When I test the read() in bulkloop program, it can read the
data successfully.
I don't know how to test it now...



On Sat, Feb 18, 2012 at 12:10 AM, Yunong Pang <029...@gmail.com> wrote:

> I grep out two results...
> $ rpm -qa | grep libusb
>
> libusb1-1.0.8-1.fc14.i686
> libusb-0.1.12-23.fc14.i686
>
> I don't know which one is my libusb version.
>
> On Sat, Feb 18, 2012 at 12:03 AM, Wander Lairson Costa <
> wander.lair...@gmail.com> wrote:
>
>> 2012/2/17 Yunong Pang <029...@gmail.com>:
>> > Bus 002 Device 018: ID 0547:1002 Anchor Chips, Inc. Python2 WDM Encoder
>> > Device Descriptor:
>> >   bLength                18
>> >   bDescriptorType         1
>> >   bcdUSB               2.00
>> >   bDeviceClass            0 (Defined at Interface level)
>> >   bDeviceSubClass         0
>> >   bDeviceProtocol         0
>> >   bMaxPacketSize0        64
>> >   idVendor           0x0547 Anchor Chips, Inc.
>> >   idProduct          0x1002 Python2 WDM Encoder
>> >   bcdDevice            0.00
>> >   iManufacturer           1 FCTECH
>> >   iProduct                2 SLAVEFIFO
>> >   iSerial                 0
>> >   bNumConfigurations      1
>> >   Configuration Descriptor:
>> >     bLength                 9
>> >     bDescriptorType         2
>> >     wTotalLength           32
>> >     bNumInterfaces          1
>> >     bConfigurationValue     1
>> >     iConfiguration          0
>> >     bmAttributes         0xa0
>> >       (Bus Powered)
>> >       Remote Wakeup
>> >     MaxPower              500mA
>> >     Interface Descriptor:
>> >       bLength                 9
>> >       bDescriptorType         4
>> >       bInterfaceNumber        0
>> >       bAlternateSetting       0
>> >       bNumEndpoints           2
>> >       bInterfaceClass       255 Vendor Specific Class
>> >       bInterfaceSubClass      0
>> >       bInterfaceProtocol      0
>> >       iInterface              0
>> >       Endpoint Descriptor:
>> >         bLength                 7
>> >         bDescriptorType         5
>> >         bEndpointAddress     0x02  EP 2 OUT
>> >         bmAttributes            2
>> >           Transfer Type            Bulk
>> >           Synch Type               None
>> >           Usage Type               Data
>> >         wMaxPacketSize     0x0200  1x 512 bytes
>> >         bInterval               0
>> >       Endpoint Descriptor:
>> >         bLength                 7
>> >         bDescriptorType         5
>> >         bEndpointAddress     0x86  EP 6 IN
>> >         bmAttributes            2
>> >           Transfer Type            Bulk
>> >           Synch Type               None
>> >           Usage Type               Data
>> >         wMaxPacketSize     0x0200  1x 512 bytes
>> >         bInterval               0
>> > Device Qualifier (for other device speed):
>> >   bLength                10
>> >   bDescriptorType         6
>> >   bcdUSB               2.00
>> >   bDeviceClass            0 (Defined at Interface level)
>> >   bDeviceSubClass         0
>> >   bDeviceProtocol         0
>> >   bMaxPacketSize0        64
>> >   bNumConfigurations      1
>> > Device Status:     0x0002
>> >   (Bus Powered)
>> >   Remote Wakeup Enabled
>> >
>>
>> I don't think this is related to PyUSB, but with libusb. What libusb
>> version are you using?
>>
>> --
>> Best Regards,
>> Wander Lairson Costa
>>
>>
>> ------------------------------------------------------------------------------
>> Virtualization & Cloud Management Using Capacity Planning
>> Cloud computing makes use of virtualization - but cloud computing
>> also focuses on allowing computing to be delivered as a service.
>> http://www.accelacomm.com/jaw/sfnl/114/51521223/
>> _______________________________________________
>> pyusb-users mailing list
>> pyusb-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>>
>
>
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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