On 05/21/2014 05:27 PM, Wander Lairson Costa wrote:
> 2014-05-21 3:00 GMT-03:00 Slavko Kocjancic <esla...@gmail.com>:
>> On 05/21/2014 03:36 AM, Wander Lairson Costa wrote:
>>> 2014-05-20 13:26 GMT-03:00 Slavko Kocjancic <esla...@gmail.com>:
>>>> Hello...
>>>>
>>>> I'm new to python (and pyusb).
>>>> I try to port some VUSB device to work with python, but get at trouble
>>>> in beggining. I can't send bytes...
>>>> here is my example (stripped from manual...)
>>>>
>>>> import usb.core
>>>> import usb.util
>>>>
>>>> from array import *
>>>> dev = usb.core.find(idVendor=0x16c0, idProduct=0x05df)
>>>> if dev is None:
>>>> raise ValueError('Device not found')
>>>> dev.set_configuration()
>>>>
>>>> msg = 'test'
>>>> print dev.ctrl_transfer(32+128, 9, 0, 0, msg)
>>>>
>>> I guess the first argument should be just 32.
>> Well I want write. And bit 7 of first argument tells if this is write or
>> read.
>> and msg (at least by manual) behave as buffer for tx, and integer for
>> size in receive mode.
>>
> Yes, with this bit set, the request is an IN transfer, and the `msg`
> parameter is (wrongly) interpreted as the length of the transfer.
I realized that when I wan't to read from device. I'm interpreted this
bit just opposite. But have other problem with win driver and take a lot
of time to discover what are wrong. At least it works now.
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