Re: [Libusb-devel] error submitting URB: No such file or directory

[Jeremy B. <go...@co...>]

Tim,

	Thank you very much.  That seems to be it; I knew I was doing  
something stupid.  Just to make sure I understand this then, I need  
to be looking for the bEndpointAddress field in the Interface  
Descriptor then?
	Thanks again.

-Jeremy

On Feb 22, 2007, at 12:30 PM, Tim Roberts wrote:

> Jeremy Beker wrote:
>> I am having a problem that is probably a stupid error on my part.  I
>> am trying to communicate with a smart card reader (I have tested this
>> with two models), and after claiming the interface, whenever I use
>> usb_bulk_write, I get the error "error submitting URB: No such file
>> or directory."
> ...
>> 									
>> 	ret = usb_bulk_write(
>> 		devHandle,
>> 		interface.bInterfaceNumber,
>> 		isTokPres,
>> 		len,
>> 		5000);
>>
>
> USB data is written to an endpoint number.  You are supplying the
> interface number.  The interface number is probably 0, and endpoint  
> 0 is
> always the control endpoint, not a bulk endpoint.
>
> -- 
> Tim Roberts, ti...@pr...
> Providenza & Boekelheide, Inc.
>
>
> ---------------------------------------------------------------------- 
> ---
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to  
> share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php? 
> page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Libusb-devel mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libusb-devel
>

-----
Jeremy Beker - go...@co...
http://www.confusticate.com
Condensing fact from the vapor of nuance.