05/2016 à 17:15, Wander Lairson Costa a écrit :

2016-05-12 11:40 GMT-03:00 Nicolas Pinault:

Hi,

Is it possible to retrieve USB bus topology with PyUSB ?


Yes, you will need to use the Device object "port_number" and "bus" properties.
While it is enough for my application, I don't see how to 
reconstruct the USB tree with just "port_number".
There's also "port_numbers", assuming you're using a somewhat recent 
libusb-1.0 version as your backend. Combine that with the bus 
attribute, and you can get a representation of the physical 
attachment point of the device.

I already tried to use "port_numbers" but this field was always blank.
After updating libusb-1.0, this field is not blank anymore.

What  I don't understand is that bus/port_number numbers are not unique.
On my system :
  IdVendor8086 IdProduct=1E26 bus=1 Address=1 port=0
  IdVendor8086 IdProduct=1E2D bus=2 Address=1 port=0
* IdVendor0204 IdProduct=6025 bus=1 Address=6 port=1 ports = (1, 6, 1)
  IdVendor0424 IdProduct=2513 bus=1 Address=2 port=6 ports = (1, 6)
+ IdVendor046D IdProduct=C061 bus=2 Address=5 port=1 ports = (1, 1)
  IdVendor0529 IdProduct=0001 bus=1 Address=4 port=5 ports = (1, 5)
  IdVendor2CFF IdProduct=0002 bus=1 Address=5 port=2 ports = (1, 6, 2)
  IdVendor413C IdProduct=2107 bus=2 Address=2 port=2 ports = (1, 2)
+ IdVendor8087 IdProduct=0024 bus=2 Address=4 port=1 ports = (1,)
* IdVendor8087 IdProduct=0024 bus=1 Address=3 port=1 ports = (1,)
  IdVendor8564 IdProduct=4000 bus=3 Address=20 port=8 ports = (8,)
  IdVendor8086 IdProduct=1E31 bus=3 Address=1 port=0

The lines marked with a + or a * contains same bus/port_number numbers.
Only port_numbers field is different.
What does this mean ?


After sorting results and analysing further, I understand the whole picture.
port_numbers like (1,) references a hub
port_numbers like (1, 6, 2) indicate the full path to reach the device 
(root/hub/device)
port_number references the port number of the last hub the device is 
connected on..


Nicolas
--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] USB topology

2016-05-13 Thread Nicolas Pinault 

Le 13/05/2016 à 15:10, Jeffrey Nichols a écrit :

On 5/13/2016 9:03 AM, Nicolas Pinault wrote:

Le 12/05/2016 à 17:15, Wander Lairson Costa a écrit :

2016-05-12 11:40 GMT-03:00 Nicolas Pinault:

Hi,

Is it possible to retrieve USB bus topology with PyUSB ?


Yes, you will need to use the Device object "port_number" and "bus" properties.
While it is enough for my application, I don't see how to reconstruct 
the USB tree with just "port_number".
There's also "port_numbers", assuming you're using a somewhat recent 
libusb-1.0 version as your backend. Combine that with the bus 
attribute, and you can get a representation of the physical attachment 
point of the device.

I already tried to use "port_numbers" but this field was always blank.
After updating libusb-1.0, this field is not blank anymore.

What  I don't understand is that bus/port_number numbers are not unique.
On my system :
  IdVendor8086 IdProduct=1E26 bus=1 Address=1 port=0
  IdVendor8086 IdProduct=1E2D bus=2 Address=1 port=0
* IdVendor0204 IdProduct=6025 bus=1 Address=6 port=1 ports = (1, 6, 1)
  IdVendor0424 IdProduct=2513 bus=1 Address=2 port=6 ports = (1, 6)
+ IdVendor046D IdProduct=C061 bus=2 Address=5 port=1 ports = (1, 1)
  IdVendor0529 IdProduct=0001 bus=1 Address=4 port=5 ports = (1, 5)
  IdVendor2CFF IdProduct=0002 bus=1 Address=5 port=2 ports = (1, 6, 2)
  IdVendor413C IdProduct=2107 bus=2 Address=2 port=2 ports = (1, 2)
+ IdVendor8087 IdProduct=0024 bus=2 Address=4 port=1 ports = (1,)
* IdVendor8087 IdProduct=0024 bus=1 Address=3 port=1 ports = (1,)
  IdVendor8564 IdProduct=4000 bus=3 Address=20 port=8 ports = (8,)
  IdVendor8086 IdProduct=1E31 bus=3 Address=1 port=0

The lines marked with a + or a * contains same bus/port_number numbers.
Only port_numbers field is different.
What does this mean ?

