Card Printer Driver Developement

[Premjo]

> Premjo wrote:
> > Thank you, Is CUPS supports bidirectional communication from the printer?,  our printer supports ribbon and other informations back to the driver.
>
> You can generally read responses from your device using the
> cupsBackChannelRead() function provided in CUPS 1.2 and higher.
>
> However, keep in mind that not all backends support bidi comm, so you
> should fall back to a unidirectional mode if cupsBackChannelRead()
> fails.
>
> --
> ______________________________________________________________________
> Michael R Sweet                        Senior Printing System Engineer
>

Do CUPS supports USB printers?