Thread: Re: [Pyusb-users] PyUSB how to set the ControlOutput message ?

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My device has 1 configuration, 1 interface, and two endpoints

Bus 002 Device 002: ID 10c4:0002 Cygnal Integrated Products, Inc. F32x
USBXpress Device
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x10c4 Cygnal Integrated Products, Inc.
  idProduct          0x0002 F32x USBXpress Device
  bcdDevice            1.00
  iManufacturer           1 Silicon Labs
  iProduct                2 USB API
  iSerial                 3 1
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
      (Bus Powered)
    MaxPower               60mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         0 (Defined at Interface level)
      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     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0000

I'm running ubuntu linux ans PyUSB1.0 you are right.

On Fri, Jan 22, 2010 at 10:05 AM, Romain Aviolat <r.a...@gm...>wrote:

> This can be many things, does your device have more than one
> configuration or interface/alternate setting? And about the endpoint
> address? I see you are using PyUSB 1.0, are you running it under
> Windows? I haven't tested it in Windows yet (actually I did, but there
> are some issues that I did not fix yet, then I could not progress with
> tests).
>
> Wander
>
> 2010/1/21 Romain Aviolat <r.aviolat@gm...>:
> > Hi, this my first time in this mailing list,
> >
> > I'm trying to reverse a device that has no support for Linux, I'm new to
> > pyusb and have a problem with my script.
> >
> > I sniffed the USBlog from a virtual machine running windows and my
> working
> > device here's the log:
> >
> > f53ed800 355026092 S Co:2:002:0 s 40 02 0002 0000 0000 0
> > f53ed800 355027800 C Co:2:002:0 0 0
> > f53ed800 355075185 S Bo:2:002:2 -115 3 = 00ffff
> >
> > If the device receive the 0x00, 0xFF, 0xFF sequence, it then send it's
> data
> >
> > Here's my code (mainly used the examples on the pyusb website)
> >
> > ------------------------
> > import usb.core
> > import usb.util
> >
> > # find our device
> > dev = usb.core.find(idVendor=0x10c4, idProduct=0x0002)
> >
> > # was it found?
> > if dev is None:
> >     raise ValueError('Device not found')
> >
> > # set the active configuration. With no arguments, the first
> > # configuration will be the active one
> >
> > dev.set_configuration()
> >
> > msg = [0x00, 0xFF, 0xFF]
> > sent_bytes = dev.write(0x02, msg, 0, 100)
> > ------------------------
> >
> > and here's the output
> >
> > f341b700 484297497 S Co:2:003:0 s 00 09 0001 0000 0000 0
> > f341b700 484299102 C Co:2:003:0 0 0
> > f341b700 484312389 S Bo:2:003:2 -115 3 = 00ffff
> >
> > The 0x00, 0xFF, 0xFF sequence is correctly sent but the device doesn't
> send
> > it's data, we can see in the first line of both log that the
> ControlOutput
> > is not the same, I think this is my problem.
> >
> > I don't know how to change 09 0001 0000 0000 to 40 02 0002 0000 0000
> >
> > Hope someone can help me,
> >
> > Cheers, Romain
> >
> >
> >
> >
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