> Hi all,
>
> If I eliminate the line:
>
> handle.setConfiguration(1)
This is really weird, you could try your original code in Linux.
>
> I get an error: USBError: usb_submit_async: invalid configuration 0
Yes, now I remember, libusb needs set_configuration call for internals data
structures. Sorry making you loosing your time.
>
> So clearly a Configuration is needed. Not sure where to go from here. I'm
> wondering if I should just try to access LibUSB directly with Ctypes - that's
> what PyUSB does, right? I haven't seen any of the PyUSB code so I'm not
> sure what's under the hood. So maybe now the question is:
PyUSB 1.0 does, PyUSB 0.x is a native module, written in C.
>
> Is there a minimal amount of code, using Ctypes and LibUSB (win32) to
>
> 1. Instantiate and HID device (enumerated below)
> 2. Write a string
> 3. Read the response
You can give a look at PyUSB 1.0 sources at svn.
>
> Please let me know.
>
> Best Regards,
>
> J.D.
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> Sorry for the long delay, but I have had hardworking in my main job...
> Strange this error... Try to not call setConfiguration. Maybe the
> underline hardware
> driver already called it, and calling it twice may be causing the
> peripheral hangs...
>
> Wander
>
> 2009/11/9 J.D. Main <jdm...@comcast.net>:
>> Hi - thanks for the tip. It doesn't work though.
>>
>> The line:
>>
>> handle.setConfiguration(1)
>>
>> causes the whole program to lock up. The code never gets past it. Any
>> ideas about what's causing this?
>>
>> Best Regards,
>> J.D.
>>
>> Try this:
>>
>>> handle = dev.open()
>>> handle.setConfiguration(1)
>>> handle.interruptWrite(2,"hello world")
>>
>> But probably your device doesn't know what "hello world" means, some
>> expect no side effect...
>>
>> Wander
>>
>> 2009/11/4 J.D. Main <jdm...@comcast.net>:
>>> Hi folks,
>>>
>>> I was hoping to get a little snippet of code to help me query a USB
>>> temperature sensor with Python. I have installed libusb-win32 (v1.12.2)
> and
>>> pyusb (v0.4.2). I can sucessfully enumerate the device. Here's what it
>>> looks like:
>>>
>>> Device: \\.\libusb0-0008--0x1dfd-0x0002
>>> Device class: 0
>>> Device sub class: 0
>>> Device protocol: 0
>>> Max packet size: 8
>>> idVendor: 7677 (0x1dfd)
>>> idProduct: 2 (0x0002)
>>> Device Version: 01.10
>>> Configuration: 1
>>> Total length: 41
>>> selfPowered: 0
>>> remoteWakeup: 0
>>> maxPower: 200
>>> Interface: 0
>>> Alternate Setting: 0
>>> Interface class: 3
>>> Interface sub class: 0
>>> Interface protocol: 0
>>> Endpoint: 0x81L
>>> Type: 3
>>> Max packet size: 16
>>> Interval: 10
>>> Endpoint: 0x2L
>>> Type: 3
>>> Max packet size: 16
>>> Interval: 10
>>>
>>> I'm more used to working with serial ports than usb so I was hoping for a
>>> very minimal amount of code to:
>>>
>>> 1. Instantiate the device
>>> 2. Write a string ("hello world")
>>> 3. Read the response
>>>
>>> I have gotten as far as:
>>>
>>> handle = dev.open()
>>> handle.bulkWrite(0x81,"hello world")
>>>
>>> but then get an error: invalid endpoint 0x81
>>>
>>> I'm clearly missing some steps or doing something wrong. Any help
> would
>>> be greatly appreciated.
>>>
>>> Best Regards,
>>>
>>> J.D.
>
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