Hi Aribert,
On Friday, 19. October 2012 12:20:55 Aribert Börner wrote:
> To implement a control I plan to use Qt as a GUI in order to send
> commands via a "Profibus" (485), and events to welcome in the
> field.An USB port works as an interface with Qt, I have derived the
> frapted functions and it is a new class of signals and slots
> created.
> However, I get in contrast to the functional solution when calling
>
> ret = gbstw -> open (0x0403, 0x6001); //(vendor-id,product-id)
>
> I the feedback -1,: usb_find_busses () failed.
which version of libftdi are use using?
Also do you use the C++ wrapper?
May be it helps if you reduce the source of error by extending/adapting
one of the cmd line examples and try to reproduce the problem there.
Cheers,
Thomas
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