[cups.general] Backend not detects USB printer

[Michael R Sweet]

shermin wrote:
> Hi,
> I am trying to develop custom backend for my printer using libusb.I tried to get the device id for my printer.I checked the libusb code coming with cups but unable to find the parameters to usb_control_msg.How will we identify the requesttype,request,value and index for this ??
> What i understood is that i dont have to send any vendor specific commands for getting the device id.COrrect me if i am wrong.

This is correct for USB printer class devices, but yours apparently
does not report itself as a printer and may have its own vendor- or
class-specific stuff to deal with...

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Michael R Sweet                        Senior Printing System Engineer