I plugged the device into a linux box and got some better error messages.
"bConfigurationValue" above should be 1 instead of 0, and I was not
respected wLength from the GET_DESCRIPTOR setup packet. And I had a struct
padding problem. After fixing all those things I can now libusb_open()
under cygwin, woohoo!
Dan.
On Thu, Apr 18, 2013 at 1:47 PM, Daniel Goertzen <
d...@networkintegritysystems.com> wrote:
> Thanks Tim. Descriptors below. I have no endpoints; I want to fool with
> control transactions first(little steps). Total length is 18.
>
> Dan.
>
> static const configuration_descriptor_t static_config = {
> sizeof(configuration_descriptor_t), // bLength
> 0x02, // bDescriptorType
> 0, // wTotalLength (calculate later)
> 1, // bNumInterfaces
> 0, // bConfigurationValue
> 4, // iConfiguration
> 0x80, // bmAttributes
> 250 // bMaxPower
> };
>
> static const interface_descriptor_t static_iface = {
> sizeof(interface_descriptor_t), // bLength
> 0x4, // bDescriptorType
> 0, // bInterfaceNumber
> 0, // bAlternateSetting
> 0, // bNumEndpoints
> 0xff, // bInterfaceClass
> 0xff, // bInterfaceSubClass
> 0xff, // bInterfaceProtocol
> 5 // iInterface
> };
>
>
>
> On Thu, Apr 18, 2013 at 12:23 PM, Tim Roberts <t...@probo.com> wrote:
>
>> Daniel Goertzen wrote:
>> > I have libusbx compiling under cygwin now and can look at the device
>> > descriptors for all attached devices, but I cannot libusb_open() my
>> > device. The error given is -12 (LIBUSB_ERROR_NOT_SUPPORTED).
>> >
>> > I ran zadig and bound my device to WinUSB, but still no luck (I have
>> > to admit, I don't exactly understand how that all works).
>> >
>> > One thing of note, zadig shows the WinUSB version number as
>> > 6.1.76000.16385, whereas the version number on my Windows 8 system
>> > is 6.2.9200.16384.
>>
>> 7600 is the master build number for Win 7. 9200 is the master build
>> number for Win 8. The WinUSB installation process only installs the DLL
>> and driver if the version is newer than what's already on the system.
>>
>>
>> > Also of note, I am trying to connect to a LPC11u24 with unproven
>> > firmware. The uC is seeing GET_DESCRIPTOR and SET_ADDRESS commands
>> > and nothing else. My device descriptor is below.
>>
>> What does the configuration descriptor look like?
>>
>> --
>> Tim Roberts, t...@probo.com
>> Providenza & Boekelheide, Inc.
>>
>>
>>
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>
>
>
>
>
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
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