Sylvestre Gallon wrote:
On Sun, Jun 7, 2009 at 4:45 AM, Jack Twilley<[email protected]> wrote:
I have been looking through the source to usbconfig and other tools trying
to figure out how to retrieve the iManufacturer and iProduct strings. The
libusb20 man page describes the libusb20_dev_get_device_desc() function but
there's no useful information on the struct it returns. The include file
looks as if the struct is automagically generated by macros within macros
which is too complicated for me to figure out without help. Any ideas?
There's gotta be a better way than using LIBUSB20_DEVICE_DESC()...
Jack.
You can use the function libusb20_dev_get_device_desc() that
returns a struct LIBUSB20_DEVICE_DESC_DECODED *. The field
idVendor and idProduct in the struct LIBUSB20_DEVICE_DESC_DECODED
are what you are looking for :)
idVendor and idProduct look good according to the output of usbconfig,
but whenever I try to refer to ddesc->idVendor (or anything else in that
structure) I get "error: dereferencing pointer to incomplete type".
This is what sent me looking through the includes for the actual type
definition.
Other than the usbconfig code that uses the LIBUSB20_DEVICE_DESC()
macro, is there any other example code out there that does what I'm
trying to do?
Cheers,
Thanks!
Jack.
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