Re: [Libusb-win32-devel] libusb-win32 and ctypes codegenerator attempt...

[Ray S. <ra...@bl...>]

Hi Xiaofan,

At 06:14 PM 9/11/2006, you wrote:
>I've posted the binary packages in Microchip Forum.
>http://forum.microchip.com/tm.aspx?m=110205
>Check out the pyk-0.4 binary. ... You probably need to build your own wrapper
>depending on your tools.

OK; I just used the .4 binary, and v0.10 of libusb_win32

>> >2) PyUSB
>> >http://pyusb.berlios.de/
>>
>> It mostly works for me, but for some odd bulkread data drop/error.
>
>The author (Wander Lairson) is very helpful, you can always contact
>him about the error. Lat time I found a minor bug and he helped to solve it.

Yes, he is quite helpful, he's testing pyusb .34 with libusb_win32 v0.12 (he indicated)

>You can also use DebugView with and turn on debug option for libusb-win32.

Nice, I've re-installed .34/0.10 with debug on

My original code tells the device that it wants 2**8*64 samples
fh.controlMsg(HOST2DEVICE, request=int(0x04), buffer=struct.pack("L",256), index=INTERFACE)
and data always comes up an odd number short as I loop over
ans += bulkRead(ADS1271EVMBULKIN, usbBlocks*64)
The device thinks it's done, and I haven't gotten 16384 samples....

I tried your pyk-0.4 version of usb.py, but I haven't figured out how to do a usb_control_msg properly with it to send the device firmware its commands.

I also have some pyrex based libusb code from the firmware author to look at now, so I'll keep trying.

Thanks for the input!
Ray