[cups.general] Card Printer Driver Developement

[Michael R Sweet]

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.

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Michael R Sweet                        Senior Printing System Engineer