Regards,
Nicolas





Jeff


--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j


___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users



--
*Nicolas PINAULT
R electronics engineer
*** nico...@aaton.com 

*AATON-Digital*
38000 Grenoble - France
Tel +33 4 7642 9550

http://www.aaton.com
http://www.transvideo.eu
French Technologies for Film and Digital Cinematography

Follow us on Twitter
@Aaton_Digital
@Transvideo_HD

Like us on Facebook
https://www.facebook.com/AatonDigital

--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] USB topology

2016-05-13 Thread Jeffrey Nichols 

On 5/13/2016 9:03 AM, Nicolas Pinault wrote:

Le 12/05/2016 à 17:15, Wander Lairson Costa a écrit :

2016-05-12 11:40 GMT-03:00 Nicolas Pinault:

Hi,

Is it possible to retrieve USB bus topology with PyUSB ?


Yes, you will need to use the Device object "port_number" and "bus" properties.
While it is enough for my application, I don't see how to reconstruct 
the USB tree with just "port_number".
There's also "port_numbers", assuming you're using a somewhat recent 
libusb-1.0 version as your backend. Combine that with the bus attribute, 
and you can get a representation of the physical attachment point of the 
device.


Jeff
--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] USB topology

2016-05-13 Thread Nicolas Pinault 

Le 12/05/2016 à 17:15, Wander Lairson Costa a écrit :

2016-05-12 11:40 GMT-03:00 Nicolas Pinault :

Hi,

Is it possible to retrieve USB bus topology with PyUSB ?


Yes, you will need to use the Device object "port_number" and "bus" properties.
While it is enough for my application, I don't see how to reconstruct 
the USB tree with just "port_number".



Regards,
Nicolas

--
Nicolas PINAULT
R electronics engineer
nico...@aaton.com

AATON-Digital
38000 Grenoble - France
Tel +33 4 7642 9550

http://www.aaton.com
http://www.transvideo.eu
French Technologies for Film and Digital Cinematography

Follow us on Twitter
@Aaton_Digital
@Transvideo_HD

Like us on Facebook
https://www.facebook.com/AatonDigital


--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users







--
*Nicolas PINAULT
R electronics engineer
*** nico...@aaton.com 

*AATON-Digital*
38000 Grenoble - France
Tel +33 4 7642 9550

http://www.aaton.com
http://www.transvideo.eu
French Technologies for Film and Digital Cinematography

Follow us on Twitter
@Aaton_Digital
@Transvideo_HD

Like us on Facebook
https://www.facebook.com/AatonDigital

--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users

Re: [pyusb-users] USB topology

2016-05-12 Thread Wander Lairson Costa 
2016-05-12 11:40 GMT-03:00 Nicolas Pinault :
> Hi,
>
> Is it possible to retrieve USB bus topology with PyUSB ?
>

Yes, you will need to use the Device object "port_number" and "bus" properties.

>
> Regards,
> Nicolas
>
> --
> Nicolas PINAULT
> R electronics engineer
> nico...@aaton.com
>
> AATON-Digital
> 38000 Grenoble - France
> Tel +33 4 7642 9550
>
> http://www.aaton.com
> http://www.transvideo.eu
> French Technologies for Film and Digital Cinematography
>
> Follow us on Twitter
> @Aaton_Digital
> @Transvideo_HD
>
> Like us on Facebook
> https://www.facebook.com/AatonDigital
>
>
> --
> Mobile security can be enabling, not merely restricting. Employees who
> bring their own devices (BYOD) to work are irked by the imposition of MDM
> restrictions. Mobile Device Manager Plus allows you to control only the
> apps on BYO-devices by containerizing them, leaving personal data untouched!
> https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
> ___
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>



-- 
Best Regards,
Wander Lairson Costa

--
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
___
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users