On Sun, Jun 10, 2018 at 1:46 PM, Xiaofan Chen <[email protected]> wrote:
> On Wed, May 16, 2018 at 9:35 PM, Roland King <[email protected]> wrote:
>> .. my first post ..
>>
>> I have a device (Atmel running their vendor development USB stack).
>>
>> It has one configuration, one interface two alternates as they use an
>> isochronous endpoint and you can’t have that in the default configuration.
>> With the simplest example I can come up with I get ‘Errno 2 - entity not
>> found’ on any access to any endpoint on the device.
>
> I think pyusb may not work well with isochronous transfer. I have never
> tried myself.
It seems that you are not using isoc transfer but bulk so it should work.
On the other hand, I am not so sure if device understand this command.
dev.write(0x83,'test')
And you may want to specify the time out value.
> You may want to try out using C first to see if the device works under
> plain libusb under Mac OS X.
>
> You can also try this. It claims to support isochronous transfer.
> https://github.com/vpelletier/python-libusb1
--
Xiaofan
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