Repair that there is a vendor control request issued before sending
the command 0x00 0xFF 0xFF.
RequestType = 0x40 (which means vendor)
Request = 0x02
Value = 0x02
Index = 0x00
There is no data payload.
Try the following:
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()
## HERE THE CONTROL TRANSFER
dev.ctrl_transfer(bmRequestType=0x04, bmRequest=0x02, wValue=0x02)
msg = [0x00, 0xFF, 0xFF]
sent_bytes = dev.write(0x02, msg, 0, 100)
Hopefully you can read some response from the device...
Wander
2010/1/24 Romain Aviolat <r.avio...@gmail.com>:
> Ooops my mail was too big, I pasted the log files on pastebin instead.
>
> Yes I did both sniffing, from linux with usbmon and from windows itself with
> usbsnoop.
> What I didn't do is starting sniffing when I plug the device, I always
> started sniffing before pressing the "download data" button under windows
> when the device was already connected.
>
> This first log file is from windows running usbsnoop when I plug the device.
> I don't know if this traffic is generated from windows querying the device
> or from the device driver initialising the device.
> http://pastebin.com/f43a0c4a0
>
> The second log file, always from windows, is when I press the "download
> data" button from the device software, so nothing happened between this log
> and the previous one on the usb port
> http://pastebin.com/f7acda94a
>
> Hope you can help me, I'm really stucked at this point
>
> Thanks,
> Romain
>
>
> On Fri, Jan 22, 2010 at 2:43 PM, Romain Aviolat <r.avio...@gmail.com> wrote:
>>
>> There must be some earlier data exchange, either on the out/in
>> endpoint or in the default control endpoint... As you sad you were
>> using a Windows VM for reverse engineering, you can use a USB sw
>> sniffer to check it...
>>
>> You can use that: http://sourceforge.net/projects/usbsnoop/
>>
>> Wander
>>
>> 2010/1/22 Romain Aviolat <r.avio...@gm...>:
>> > 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.avio...@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.avio...@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
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------------------------------------------------
>> >> > Throughout its 18-year history, RSA Conference consistently attracts
>> >> > the
>> >> > world's best and brightest in the field, creating opportunities for
>> >> > Conference
>> >> > attendees to learn about information security's most important issues
>> >> > through
>> >> > interactions with peers, luminaries and emerging and established
>> >> > companies.
>> >> > http://p.sf.net/sfu/rsaconf-dev2dev
>> >> > _______________________________________________
>> >> > Pyusb-users mailing list
>> >> > pyusb-us...@li...
>> >> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
>> >> >
>> >> >
>> >
>> >
>> >
>> > ------------------------------------------------------------------------------
>> > Throughout its 18-year history, RSA Conference consistently attracts the
>> > world's best and brightest in the field, creating opportunities for
>> > Conference
>> > attendees to learn about information security's most important issues
>> > through
>> > interactions with peers, luminaries and emerging and established
>> > companies.
>> > http://p.sf.net/sfu/rsaconf-dev2dev
>> > _______________________________________________
>> > Pyusb-users mailing list
>> > pyusb-us...@li...
>> > https://lists.sourceforge.net/lists/listinfo/pyusb-users
>> >
>> >
>
>
> ------------------------------------------------------------------------------
> Throughout its 18-year history, RSA Conference consistently attracts the
> world's best and brightest in the field, creating opportunities for
> Conference
> attendees to learn about information security's most important issues
> through
> interactions with peers, luminaries and emerging and established companies.
> http://p.sf.net/sfu/rsaconf-dev2dev
> _______________________________________________
> Pyusb-users mailing list
> Pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
>
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